MOLECULAR BIOSYSTEMS INC
10-K405, 1997-05-22
IN VITRO & IN VIVO DIAGNOSTIC SUBSTANCES
Previous: SYNBIOTICS CORP, POS AM, 1997-05-22
Next: EUROPACIFIC GROWTH FUND, 24F-2NT, 1997-05-22



<PAGE>
- --------------------------------------------------------------------------------
- --------------------------------------------------------------------------------
 
                       SECURITIES AND EXCHANGE COMMISSION
 
                             WASHINGTON, D.C. 20549
 
                            ------------------------
 
                                   FORM 10-K
 
(Mark One)
   [X]          Annual Report Pursuant to Section 13 or 15(d) of
                      the Securities Exchange Act of 1934
 
                    FOR THE FISCAL YEAR ENDED MARCH 31, 1997
 
   [ ]         Transaction Report Pursuant to Section 13 or 15(d)
                     of the Securities Exchange Act of 1934
 
                         Commission file number 0-12648
 
                           MOLECULAR BIOSYSTEMS, INC.
 
             (Exact name of registrant as specified in its charter)
 
               DELAWARE                                 36-3078632
   (State or other jurisdiction of                   (I.R.S. Employer
    incorporation or organization)                 Identification No.)
 
             10030 Barnes Canyon Road, San Diego, California 92121
              (Address of principal executive offices) (Zip Code)
 
       Registrant's telephone number, including area code: (619) 452-0681
 
          Securities registered pursuant to Section 12(b) of the Act:
 
         Title of each class                  Name of each exchange on which
     Common Stock, $.01 par value                       registered
                                                 New York Stock Exchange
 
          Securities registered pursuant to Section 12(g) of the Act:
                                      None
 
    Indicate by check mark whether the registrant (1) has filed all reports
required to be filed by Section 13 or 15(d) of the Securities Exchange Act of
1934 during the preceding 12 months (or for such shorter period that the
registrant was required to file such reports), and (2) has been subject to such
filing requirements for the past 90 days.  Yes [X] No [  ]
 
    Indicate by check mark if disclosure of delinquent filers pursuant to Item
405 of Regulation S-K is not contained herein, and will not be contained, to the
best of registrant's knowledge, in definitive proxy or information statements
incorporated by reference in Part III of this Form 10-K or any amendment to this
Form 10-K.  [X]
 
    The aggregate market value of voting stock held by non-affiliates of the
registrant was $135,350,587 as of May 16, 1997 (computed by reference to the
last sale price of a share of the registrant's Common Stock on that date as
reported on the New York Stock Exchange).
 
    There were 17,750,897 shares outstanding of the registrant's Common Stock as
of May 16, 1997.
 
DOCUMENTS INCORPORATED BY REFERENCE
 
    Information required by Items 10, 11, 12 and 13 of this Report is
incorporated by reference to the registrant's definitive proxy statement for the
1997 Annual Meeting of Stockholders to be held August 20, 1997.
 
- --------------------------------------------------------------------------------
- --------------------------------------------------------------------------------
<PAGE>

                                        PART I

ITEM 1.       BUSINESS

    THE FOLLOWING DISCUSSION CONTAINS FORWARD-LOOKING STATEMENTS THAT INVOLVE
RISKS AND UNCERTAINTIES. THE COMPANY'S ACTUAL RESULTS COULD DIFFER MATERIALLY
FROM THOSE DISCUSSED HERE. FACTORS THAT COULD CAUSE OR CONTRIBUTE TO SUCH
DIFFERENCES INCLUDE, BUT ARE NOT LIMITED TO, THOSE DISCUSSED IN THIS ITEM AND IN
ITEM 7, "MANAGEMENT'S DISCUSSION AND ANALYSIS OF FINANCIAL CONDITION AND RESULTS
OF OPERATIONS."

GENERAL

    Molecular Biosystems, Inc. ("MBI" or the "Company") is a leader in the 
development, manufacture and sale of ultrasound contrast imaging agents. 
These contrast agents are used to improve the real-time images ("moving 
pictures") of organs and body structures, especially the heart, obtained 
through ultrasound examinations. MBI's products are designed to increase the 
diagnostic usefulness of ultrasound examinations through enhanced 
visualization of structures and vasculature, and to reduce the need for 
diagnostic procedures that may be more expensive, time-consuming, or 
invasive. MBI's first product, ALBUNEX-Registered Trademark-, is the first 
and only ultrasound contrast agent approved for marketing by the United 
States Food and Drug Administration ("FDA"). ALBUNEX-Registered Trademark- is 
used to detect heart disease by assessing blood flow within the heart 
chambers and identifying the location of the chamber borders and the movement 
of the chamber walls ("cardiac function"). MBI's second-generation product, 
OPTISON-TM- (formerly known by its code name, FS069), is under review by the 
Food and Drug Administration for the cardiac function indication and in Phase 
2 clinical trials to evaluate its efficacy in determining whether the heart 
muscle is receiving an adequate blood supply ("myocardial perfusion"). The 
Company believes that this information will enable cardiologists to diagnose 
heart attacks and coronary artery disease more accurately and safely than is 
currently feasible. The Company is also conducting studies using OPTISON-TM- 
to detect abnormalities in other organs, such as the liver and kidney.

    Ultrasound imaging is a widely-used and cost-effective technique to examine
soft tissues, internal body organs and blood flow. Ultrasound systems use
low-power, high-frequency sound waves that are reflected by tissues and fluids
to produce real-time images. Over 51 million ultrasound imaging procedures were
performed in the United States in 1996, of which approximately 14.2 million
procedures were used to examine the heart ("echocardiograms"). Unlike other
imaging modalities, such as magnetic resonance imaging, computed tomography and
nuclear imaging, ultrasound imaging procedures could not be performed with
contrast agents to enhance images until the approval of ALBUNEX-Registered
Trademark-. Non-contrast ultrasound, while very good in delineating anatomy,
often results in poor image quality and is unable to demonstrate actual blood
flow within organ tissue.

    MBI's contrast agents are designed to enhance existing ultrasound
procedures by improving their ability to image blood flow and by providing
clearer images of body structures and organs. ALBUNEX-Registered Trademark- and
OPTISON-TM- consist of human albumin microspheres made using MBI's patented
process. The microspheres are injected intravenously into the bloodstream and
transported to the heart and other organs. Because the microspheres are highly
reflective to the ultrasound beam, organs and structures containing blood will
appear brighter and clearer than they would in the absence of the contrast
agent. Albumin is a protein naturally found in human blood and has been used for
many years as a blood expander. ALBUNEX-Registered Trademark-, which has been
marketed since October 1993, has been given to over 30,000 patients with no
clinically significant side effects, and OPTISON-TM- has exhibited a safety
profile in clinical studies equivalent to that of ALBUNEX-Registered 
Trademark-.

    ALBUNEX-Registered Trademark- permits cardiologists to see blood flow in
the chambers of the heart and the motion of the heart muscle using ultrasound.
Cardiologists are particularly interested in the chamber of the heart called the
"left ventricle," which pumps oxygenated blood arriving from the lungs to all
other parts of the body. In approximately 10-15% of patients undergoing an
echocardiogram, the wall of the left ventricle (the "endocardial border") cannot
be detected or its location appears ambiguous on the ultrasound image. When
ALBUNEX-Registered Trademark- enters the left ventricle, however, the
endocardial border can be visualized because of the reflectivity of the
ALBUNEX-Registered Trademark- microspheres in the blood. When the endocardial


                                          2
<PAGE>

border is visible, cardiologists can observe its motion and may be able to infer
cardiac function, which is critical in diagnosing cardiac disease, including
damage from a heart attack. While ALBUNEX-Registered Trademark- is able to enter
the heart chamber, it has a relatively short circulation time in the body and
thus is not able to enter the heart muscle in quantities sufficient to be
detected by ultrasound. Without an agent that will enter the heart muscle,
cardiologists are not able to use ultrasound imaging directly to determine
myocardial perfusion.

    OPTISON-TM- is designed to permit cardiologists to evaluate myocardial
perfusion. Unlike ALBUNEX-Registered Trademark-, which is air-filled,
OPTISON-TM- microspheres contain an insoluble gas, perfluoropropane. Because of
their composition, OPTISON-TM- microspheres remain in the bloodstream for more
than 5 minutes, as opposed to 35-40 seconds in the case of ALBUNEX-Registered
Trademark-. As a result, OPTISON-TM- is able to perfuse into tissues, including
the heart muscle, highlighting areas of normal and abnormal blood flow. The
Company believes that if its clinical trials for myocardial perfusion are
successful, OPTISON-TM- will provide important diagnostic benefits, including
detecting areas of the heart muscle compromised due to coronary artery stenosis
as well as detecting the lack of blood flow in the heart muscle resulting from a
complete occlusion of a coronary artery (heart attack). The Company believes
that OPTISON-TM- may have much greater market potential than ALBUNEX-Registered
Trademark- because of the greater diagnostic importance of the indications for
which it may be suitable (such as myocardial perfusion, when used in 
conjunction with new ultrasound imaging modalities such as harmonic imaging).

    MBI completed enrollment in its Phase 3 clinical trials for OPTISON-TM- for
cardiac function in March 1996. In October 1996, the Company filed a Pre-Market
Approval ("PMA") application with the U.S. Food and Drug Administration and on
February 24, 1997, the FDA's advisory Radiological Devices Panel recommended
approval of the Company's PMA for OPTISON-TM-. The FDA is currently enjoined
from continuing any approval or review procedures relating to the Company's PMA
until 10 days after the FDA resolves the merits of certain citizens petitions
previously filed with the FDA by competitors of the Company. See "Item 3 - Legal
Proceedings." Additionally, in March 1997, the Company received acceptance for
its OPTISON-TM- Marketing Authorization application in the European Union. For
myocardial perfusion, Phase 1 safety and preliminary efficacy studies were
completed in July 1995. In March 1996, the Company announced that preliminary
analysis of Phase 2 results indicated a 92% concordance between diagnoses of
patients with known or suspected heart disease made using dipyridamole-stress
nuclear imaging, the current perfusion "gold standard" and dipyridamole-stress
harmonic ultrasound imaging using OPTISON-TM-. The Company believes that the use
of OPTISON-TM- in routine diagnostic as well as emergency room procedures may
significantly reduce the overall cost of patient care by substituting ultrasound
for more expensive diagnostic methods such as nuclear imaging and by enabling
more accurate screening of patients to determine whether follow-up diagnostic or
surgical procedures are required.

    MBI is also developing an oral ultrasound agent, ORALEX-Registered
Trademark-, which may be used to image the abdominal area for stomach lesions
and pancreatic tumors. ORALEX-Registered Trademark- is currently in Phase 2
clinical trials.

    MBI is collaborating with Mallinckrodt Medical, Inc. ("Mallinckrodt") in 
the development and commercialization of ALBUNEX-Registered Trademark- and 
OPTISON-TM-. Mallinckrodt is one of the world leaders in the marketing of 
contrast imaging agents, with 1995 contrast imaging agent sales of 
approximately $675 million. The Company has granted Mallinckrodt exclusive 
marketing rights to ALBUNEX-Registered Trademark- and OPTISON-TM- in the 
United States, Europe, and certain other territories. The relationship began 
in 1988 with the execution of a distribution agreement for North and South 
America and a related investment agreement pursuant to which Mallinckrodt 
paid the Company approximately $30.0 million.

    The Company and Mallinckrodt expanded their original agreement in 
September 1995 when the parties entered into an Amended and Restated 
Distribution Agreement ("ARDA"). ARDA expands the geographic scope and 
extends the exclusivity of Mallinckrodt's marketing rights. Mallinckrodt at 
that time also made a $13.0 million equity investment in MBI and committed 
$20.0 million to the clinical development of OPTISON-TM- and related 
projects. MBI may receive up to an additional $14.5 million upon meeting 
certain territorial and product development milestones, of which $3.0 million 
have been received to date.  There can be no assurances, however, that future 
milestones will be met.

    In December 1996, the Company and Mallinckrodt amended ARDA to further 
expand the geographical scope of Mallinckrodt's exclusive marketing and 
distribution rights for ALBUNEX-Registered Trademark-, OPTISON-TM- and 
related products.  The amendment extended Mallinckrodt's exclusive territory 
to include the territory that the Company had formerly licensed to Nycomed 
consisting of Europe, Africa, India and parts of Asia.

    Under the distribution agreement, the Company is responsible for
manufacturing the licensed products for Mallinckrodt and is generally entitled
to payments of 40% of net product sales. The Company is responsible for
conducting clinical trials and securing regulatory approvals of the licensed
products in the United States for cardiac indications. Mallinckrodt is
responsible for conducting clinical trials and securing approvals of the
licensed products in


                                          3
<PAGE>

the United States for non-cardiac indications and is responsible for conducting
all clinical trials and securing approvals in the other countries in
Mallinckrodt's territory.

BUSINESS STRATEGY

    The Company's objective is to remain a leader in the development and
commercialization of contrast imaging agents. MBI intends to achieve this
objective by implementing the following strategy.

    DEVELOP OPTISON-TM- FOR MULTIPLE INDICATIONS. MBI's primary clinical
developmental objective is to gain regulatory approval in the United States and
abroad for OPTISON-TM- for the diagnosis of multiple cardiac indications, such
as cardiac function and myocardial perfusion. Thereafter the Company intends to
expand the application of OPTISON-TM- by seeking approval for non-cardiac
(radiology) indications. The Company believes that the extensive knowledge that
it and Mallinckrodt have gained through the marketing of ALBUNEX-Registered
Trademark- regarding the requirements of the medical and third-party payor
communities may allow for the more rapid and effective commercialization of
OPTISON-TM- and future products.

    DEMONSTRATE COST-EFFECTIVENESS. The Company and Mallinckrodt will 
continue to design studies to demonstrate the overall cost-effectiveness of 
using the Company's ultrasound contrast agents. The Company believes that 
such studies may establish that use of ALBUNEX-Registered Trademark-, 
OPTISON-TM- and ORALEX-Registered Trademark- can significantly reduce the 
overall cost of patient care by substituting ultrasound for more expensive  
diagnostic modalities, and by enabling more accurate screening of patients to 
determine whether follow-up diagnostic or therapeutic procedures are required.

    NEW PRODUCT DEVELOPMENT. The Company has established significant clinical,
regulatory and manufacturing expertise in the development of ALBUNEX-Registered
Trademark- and OPTISON-TM-. The Company intends to utilize this expertise in the
development of new, proprietary imaging products.

INDUSTRY BACKGROUND

NON-ULTRASOUND IMAGING TECHNIQUES

    Since the discovery of x-rays, medical imaging has been used extensively to
diagnose and guide the treatment of diseases and injuries to internal organs.
Medical imaging can be used to identify high-risk patients, to make initial
diagnoses, to confirm diagnoses based on other information, to formulate
treatment plans, and to evaluate the effectiveness of treatment and detect the
recurrence of a medical problem. Generally, imaging improves patient care and
lowers health care costs by enabling the detection of disease or abnormal
structures not apparent by routine physical examination.

    There are a variety of medical imaging methods, or "modalities," available
to the physician. The choice of modality by the physician depends on a number of
factors, including the part of the body to be imaged, the suspected condition to
be investigated, the cost of the procedure, the diagnostic usefulness of the
image and the condition of the patient. Other important factors in determining
the selection of a modality are the availability of equipment and trained
operators and the ability to schedule time on the equipment. The major
non-ultrasound modalities are:

    COMPUTED TOMOGRAPHY ("CT"). CT employs x-rays aimed into the body from
several different angles to create a computerized static "snapshot" image of
soft tissue and bones. CT is used extensively to image the head and neck for
injury and disease, and is also used to detect liver cancer and other
hepatobiliary diseases. CT may employ injectable contrast agents which absorb
x-rays and thereby enhance structural imaging. In 1996, approximately 23.5
million CT examinations were performed in the United States, approximately 44%
of which employed a contrast agent. While CT is


                                          4
<PAGE>

effective in revealing anatomic detail, it is expensive, does not generally 
provide real-time images ("moving pictures") or permit the assessment of 
blood flow, and exposes patients to radiation. CT is rarely used to image the 
heart.

    CONVENTIONAL X-RAY. Familiar procedures such as chest x-rays and mammograms
use x-rays aimed from only a single angle and do not require computer
reconstruction to create an image. In 1994, approximately 5.2 million abdominal
x-rays performed in the United States employed barium as a contrast agent to
examine the gastrointestinal system. Conventional x-ray is not used to assess
heart function.

    MAGNETIC RESONANCE IMAGING ("MRI"). MRI creates an image by exposing the
body to a radio frequency pulse to which the body's hydrogen atoms respond in a
way detectable by the MRI equipment. This information is analyzed by computer
and a cross-sectional image is produced. MRI is used primarily to image soft
tissues in order to detect tumors, lesions, and injuries. An accurate image is
produced, but as with CT, the images are not real-time. In addition, MRI does
not generally provide information on blood flow or perfusion of blood into
organs and tissues, and is not used to image the heart. In 1996, approximately
8.5 million MRI procedures were performed in the United States, approximately
29% of which used a contrast imaging agent. In 1994, MRI equipment cost up to $2
million.

    NUCLEAR IMAGING. Nuclear imaging requires the injection of radioactive
substances into the body. It is typically preceded by a stress echo exam. The
radiation is detected by a special camera and analyzed by computer, resulting in
a static image that does not depict blood flow. Great care is required in the
handling and disposal of radioactive contrast agents. It is used primarily to
detect cardiovascular disease, malignancies and soft-tissue tumors. It is also
the current "gold standard" used to detect myocardial perfusion. Approximately
10 million nuclear imaging procedures were performed in the United States in
1994, approximately 3.0 million of which were cardiac perfusion studies. In
1996, the median Health Care Finance Administration ("HCFA") reimbursement rate
for a nuclear cardiac exam was $850, excluding the cost of any preceding
echocardiogram.

    X-RAY ANGIOGRAPHY. Angiography is used to visualize real-time blood flow in
the body's vasculature in order to determine the presence of blockages or
occlusions in the vessels leading to the heart prior to performing bypass
surgery or balloon angioplasty. A catheter is inserted into a vessel or directly
into the heart chamber and a contrast agent that is visible using special x-ray
detection equipment is injected. This procedure requires a specially-equipped
laboratory. It is effective in locating blockages and occlusions, but it is
expensive, invasive, and exposes the patient to x-ray radiation. In 1996,
approximately 4.5 million angiographic examinations were performed in the United
States, with a median HCFA reimbursement rate for a heart angiogram and
catheterization procedure of approximately $2,000, excluding the cost of any
preceding echocardiogram.

ULTRASOUND IMAGING

    Ultrasound employs low-power, high-frequency sound waves which are directed
at the organ to be imaged by placing a generating instrument called a
"transducer" on the body near the organ. The sound waves are reflected off of
the organ or tissue back to the ultrasound machine. The ultrasound machine reads
the reflected sound waves and produces a cross-sectional real-time "moving
picture" image of the targeted organ. Ultrasound is used to image the heart,
liver, kidneys, gall bladder, pancreas, other abdominal structures, blood
vessels, and the reproductive system, and is also being investigated for use
with brain and breast examinations. Cardiac ultrasound examinations are called
"echocardiograms." Non-cardiac diagnostic ultrasound examinations are referred
to as "radiology" indications or applications. The advantages of ultrasound
include:

    -    PRICE. Ultrasound is a relatively inexpensive procedure. In 1994, the
         HCFA reimbursement rate for a typical echocardiogram was approximately
         $570, while that for a cardiac exam using nuclear imaging was
         approximately $850. A heart angiogram and catheterization cost
         approximately $2,000. The average cost of an ultrasound machine was
         $120,000, while the average cost of nuclear imaging equipment was
         approximately $450,000.


                                          5
<PAGE>

    -    LARGE INSTALLED BASE. There is a large installed base of ultrasound
         machines throughout the world. In 1995, there were approximately
         56,000 machines installed in the United States. Several large
         manufacturers such as Hewlett-Packard, ATL, Acuson and Toshiba compete
         in the ultrasound hardware market.

    -    REAL-TIME IMAGES. Unlike the other imaging modalities (with the
         exception of x-ray angiography), ultrasound creates a "moving picture"
         of the targeted organ. The organ under study may be safely examined
         over any period of time selected by the physician. This feature is
         especially important in heart examinations, where the dynamics of the
         beating heart are of diagnostic importance to the cardiologist.

    -    SAFETY. The sound waves employed by ultrasound have no noticeable
         medical effect on the body. The same organs or sections of the body
         may be imaged repeatedly for long periods of time with no adverse
         effects. Ultrasound is routinely used in fetal examinations.

    -    EASE OF USE.  Ultrasound exams are relatively simple to perform and
         require little patient preparation. Unlike machines used for MRI, CT,
         nuclear imaging and x-ray angiography, ultrasound machines are compact
         and mobile and do not require specially-equipped facilities or
         housing.

    Although ultrasound is a widely-used imaging modality, the visual clarity
of non-contrast-enhanced ultrasound images is generally inferior to that
obtainable using certain of the other modalities. With each of the other
modalities, contrast agents are frequently used, and in nuclear imaging and
x-ray angiography, an imaging agent is required to create the images. Until the
introduction of ALBUNEX-Registered Trademark-, no imaging agents were available
in the United States for use with ultrasound.

    "Conventional" ultrasound imaging sends and receives sound waves at a
single frequency; this is called the "fundamental" frequency. The Company's
products are being tested with new ultrasound techniques which, although
currently not widely available, may find acceptance in diagnostic imaging over
the next several years. The most significant of these new techniques is
"harmonic imaging." Researchers have discovered that if the ultrasound machine's
transducer is modified to read the sound waves returning from the imaged area at
a multiple ("harmonic") of the outgoing fundamental frequency, and if a contrast
agent is used, the resulting image can provide more complete information on
blood flow and structures in the scanned area than is available with a standard
ultrasound exam. This is because the microspheres generate a harmonic signal
significantly stronger than that generated by the tissue, resulting in a
significantly enhanced signal-to-noise ratio. Acuson's Sequoia-Registered
Trademark- system currently in use was designed to perform harmonic imaging.
Hewlett-Packard Company's Sonos 2500 LE is currently undergoing 510k review by
the Food and Drug Administration for its harmonic-imaging capabilities.

PRODUCTS AND MARKETS

ALBUNEX-Registered Trademark- AND OPTISON-TM- MICROSPHERE TECHNOLOGY

    Both ALBUNEX-Registered Trademark- and OPTISON-TM- are ultrasound contrast
imaging agents consisting of gas-filled human albumin microspheres manufactured
using MBI's proprietary process. They are injected into an arm vein and pass
through the bloodstream to the right atrium and ventricle of the heart, where
they are pumped through the lungs and into the left atrium and ventricle of the
heart. The left ventricle is the chamber of the heart that pumps oxygenated
blood arriving from the lungs out to the rest of the body and is the portion of
the heart that is of the greatest clinical interest in the diagnosis of heart
disease.

    ALBUNEX-Registered Trademark- microspheres are air-filled, while
OPTISON-TM- microspheres are filled with an insoluble gas, perfluoropropane. The
use of ALBUNEX-Registered Trademark- and OPTISON-TM- as ultrasound imaging
contrast agents relies on the greater acoustic reflectivity of the microspheres
relative to blood, which does not reflect sound waves well and is effectively
invisible to ultrasound imaging, and relative to the tissues to which the blood
carries the microspheres. Areas where ALBUNEX-Registered Trademark- or
OPTISON-TM- are present will appear brighter and clearer than areas where no
agent is present. The contrast effect between the blood containing the
microspheres and the surrounding tissues enhances the ability to detect


                                          6
<PAGE>

blood flow using ultrasound imaging and permits the resolution of subtle
differences in the density of the target tissue structures.

    ALBUNEX-Registered Trademark- consists of a 5% albumin solution (in saline)
in which the air-filled microspheres are suspended. Human albumin is a protein
extracted from human blood which has been used as a blood expander for many
years. ALBUNEX-Registered Trademark- is compatible with the human body and is
rapidly metabolized by the liver, and has been given to over 30,000 patients
worldwide with no clinically significant side effects. OPTISON-TM-, which uses a
1% albumin solution, has exhibited a safety profile in clinical studies
equivalent to that of ALBUNEX-Registered Trademark-.

ALBUNEX-Registered Trademark-

    ALBUNEX-Registered Trademark- is the first and only ultrasound contrast
imaging agent approved by the FDA. It was approved for marketing in the United
States in August 1994 for intravenous use to assess cardiac function in
suboptimal (diagnostically inconclusive) echocardiograms. ALBUNEX-Registered
Trademark- was approved for marketing in Japan in October 1993 and launched
shortly thereafter by Shionogi & Co., Ltd. ("Shionogi"). In February 1996 the
Committee for Proprietary Medicinal Products of the European Agency for the
Evaluation of Medicinal Products recommended the approval of ALBUNEX-Registered
Trademark- (as developed by MBI's former marketing partner Nycomed Imaging AS)
for marketing authorization in the European Union. See "Marketing and License
Agreements" and "Government Regulation."

    In 10-15% of the echocardiograms performed annually in the United States,
the location of the wall of the left ventricle, or "endocardial border," cannot
be satisfactorily visualized or its location appears ambiguous. When sufficient
numbers of ALBUNEX-Registered Trademark- microspheres reach the left ventricle,
the acoustical reflectivity of ALBUNEX-Registered Trademark- in the chamber
permits the endocardial border to be seen by defining the walls of the chamber,
or "endocardial border delineation." This delineation in turn permits
visualization of the movement of the walls of the chamber as the heart beats, or
"regional wall motion." Information regarding endocardial border delineation and
regional wall motion are important for diagnostic purposes. If the chamber walls
appear thicker than normal or are not moving normally, it is a potential
indicator that the surrounding heart muscle is not receiving sufficient blood or
is abnormal in some other way, which, in turn, may indicate an infarction (heart
attack), stenosis (partial blockage of an artery) or other abnormal condition.

STRESS ECHO.  ALBUNEX-Registered Trademark- is effective in assessing
endocardial border definition and regional wall motion in only approximately 60%
of patients with cardiovascular disease and other cardiac conditions when
administered under resting conditions. The Company believes that
ALBUNEX-Registered Trademark- improves the assessment of cardiac function in a
significantly greater percentage of patients in "stress echo" exams. A "stress
echo" exam is an echocardiogram in which the patient is subjected to a treadmill
or other stimulus that increases his or her heart rate. The Company believes
that the enhanced efficacy of ALBUNEX-Registered Trademark- using stress echo is
explained by the faster passage of ALBUNEX-Registered Trademark- through the
lungs to the left ventricle in the course of a stress echo exam which allows
more ALBUNEX-Registered Trademark- microspheres to reach the heart chamber.

    FALLOPIAN TUBE PATENCY.  MBI and Mallinckrodt have identified fallopian
tube patency ("FTP") as a promising radiology application for ALBUNEX-Registered
Trademark-. Physicians attempting to diagnose female infertility must determine
whether the fallopian tubes are patent (open) or occluded (blocked). The two
primary procedures used to assess FTP are hysterosalpingography ("HSG") and
chromolaparoscopy. HSG involves the injection of an x-ray contrast agent or dye
into the uterus to allow observation and evaluation by x-ray of the flow through
the fallopian tubes.

    This procedure exposes the patient to radiation, which may cause an adverse
reaction, and also frequently requires sedation or anesthesia. If HSG is
inconclusive, a chromolaparoscopy may be ordered. This procedure exposes the
patient to the risk of bleeding, infection, injury to internal structures, and
reaction to the anesthetic.

    ALBUNEX-Registered Trademark- may permit the use of ultrasound imaging to
assess FTP, potentially avoiding both surgery and the introduction of radiation
into the patient's reproductive system.  In February of 1997, Mallinckrodt
received unanimous recommendation for approval from the Radiology Device
Advisory Panel of the United States Food and Drug Administration for
ALBUNEX-Registered Trademark- for assessment of FTP. Mallinckrodt received an
approvable letter on March 20, 1997 from the FDA for ALBUNEX-Registered
Trademark- for the assessment of FTP.


                                          7
<PAGE>

OPTISON-TM-

    OPTISON-TM- consists of perfluoropropane-filled albumin microspheres of
approximately the same size and concentration as ALBUNEX-Registered Trademark-.
Because perfluoropropane is insoluble in blood, the microspheres in OPTISON-TM-
have greater durability and remain intact in the bloodstream for over 5 minutes,
versus 35 to 40 seconds for ALBUNEX-Registered Trademark-. This greater
durability permits more of the microspheres to pass from the right side of the
heart, through the microvasculature of the lungs, and into the left side of the
heart. As a result, OPTISON-TM- is superior to ALBUNEX-Registered Trademark- in
its ability to measure endocardial border delineation and regional wall motion
using ultrasound. More importantly, the durability of the OPTISON-TM-
microspheres allow them to circulate into the heart muscle and may permit the
assessment of myocardial perfusion using ultrasound.

    CARDIAC FUNCTION.  Clinical studies have demonstrated that OPTISON-TM- is 
more effective than ALBUNEX-Registered Trademark- in visualizing blood flow 
in the chambers of the heart, including the delineation of endocardial 
borders and the assessment of regional wall motion. Clinical studies 
demonstrated a high success rate for this indication in cases of suboptimal 
chamber wall imaging in both stressed and non-stressed patients. OPTISON-TM- 
has demonstrated efficacy at a much lower dose than is required for 
ALBUNEX-Registered Trademark-, with an equivalent safety profile. The Company 
received an unconditional recommendation for approval from the Radiology 
Device Panel of the FDA for OPTISON-TM-.

    MYOCARDIAL PERFUSION.  Clinical studies indicate that the longer
circulation time of the perfluoropropane-filled microspheres in OPTISON-TM-
allows a physician to assess myocardial perfusion using ultrasound. The Company
conducted a Phase 1 safety study which demonstrated a safe dosing range of many
times the expected efficacious dose and also showed myocardial perfusion in
healthy patients using a dose as low as 0.5 cc, versus 10-20 cc for an
efficacious dose of ALBUNEX-Registered Trademark- to assess cardiac function.
Analysis of Phase 2 results indicated a 92% concordance between diagnoses of
patients with known or suspected heart disease made using dipyridamole-stress
nuclear imaging, the current perfusion "gold standard," and dipyridamole-stress
harmonic ultrasound imaging using OPTISON-TM-. The Company's remaining Phase 2
and future Phase 3 studies will be designed to evaluate, among other things,
myocardial perfusion in cardiac patients using ultrasound at both fundamental
and harmonic frequencies.

    Myocardial perfusion is important because it provides oxygenated blood to
the heart muscle. If OPTISON-TM- is not detected in a portion of the heart
muscle, or not detected with the expected level of intensity, it means that a
portion of the muscle is not receiving enough blood ("ischemia"). This finding
may be diagnostic of several conditions, including coronary arterial stenosis
and myocardial infarction.

    The ability rapidly to assess the condition of the heart using OPTISON-TM-
may also prove efficacious and cost-effective in the emergency room and in the
subsequent treatment of heart attacks. For example, a patient arriving at the
emergency room complaining of chest pain may be quickly assessed using
ultrasound with OPTISON-TM-. If no perfusion defect is seen in the heart, a
myocardial infarction may be ruled out. Where a perfusion defect is detected
using OPTISON-TM-, the Company believes that information regarding its severity,
size and location may assist the physician in determining the patient's
condition. A patient with an extensive infarction may be sent immediately for an
angiogram and even emergency angioplasty. A patient with a less severe
infarction may be given a thrombolytic (clot-dissolving) agent. This patient may
then undergo an additional OPTISON-TM- echocardiogram to see whether the
affected area of the heart muscle has reperfused; that is, whether the
thrombolytic agent was successful in treating the condition. If the OPTISON-TM-
echocardiogram shows that the muscle has reperfused, the physician would not
have to order any additional emergency procedures and conventional treatment
might begin. Subsequent OPTISON-TM- echocardiograms may be used to assess the
effectiveness of the post-emergency-room treatment; for example, how the heart
muscle has responded to different medications, changes in diet, exercise
program, weight loss and other therapies.

    The Company believes that the assessment of myocardial perfusion may also
be important in screening high-risk patients prior to general surgery or other
potentially stressful treatment regimens. For example, a surgeon may wish to
assess whether an elderly or weakened patient is capable of surviving the
particular surgery or treatment without a cardiac incident. An OPTISON-TM-
echocardiogram may be safely administered to assist the physician in making this
determination.


                                          8
<PAGE>

    Commercialization of OPTISON-TM- for myocardial perfusion may require the
conversion of present ultrasound equipment to harmonic imaging frequencies.
Although the Company is aware of efforts to develop commercial harmonic modules
for attachment to existing ultrasound machines as well as efforts to develop new
harmonic imaging machinery by several hardware manufacturers, there can be no
assurance that any of these current efforts will be successfully commercialized.

    RADIOLOGY INDICATIONS.  The stability of the OPTISON-TM- microspheres
renders the product potentially suitable for a much greater range of indications
than ALBUNEX-Registered Trademark-. In preclinical studies, OPTISON-TM- has been
shown to perfuse the liver, permitting the detection of tumors and lesions using
ultrasound. Preliminary animal studies have shown OPTISON-TM- is able to perfuse
the kidneys, ovaries, prostate, testes and peripheral intracranial vessels.
Clinical studies are planned to evaluate the use of OPTISON-TM- in the detection
of liver pathology relative to the current imaging "gold standard" for analyzing
liver pathology.

    OPTISON-TM- enjoys several other potential advantages. In clinical studies,
OPTISON-TM- has achieved greater efficacy at a fraction of the dose of
ALBUNEX-Registered Trademark- required for the assessment of cardiac function.
The Company expects that this low dosage will make OPTISON-TM- attractive to the
patient as well as the doctor. In addition, OPTISON-TM- uses a 1% albumin
solution, compared to a 5% albumin solution required for ALBUNEX-Registered
Trademark-. The lower dose required and the lesser amount of albumin used may
lower MBI's per-unit manufacturing cost and may allow for the production of more
doses of OPTISON-TM- than ALBUNEX-Registered Trademark- using equivalent
manufacturing capacity. The stability of the OPTISON-TM- microsphere also makes
the product easier to manufacture than ALBUNEX-Registered Trademark-.

ORALEX-Registered Trademark-

    The Company is developing ORALEX-Registered Trademark-, an oral ultrasound
contrast agent intended to enhance images of the abdomen, including the small
bowel, stomach lining and structures adjoining the stomach, in particular the
pancreas.

    Gas in the stomach interferes with ultrasound images of the abdominal area
by reflecting nearly all of the sound waves. If the ultrasound "noise" caused by
this gas can be removed, the stomach wall can be more effectively visualized and
the stomach itself can become an "acoustic window" to organs next to it which
are difficult to visualize, such as the pancreas. ORALEX-Registered Trademark-
is a polydextrose solution which is administered orally and which may displace
gas in the stomach for up to 30 minutes. This period of displacement could be
sufficient to permit effective ultrasound imaging. The Company is evaluating the
use of ORALEX-Registered Trademark- to make ultrasound imaging as useful for
diagnostic purposes as costlier and more complex procedures such as CT and more
invasive procedures such as endoscopy.

    The ability to view the pancreas is of particular interest to physicians
because pancreatic cancer is very difficult to detect at an early stage, and
current imaging modalities are not effective for this purpose. By the time
pancreatic cancer tumors are sufficiently large to be detected using CT, for
example, the cancer has progressed to the point where the patient's condition is
terminal. In 1993, there were approximately 25,000 deaths in the United States
from pancreatic cancer.

    ORALEX-Registered Trademark- is presently in a Phase 2 safety and efficacy
study. This study, which is expected to be completed by the end of 1997 is
designed to evaluate the use of ORALEX-Registered Trademark- for the
visualization of the stomach lining and the early detection of pancreatic
disease. An earlier Phase 1 study did not reveal any clinically significant side
effects.

    The Company is seeking a marketing and development partner for
ORALEX-Registered Trademark-. Because of the Company's primary commitment to
ALBUNEX-Registered Trademark- and OPTISON-TM-, it has determined that it will
begin Phase 3 clinical trials for ORALEX-Registered Trademark- only when it has
found a collaborative partner to fund a significant portion of the necessary
clinical and regulatory activities.


                                          9
<PAGE>

OTHER RESEARCH AND DEVELOPMENT

    The Company's research and development activities seek improvements to
existing products and development of new contrast agents. The Company also
continues to develop process improvements to secure the efficient supply of its
products for developmental and commercial use.

    The Company has identified a non-ultrasound imaging agent employing
iodinated triglycerides ("ITG") to target hepatocytes (liver cells) to provide a
site-specific contrast agent for CT, which is not effective in identifying the
very early stages of liver cancer even with the use of traditional iodinated
x-ray contrast agents. The Company believes that ITG may have the potential to
be a contrast agent that would make consistent early identification by CT
possible. The Company holds an exclusive license from the University of Michigan
for patents relating to the ITG technology which requires the Company to
exercise diligence in the development and commercialization of ITG. In view of
this contractual requirement, if the Company does not enter into a collaborative
development relationship with a partner and determines that it will no longer
invest its own resources in the development of ITG, the Company's license from
the University of Michigan will terminate. At present, the Company continues to
develop the product and is actively pursuing a marketing and development
partner.

MARKETING AND LICENSE AGREEMENTS

    MALLINCKRODT MEDICAL, INC.  MBI's distribution agreement with Mallinckrodt
forms the basis of its product development and marketing program for
ALBUNEX-Registered Trademark- and OPTISON-TM-.

    In December 1988, the Company entered into a distribution agreement with
Mallinckrodt granting it the exclusive marketing and distribution rights for
ALBUNEX-Registered Trademark- and gas-filled albumin microspheres in North and
South America. Mallinckrodt paid the Company $6.0 million and agreed to pay the
Company a further $21.0 million based on the successful completion of certain
product development and regulatory milestones. Mallinckrodt also paid the
Company $3.0 million for 181,818 unregistered shares of the Company's Common
Stock. Under the distribution agreement, the Company is responsible for
conducting clinical trials and securing regulatory approvals of the licensed
products in the United States for cardiac indications, and Mallinckrodt is
responsible for conducting clinical trials and securing regulatory approvals in
the United States for non-cardiac indications and is responsible for conducting
all clinical trials and securing approvals in the other countries in
Mallinckrodt's territory. The Company manufactures all licensed products for
sale to Mallinckrodt at a price generally equal to 40% of Mallinckrodt's
quarterly average selling price to end users. If the Company declines to
manufacture ALBUNEX-Registered Trademark- or OPTISON-TM- for Mallinckrodt
because the quarterly average selling price falls below a level specified in the
Company's distribution agreement with Mallinckrodt or the proposed initial price
in a new market or for a new indication is below the specified level, or if the
Company is unable to manufacture ALBUNEX-Registered Trademark- or OPTISON-TM- in
sufficient quantities to satisfy Mallinckrodt's orders on a timely basis,
Mallinckrodt may exercise certain contingent manufacturing rights. MBI will
receive a royalty of 5-10% on Mallinckrodt's sales of ALBUNEX-Registered
Trademark- or OPTISON-TM- which Mallinckrodt has manufactured. The distribution
agreement lasts for the life of the licensed patents and, prior to amendment in
September 1995, granted Mallinckrodt exclusive rights for five years following
the first commercial sale of ALBUNEX-Registered Trademark- in the United States,
after which MBI was granted the assignable right to co-market the licensed
products. In accordance with the distribution agreement, the Company undertook
to acquire license rights from a third party to a United States patent for
certain related technology. The Company acquired these rights in February 1991,
and in connection with this acquisition the Company and Mallinckrodt agreed to
pay royalties to the licensor of 0.8% and 1.2%, respectively, on the net sales
of ALBUNEX-Registered Trademark- in the United States.

    The Company's relationship with Mallinckrodt was strengthened and expanded
in September 1995 when the parties entered into an Amended and Restated
Distribution Agreement ("ARDA"). ARDA expands the geographic scope of
Mallinckrodt's exclusive right to market the licensed products to include all of
the countries of the world other than those covered by the Company's then
existing license agreements with Shionogi and Nycomed and extends the duration
of Mallinckrodt's exclusive rights to the later of July 1, 2003 or three years
after the date that the Company obtains approval from the FDA to market
OPTISON-TM- for an intravenous myocardial perfusion indication. Mallinckrodt
agreed to pay the Company $20.0 million over four years beginning in October
1995 to support clinical trials of OPTISON-TM-,


                                          10
<PAGE>

related regulatory submissions and associated product development and to pay up
to an additional $14.5 million upon the satisfaction of certain territorial and
product development milestones.

    ARDA requires the Company to spend at least $10.0 million for clinical 
trials to support regulatory filings with the FDA for cardiac indications of 
OPTISON-TM-. The Company's expenditures will be made in accordance with the 
directions of a joint steering committee which the Company and Mallinckrodt 
have established in order to coordinate the development and regulatory 
approval of OPTISON-TM-.

    Under a related investment agreement, Mallinckrodt purchased 1,118,761 
shares of the Company's Common Stock for $13.0 million at a premium of 40% 
above the then-prevailing market price. In addition, ARDA grants the Company 
the option to repurchase all of the shares of the Company's Common Stock that 
Mallinckrodt purchased under the related investment agreement for $45.0 
million, subject to various price adjustments. This option is exercisable 
from the later of July 1, 2000, or the date that the FDA approves OPTISON-TM- 
for a myocardial perfusion indication, through the later of the third 
anniversary of such approval or June 30, 2003. If the Company exercises this 
option, the Company or its assignee may co-market licensed products in all of 
the countries covered by ARDA.

    In December 1996, the Company and Mallinckrodt amended ARDA to expand the
geographical scope of Mallinckrodt's exclusive marketing and distribution rights
for ALBUNEX-Registered Trademark-, OPTISON-TM- and related products.  The
amendment extended Mallinckrodt's exclusive territory to include the territory
that the Company had formerly licensed to Nycomed consisting of Europe, Africa,
India and parts of Asia. Under the amendment to ARDA, Mallinckrodt agreed to pay
fees of up to $12.9 million plus 40 percent of product sales to cover royalties
and manufacturing.  Mallinckrodt made an initial payment of $7.1 million,
consisting of reimbursement to the Company of $2.7 million that the Company paid
to Nycomed to reacquire the exclusive product rights in Nycomed's territory,
payment of $3 million to the Company under the terms of ARDA upon the extension
of Mallinckrodt's exclusive rights to Nycomed's former territory, and payment of
$1.4 million to Nycomed in satisfaction of the Company's obligation to pay 45%
of any amounts that the Company receives in excess of $2.7 million upon the
licensing of the former Nycomed territory to a third party.  Of the remaining
$5.8 million that may be paid, Mallinckrodt will pay $4 million to the Company
(upon the achievement of the specified product development milestone) and $1.8
million to Nycomed (representing 45% of the $4 million payment to the Company).
There can be no assurance, however, that this milestone will be satisfied.

    SHIONOGI & CO., LTD.  In March 1989, the Company entered into a license and
cooperative development agreement with Shionogi, of Osaka, Japan. Under this
agreement, the Company granted Shionogi exclusive marketing and distribution
rights for ALBUNEX-Registered Trademark- and other gas-filled albumin
microsphere products in Japan, Taiwan and South Korea. Shionogi paid the Company
$10.0 million and agreed to pay a further $21.0 million (of which $13.0 million
had been paid as of March 31, 1996) over the next several years based on
Shionogi's successful completion of certain product development and regulatory
milestones.  In September 1996, the Company and Shionogi entered into an
agreement pursuant to which the Company reacquired all product rights from
Shionogi.  Under this agreement, which also settled pending claims by the
parties against each other, the Company paid $3 million to Shionogi and will pay
an additional $5.5 million over the next three years.  See "Item 3 -- Legal
Proceedings."

    NYCOMED IMAGING AS.  In December 1987, the Company entered into a license
agreement with Nycomed's predecessor, Nycomed AS, of Oslo, Norway. Under this
agreement, the Company granted Nycomed exclusive developmental, manufacturing,
and marketing rights for ALBUNEX-Registered Trademark- and other gas-filled
albumin microsphere ultrasound imaging agents in the territory comprising
Europe, the former Soviet Union, Africa and the Middle East. India was later
added to this territory. While Nycomed performed substantial manufacturing and
clinical development work on ALBUNEX-Registered Trademark- (called "Infoson" by
Nycomed), the Company and Nycomed concluded that their respective strategic
interests were best served by the Company's reacquisition of Nycomed's product
rights, and in October 1995 the parties entered into an amendment of their
agreement that effectively returned these rights to the Company. The Company
agreed to pay Nycomed $2.7 million plus 45% of any amounts in excess of $2.7
million that the Company receives in payment for the transfer of marketing
rights in the former Nycomed territory to a third party. The Company also agreed
to pay Nycomed a royalty of 21/2% on the first $30.0 million of annual sales of
licensed products and 31/2% on any annual sales in excess of $30.0 million.


                                          11
<PAGE>

    FEINSTEIN LICENSE. In November 1986, the Company entered into a license
agreement under which it acquired the exclusive right to develop, use and sell
any products derived from patents and applications owned by Stephen B.
Feinstein, M.D. covering sonicated gas-filled albumin microspheres used for
imaging and any future related patents and applications. In June 1989, this
agreement was restructured. The Company paid the licensor $4.5 million as an
additional license fee and $2.0 million as a prepayment of royalties to be
earned on the first $66.7 million of sales of the licensed products in the
United States, and the royalty rate on sales of licensed products was reduced
from 6% to 3% on worldwide net sales by the Company (and United States sales by
a sublicensee) and from 21/2% to 11/4% on net sales by sublicensees outside of
the United States. Under the restructured agreement, the Company is required to
pay minimum royalties each year, increasing from $100,000 in 1994 to $600,000 in
1999 and subsequent years.

    ITG AGENT. In November 1991, the Company entered into an exclusive license
agreement with the University of Michigan for certain patents relating to the
Company's ITG CT agent under development. The Company paid a license fee of
$20,000 and pays an annual license maintenance fee of $15,000. The Company
agreed to pay a royalty of from 21/2% to 6% on net sales of licensed products,
depending upon the jurisdiction and status of the particular product, and also
agreed to make annual minimum royalty payments increasing from $25,000 to
$150,000.

PATENTS AND TRADEMARKS

    The Company considers the protection of its proprietary technologies to be
material to its business prospects. The Company pursues a comprehensive program
of patent and trademark prosecution for its products both in the United States
and in other countries where the Company believes that significant market
opportunities exist.

    The Company has an exclusive license to certain United States and foreign
patents relating to gas-filled sonicated albumin microspheres from Steven B.
Feinstein, M.D. See "Business - Marketing and Licensing Agreements - Feinstein
License."  The Company itself owns additional United States and foreign patents
covering ALBUNEX-Registered Trademark- that broaden the product coverage of its
license. Certain of these additional patents cover the Company's continuous flow
sonication manufacturing process. The European equivalents of these
manufacturing patents were challenged in an opposition proceeding brought by
Andaris Ltd. which was decided in the Company's favor in January 1996. Andaris
has appealed the decision.  Andaris has also filed an opposition against the
Company's ALBUNEX-Registered Trademark- composition patent in Europe, and
Andaris and two other parties have filed a similar opposition in Japan.  No
hearing date has been set in these latter two oppositions.


    The Company has also filed several United States and foreign patent
applications relating specifically to OPTISON-TM- and associated products. The
Company has received notices of allowances of certain of the United States
applications. The Company is not aware of any opposition proceedings relating to
its foreign applications.

    The Company has received a patent covering its method of manufacturing
gas-filled albumin microspheres using a milling process under development. The
Company believes that this process may be more reliable and efficient than the
sonication process that the Company currently uses. The Company has also
received patents on other perfluorocarbon-based technology.

    The Company owns a United States patent covering ORALEX-Registered
Trademark- and has several foreign applications pending. The Company has also
filed patent applications relating to several early-stage development products.
The Company is uncertain whether these applications will result in issued
patents or whether the covered products can or will be commercialized.

    The last-to-expire of the Company's key United States patents covering
ALBUNEX-Registered Trademark-and OPTISON-TM- expires in 2008, and subject to
the outcome of the oppositions previously described, the last-to-expire of the
Company's key European patents covering ALBUNEX-Registered Trademark- and
OPTISON-TM- expires in 2009. If patents issue on the Company's pending
applications, the Company's patent protection for OPTISON-TM- will be extended
beyond 2008 in the United States and beyond 2009 in Europe.  In the United
States, a patent issued on an application filed before June 8, 1995 is
enforceable for 17 years from the date of issuance or 20 years from the
effective date of filing, whichever is longer.  A patent issued


                                          12
<PAGE>

on an application filed on or after June 8, 1995 is enforceable for 20 years
from the effective date of filing.

    The patent position of medical and pharmaceutical companies is highly
uncertain and involves complex legal and factual questions.  There can be no
assurance that the Company will receive patents for all or any of the claims
included in its pending or future patent applications, that any issued patents
will provide the Company with competitive advantages or will not be challenged
by third parties, or that existing or future patents of third parties will not
have an adverse effect on the Company's ability to commercialize its products.
Moreover, there can be no assurance that third parties will not independently
develop similar products, duplicate one or more of the Company's products or
design around the Company's patents.

    The Company's commercial success also will depend in part upon the 
Company's not infringing patents issued to third parties.  There can be no 
assurance that patents issued to third parties will not require the Company 
to alter its products or manufacturing processes, pay licensing fees, or 
cease development of its current or future products.

    Litigation or administrative proceedings may be necessary to enforce the 
Company's patents, to defend the Company against infringement claims or to 
determine the priority, scope and validity of the proprietary rights of third 
parties.  Any such litigation or administrative proceedings could result in a 
substantial cost to the Company, and an unfavorable outcome could have a 
material adverse effect on the Company's business, financial condition and 
results of operation. Moreover, there can be no assurance that, in the event 
of an unfavorable outcome in any litigation or administrative proceedings 
involving infringement claims against the Company, the Company would be able 
to license any proprietary rights that it requires on acceptable terms or at 
all.  The Company's failure to obtain a license that it requires to 
commercialize one of its products could have a material adverse effect on the 
Company's business, financial condition and results of operations.

    The Company has become aware of several United States patents issued to
other companies covering various attributes of perfluorocarbon-containing
imaging agents such as OPTISON-TM-.  Certain of these companies also are
pursuing foreign patent protection.  Some of these companies are developing or
may be developing ultrasound contrast imaging agents that would compete with
OPTISON-TM-.

    The patents and patent applications of these other companies involve a
number of complex legal and factual issues that are currently unresolved.  The
Company believes that there may be a substantial overlap among many of the
claims in their patents and that it is likely that there will be administrative
proceedings or litigation in the United States and abroad to adjudicate their
conflicting rights.  The Company believes that it could become a party to one or
more of these actions, which could take several years to conclude and could
result in a substantial cost to the Company.

    The Company believes that, for a variety of reasons, its commercialization
of OPTISON-TM- will not infringe any valid patent held by one of these other
companies.  Depending upon the particular patent claim, these reasons include
(i) differences between OPTISON-TM- and the subject of the claim, (ii) the
invalidity of the claim due to the existence of prior art, (iii) the inadequacy
of the claim's specifications and (iv) lack of enablement.  The Company intends
to challenge the validity of any such patent granted to one of the other
companies if the patent is asserted against the Company, and the Company will
enforce its own patents if any product of one of the other companies infringes
the Company's patent claims.

    If any patent granted to one of the other companies is asserted against the
Company, litigation or administrative proceedings may be necessary to defend the
Company against infringement claims or to determine the priority, scope and
validity of the other company's proprietary rights.  Any such litigation or
administrative proceedings could result in a substantial cost to the Company;
and given the complexity of the legal and factual issues, the inherent
vicissitudes and uncertainty of litigation, and other factors, there can be no
assurance of a favorable outcome.  An unfavorable outcome could have a material
adverse effect on the Company's business, financial condition and results of
operations.  Moreover, there can be no assurance that, in the event of an
unfavorable outcome, the Company would be able to obtain a license to any
proprietary rights that may be necessary to commercialize OPTISON-TM-, either on
acceptable terms or at all.  If the Company were required to obtain a license
necessary to commercialize OPTISON-TM-, the Company's failure or


                                          13
<PAGE>

inability to do so would have a material adverse effect on the Company's
business, financial condition and results of operations.

    The Company has obtained registered trademarks for "ALBUNEX" and "ORALEX"
in the United States and in various foreign countries.  Additionally Malinckrodt
has filed for a trademark for "OPTISON".  There can be no assurance that the
Company's registered or unregistered trademarks and trade names will not
infringe on the proprietary rights of third parties.

    The Company also relies on unpatented trade secrets, proprietary know-how
and continuing technological innovation which it seeks to protect by, in part,
confidentiality agreements with its employees, consultants, investigators and
others. There can be no assurance that these agreements will not be breached,
that the Company would have an adequate remedy for any breach or that the
Company's trade secrets or know-how will not otherwise become known or
independently discovered by third parties.

MANUFACTURING

    The Company manufactures ALBUNEX-Registered Trademark- for commercial sale
in the United States and Japan in its aseptic plant at its  principal San Diego
facility. The plant employs the Company's patented continuous-flow sonication
process in which air is introduced to the sterile albumin solution and the
mixture is subjected to high-energy sound waves. This treatment denatures the
albumin protein and facilitates a process known as "cavitation" in which the
stable air-filled microspheres are created. The Company believes that its
current facilities will provide sufficient production capacity for
ALBUNEX-Registered Trademark- for the foreseeable future. The Company has also
completed construction of additional capacity at its aseptic plant for the
production of OPTISON-TM- and believes that this new facility will provide
production capacity for the foreseeable future.

    The Company has been able to meet all orders for ALBUNEX-Registered
Trademark- received to date from Mallinckrodt. Although occasional production
difficulties have been experienced, the Company believes these difficulties to
be typical of the startup commercial-scale manufacture of any new product,
especially one that relies on aseptic processes. The Company believes that its
manufacturing reliability will continue to improve and that it will not
experience any significant difficulty in manufacturing ALBUNEX-Registered
Trademark- in compliance with the FDA's Good Manufacturing Practices.

    The Company is also developing a method of manufacturing gas-filled albumin
microspheres using a milling process. The Company believes that this process may
be more reliable and efficient than the sonication process that it presently
uses. The milling process is in an early stage of development, and there can be
no assurance that the process will be successfully developed, that it can be
successfully integrated with the Company's operations, or that the FDA will
approve the process.

    The Company currently manufactures ORALEX-Registered Trademark- in a
pilot-scale plant at one of the Company's San Diego facilities. The Company
believes that this plant will be capable of supplying sufficient quantities of
the product for all future clinical trials.

COMPETITION

    In general, competition in the field of contrast agents is based on such
factors as product performance and safety, product acceptance by physicians,
patent protection, manner of delivery, ease of use, price, distribution and
marketing. The Company's products compete or may compete with new or improved
contrast agents.

    The Company anticipates that it will face increased competition in the
future as new products enter the market and advanced technologies become
available. The Company expects to compete against a number of companies, many of
which have substantially greater financial, technical and human resources than
the Company and may be better able to develop, manufacture and market products.
In addition, many of the Company's existing or potential competitors have
extensive experience in research, preclinical testing and human clinical trials,
obtaining FDA and other regulatory


                                          14
<PAGE>

approvals, and manufacturing and marketing their products, or are allied with 
major pharmaceutical companies that can afford them these advantages. As a 
result, competitors may develop and introduce competitive or superior 
products more rapidly than the Company. While the Company was the first to 
obtain FDA approval of an ultrasound contrast agent, ALBUNEX-Registered 
Trademark-, the Company expects that one or more of these competitors will 
develop products that will be approved for an indication or indications 
covered by ALBUNEX-Registered Trademark- or OPTISON-TM-, including the 
assessment of cardiac function and myocardial perfusion. One or more of these 
products may prove superior to the Company's products or may be approved for 
sale prior to the approval for sale of OPTISON-TM-. There can be no assurance 
that existing products or new products developed by the Company's competitors 
will not be more effective than any products that may be developed by the 
Company. Competitive products may render the Company's technology and 
products obsolete or noncompetitive.

    Any product developed by the Company that gains regulatory approval will
have to compete for market acceptance and market share. An important factor in
such competition may be the timing of market introduction of competitive
products. Accordingly, the relative speed with which the Company can develop
products, complete clinical testing and the regulatory approval process, gain
reimbursement acceptance and supply commercial quantities of the product for
distribution to the market are expected to be important competitive factors. In
addition, the Company believes that the primary competitive factors in the
market for ultrasound imaging agents are safety, efficacy, ease of delivery,
reliability, innovation and price. The Company also believes that physician
relationships and customer support are important competitive factors.

GOVERNMENT REGULATION

    The Company's diagnostic products are subject to substantial regulation by
the FDA and comparable agencies in foreign countries. Pursuant to the federal
Food, Drug and Cosmetic Act, as amended, and the regulations promulgated
thereunder, the FDA regulates the research, development, clinical testing,
manufacture, labeling, distribution and promotion of medical products.
Noncompliance with applicable requirements can result in, among other things,
fines, injunctions, civil penalties, recall or seizure of products, total or
partial suspension of production, refusal by the FDA to review premarket
approval applications ("PMA"), withdrawal of marketing approvals, a
recommendation by the FDA that the Company not be permitted to enter into
government contracts, and criminal prosecution.

    In the United States, medical devices are classified into one of three
classes (Class I, II, or III) based on the controls deemed necessary by the FDA
reasonably to assure their safety and efficacy. ALBUNEX-Registered Trademark-
and OPTISON-TM- have been classified as Class III devices, which means that they
must receive extensive premarketing review in which their safety and efficacy
will be evaluated, followed by formal approval by the FDA. There can be no
assurance that the FDA will continue to classify ALBUNEX-Registered Trademark-
and OPTISON-TM- as devices rather than as drugs.  See "Item 3 - Legal
Proceedings."

    On April 14, 1997, three lawsuits were filed by Bracco Diagnostics, Inc.,
DuPont Merck Pharmaceutical Co., ImaRx Pharmaceutical Corp. and Sonus
Pharmaceuticals, Inc. against the United States Food and Drug Administration
(the "FDA") seeking a preliminary and permanent injunction to keep the FDA from
approving the Company's pre-market approval application ("PMA") for OPTISON-TM-.
The lawsuits allege that the FDA acted in an arbitrary and capricious manner in
its review of the parties' ultrasound contrast agents and requested the FDA to
review all ultrasound contrast agents in a consistent manner.

    On April 21, 1997, United States District Court Judge Paul L. Friedman of
the United States District Court for the District of Columbia entered an order
enjoining the FDA from continuing any approval or review procedures relating to
the Company's PMA for OPTISON-TM-, the Company's second-generation contrast
agent for cardiac ultrasound imaging, until 10 days after the FDA resolves the
merits of citizen petitions previously filed with the FDA by the plaintiffs.
These citizen petitions requested the FDA to regulate all ultrasound imaging
contrast agents either as drugs (as the plaintiff's contrast agents under
development are currently classified) or as medical devices (as the Company's
ALBUNEX-Registered Trademark- and OPTISON-TM- are currently classified).  On
February 24, 1997, the FDA's advisory Radiological Devices Panel had recommended
approval of the Company's PMA for OPTISON-TM-.  As described in Judge Friedman's
opinion


                                          15
<PAGE>

accompanying his order, the purpose of the order was to grant "a limited
injunction to preserve the status quo pending a decision by the FDA as to how to
treat all ultrasound contrast agents, whether as medical devices or as drugs, or
to provide a rational explanation for the different treatment of the products at
issue".  Judge Friedman's order thus identically enjoins the FDA from continuing
any approval or review procedures relating to any of the plaintiff's respective
products until 10 days after the FDA resolves the merits of the plaintiff's
citizen petitions.

    The process of obtaining FDA approval of new products like
ALBUNEX-Registered Trademark-, OPTISON-TM-, and ORALEX-Registered Trademark-,
involves many steps. Results of laboratory and animal tests to determine
efficacy and safety, including potential toxicity, are submitted to the FDA as
part of an application for an investigational device exemption ("IDE") before
clinical trials on humans can begin. After completion of clinical trials, a PMA,
in the case of medical devices, must be submitted to the FDA for review and
approval before commercial marketing and sale may begin. In addition, a
supplement to a PMA, including supporting clinical data, is required before a
company may commercialize an approved medical device for a new indication.

    As Class III devices, ALBUNEX-Registered Trademark- and OPTISON-TM- are
required to undergo the PMA process. A PMA must be supported by valid scientific
evidence which typically includes extensive data, including preclinical and
human clinical trial data to demonstrate the safety and efficacy of the device.
If human clinical trials of a device are required, the sponsor of the trial is
required to file an IDE with the FDA prior to beginning human clinical trials.
The IDE application must be supported by data, typically including the results
of animal and laboratory testing. If the IDE application is approved by the FDA
and the appropriate institutional review boards, human clinical trials may begin
at a specific sites with a specific number of patients, as specified in the
approved protocol. An IDE supplement must be submitted to and approved by the
FDA before a sponsor or an investigator may make any change to the
investigational plan that may affect its scientific soundness or the rights,
safety or welfare of human subjects.

    In addition to the results of clinical trials, the PMA must also contain
the results of all relevant bench tests, laboratory and animal studies, a
complete description of the device and its components, and a detailed
description of the methods, facilities and controls used to manufacture the
device. In addition, the submission must include the proposed labeling,
advertising literature and any relevant training methods. Upon receipt of a PMA
application, the FDA makes a threshold determination whether the application is
sufficiently complete to permit a substantive review. If the FDA determines that
the PMA application is sufficiently complete to permit a substantive review, the
FDA will accept the application for filing. Once the submission is accepted for
filing, the FDA begins an in-depth review of the PMA. An FDA review of a PMA
application generally takes one to two years from the date that the PMA
application is accepted for filing, but may take significantly longer. The
review time is often significantly extended as a result of the FDA asking for
more information or for clarification of information already provided in the
submission. During the review period, an advisory committee, typically a panel
of clinicians, will likely be convened to review and evaluate the application
and provide recommendations to the FDA as to whether the device should be
approved. The FDA is not bound by the recommendations of the advisory panel.
Toward the end of the review process, the FDA generally will conduct an
inspection of the manufacturer's facility to ensure that the facilities are in
compliance with the applicable Good Manufacturing Practices ("GMP")
requirements.

    If the FDA's evaluations of both the PMA application and the manufacturing
facilities are favorable, the FDA will either issue an approval letter, or, in
some cases, an "approvable letter" containing a number of conditions which must
be met in order to obtain final approval of the PMA. When and if those
conditions have been fulfilled to the satisfaction of the FDA, the agency will
issue a PMA approval letter authorizing commercial marketing of the device for
the specified indications. If the FDA's evaluation of the PMA applications or
manufacturing facilities is not favorable, the FDA will deny approval of the PMA
application or issue a "not approvable" letter. The FDA may also determine that
additional clinical trials are necessary, in which case PMA approval could be
delayed for several years while additional clinical trials are conducted and
submitted in an amendment to the PMA. The PMA process can be expensive,
uncertain and lengthy, and a number of devices for which approval has been
sought by other companies have never been approved for marketing.

    Any devices manufactured or distributed by the Company pursuant to FDA
approvals are subject to pervasive and continuing regulations by the FDA and
certain state agencies. The FDA often requires device manufacturers, including
the Company in the case of ALBUNEX-Registered Trademark-, to conduct
postmarketing surveillance studies following PMA approval to


                                          16
<PAGE>

further evaluate the safety and effectiveness of the device. Foreign and
domestic regulatory approvals, if granted, may include significant limitations
on the indicated use for which the product may be marketed. In addition, the FDA
and certain foreign regulatory authorities impose numerous other requirements
with which medical device manufactures must comply. Product approvals could be
withdrawn for failure to comply with regulatory standards or as a result of the
occurrence of unforeseen safety or effectiveness problems following initial
marketing. The Company will also be required to adhere to applicable FDA
regulations setting forth current GMP requirements, which include testing,
control and documentation requirements. The Company is also required to register
with the FDA and with state agencies such as the California Department of Health
Services as a medical device manufacturer and to list its products with the FDA.
Ongoing compliance with GMP and other applicable regulatory requirements is
monitored through periodic inspections by state and federal agencies, including
the FDA, and by comparable agencies in other countries. Changes in existing
regulations or adoption of new regulations could prevent the Company from
obtaining, or affecting the timing of, future approvals or clearances.

    The FDA and equivalent foreign agencies have significant discretion in
their conduct of each stage of the regulatory process. Adverse decisions are
effectively unappealable, and agency delays are an unfortunate fact of life for
companies they regulate.

    The Company also intends to sell ALBUNEX-Registered Trademark- and
OPTISON-TM- in foreign countries. The time required to obtain approval for sale
in foreign countries may be longer or shorter than that required for FDA
approval, and the requirements may differ. In addition, there may be foreign
regulatory barriers other than premarket approval and the FDA must approve the
export of devices that require a PMA but are not yet approved domestically.
ALBUNEX-Registered Trademark- is currently approved for export to Japan.

    Labeling, advertising and other promotional activities are subject to
scrutiny by the FDA and in certain instances by the Federal Trade Commission.
The FDA actively enforces regulations prohibiting marketing of products for
unapproved uses, sometimes called "off-label" uses. The Company and its products
are also subject to a variety of state laws and regulations in those states or
localities where its products are or will be marketed. Any applicable state or
local regulations may hinder the Company's ability to market its products in
those states or localities.

    The Company is also subject to numerous federal, state and local laws
relating to such matters as safe working conditions, manufacturing practices,
environmental protection, fire hazard control and disposal of hazardous or
potentially hazardous substances. There can be no assurance that the Company
will not be required to incur significant costs to comply with such laws and
regulations now or in the future or that such laws or regulations will not have
a material adverse effect upon the Company's ability to do business.

    Changes in existing requirements or the adoption of new requirements or
policies could adversely affect the ability of the Company to comply with
regulatory requirements. Failure to comply with regulatory requirements could
have a material adverse effect on the Company's business, financial condition
and results of operations. There can be no assurance that the Company will not
be required to incur significant costs to comply with laws and regulations in
the future or that laws or regulations will not have a material adverse effect
on the Company's business, financial condition, or results of operations.

THIRD PARTY REIMBURSEMENT

    In the United States, the Company's products will be purchased primarily by
medical institutions which will then bill various third-party payors such as
Medicare, Medicaid and other government programs and private insurance plans. In
considering reimbursement for a new medical product, these payors must decide
both whether to cover the product and how much to pay for it.

    In general, to be covered by Medicare, a health care product or service
must be "reasonable and necessary" for the diagnosis or treatment of an illness
or injury. This requirement has been interpreted to mean that the product or
service must be safe and effective, not experimental or investigational (except
under certain limited circumstances involving devices furnished pursuant to an
FDA-approved clinical trial), and appropriate. Medicaid, Blue Cross and Blue
Shield


                                          17
<PAGE>

plans, commercial insurers and other third-party payors generally have
limitations on coverage that are similar to those of Medicare.

    Even if a device has received approval or clearance for marketing by the
FDA, there is no assurance that Medicare or other third-party payors will cover
the device or related services. Also, Medicare may place certain restrictions on
the circumstances in which coverage will be available. In making such coverage
determinations, the Health Care Financing Administration ("HCFA"), which
administers the Medicare program, and HCFA's contractors consider, among other
things, peer-reviewed articles concerning the safety and effectiveness of the
device, the opinions of medical specialty societies, and input from the FDA, the
National Institutes of Health, and other government agencies. There is no
assurance that the Company's products will be covered by Medicare and other
third-party payors.

    Failure by hospitals and physicians to receive what they consider to be
adequate reimbursement for procedures in which the Company's products are used
would have a material adverse effect on the Company's business, financial
condition and results of operations.

EMPLOYEES

    As of March 31, 1997, the Company had 140 full-time employees, including 7
officers.  Approximately 35 of the Company's employees were involved directly in
scientific research and development activities. Of these employees, 14 held
Ph.D. or M.D. degrees. The Company considers its relations with its employees to
be good, and none of its employees is a party to a collective bargaining
agreement.

ITEM 2.       PROPERTIES

    The Company's corporate offices and laboratory, manufacturing and warehouse
facilities occupy a total of 62,800 square feet in San Diego, California. The
Company owns a 44,000 square-foot building purchased in 1989 and leases an
additional 18,800 square-foot facility under an agreement expiring in October
1997. The Company has entered into a new lease commencing in October 1997 for
the space it currently occupies plus an additional 35,912 square feet (54,712
square feet total) expiring in September 2002. The Company anticipates that
these facilities will be sufficient to meet its needs into the foreseeable
future.

ITEM 3.       LEGAL PROCEEDINGS

    In February and March 1996, Shionogi, the Company's former marketing 
partner for ALBUNEX-Registered Trademark- and OPTISON-TM- in Japan, Taiwan 
and South Korea, and the Company respectively served each other with notices 
of breach of the MBI-Shionogi license and cooperative development agreement, 
and in early April 1996, Shionogi purported to terminate the agreement.  In 
April 1996, Shionogi filed a demand with the American Arbitration Association 
("AAA") for arbitration of Shionogi's claim for damages. The Company in turn 
filed a demand with AAA for arbitration of the Company's claims for 
compensatory and consequential damages.

    In September 1996, the Company and Shionogi entered into a settlement
agreement and mutual release ("Settlement Agreement"), whereby the parties
settled all the issues pending in the arbitration without an admission of
liability or fault by either party.  Under the terms of the Settlement
Agreement, the Company reacquired all of its rights to manufacture, market and
sell ALBUNEX-Registered Trademark- and OPTISON-TM- in the territory, consisting
of Japan, South Korea


                                          18
<PAGE>

and Taiwan previously licensed to Shionogi.  Pursuant to the Settlement
Agreement, the Company paid $3 million to Shionogi and will pay an additional
$5.5 million over the next three years.

    On April 14, 1997, three lawsuits were filed by Bracco Diagnostics, Inc.,
DuPont Merck Pharmaceutical Co., ImaRx Pharmaceutical Corp. and Sonus
Pharmaceuticals, Inc. against the United States Food and Drug Administration
(the "FDA") seeking a preliminary and permanent injunction to keep the FDA from
approving the Company's pre-market approval application ("PMA") for OPTISON-TM-.
The lawsuits allege that the FDA acted in an arbitrary and capricious manner in
its review of the parties' ultrasound contrast agents and requested the FDA to
review all ultrasound contrast agents in a consistent manner.

    On April 21, 1997, United States District Court Judge Paul L. Friedman of
the United States District Court for the District of Columbia entered an order
enjoining the FDA from continuing any approval or review procedures relating to
the Company's PMA for OPTISON-TM- until 10 days after the FDA resolves the
merits of citizen petitions previously filed with the FDA by the plaintiffs.
These citizen petitions requested the FDA to regulate all ultrasound imaging
contrast agents either as drugs (as the plaintiff's contrast agents under
development are currently classified) or as medical devices (as the Company's
ALBUNEX-Registered Trademark- and OPTISON-TM- are currently classified).  On
February 24, 1997, the FDA's advisory Radiological Devices Panel had recommended
approval of the Company's PMA for OPTISON-TM-.  As described in Judge Friedman's
opinion accompanying his order, the purpose of the order was to grant "a limited
injunction to preserve the status quo pending a decision by the FDA as to how to
treat all ultrasound contrast agents, whether as medical devices or as drugs, or
to provide a rational explanation for the different treatment of the products at
issue".  Judge Friedman's order thus identically enjoins the FDA from continuing
any approval or review procedures relating to any of the plaintiff's respective
products until 10 days after the FDA resolves the merits of the plaintiff's
citizen petitions.

ITEM 4.       SUBMISSION OF MATTERS TO A VOTE OF SECURITY HOLDERS

  None.

EXECUTIVE OFFICERS OF THE REGISTRANT

    The following information concerning the names, ages and titles of the
Company's executive officers as of the date of this report, is included in
accordance with General Instruction G(3) of Form 10-K:

    NAME                          AGE  POSITION

    Kenneth J. Widder, M.D. . .   44   Chairman of the Board
    Bobba Venkatadri. . . . . .   53   President and Chief Executive Officer
    Gerard A. Wills . . . . . .   40   Vice President, Finance, Chief Financial
                                       Officer
    James L. Barnhart, Ph.D . .   54   Vice President, Research
    Allan H. Mizoguchi, Ph.D. .   52   Vice President, Clinical and Quality
    William I. Ramage, D. Phil.   43   Vice President, Marketing
    Howard Dittrich, M.D. . . .   43   Vice President, Research/Medical &
                                       Regulatory Affairs

    As of March 31, 1997, Dr. Widder also served as the Company's Chief
Executive Officer and Mr. Venkatadri served as the Company's Chief Operating
Officer. The other officers held the offices as shown above.

         KENNETH J. WIDDER, M.D., a founder of the Company, has served as the
Company's Chairman of the Board and Chief Executive Officer since July 1981.
Prior to May 1997, Dr. Widder also served as the Company's Chief Executive
Officer. He currently serves as a director of Titan Pharmaceuticals, Wilshire
Technologies, and Digivision, Inc.


                                          19
<PAGE>

    BOBBA VENKATADRI has served as the Company's President and Chief Executive
Officer since May 1997.  He served as the Company's President and Chief
Operating Officer from October 1995 until May 1997.  Mr. Venkatadri served as
Executive Vice President of the Pharmaceutical Division of Centocor, Inc., from
September 1992 until he joined the Company, and as Vice President - Operations
of Centocor's Pharmaceutical Division from March 1992 to September 1992.  He was
employed by Warner-Lambert Company from 1967 until February 1992, most recently
serving as Senior Director, Pharmaceutical Operations, at its manufacturing
facility in Vegabaja, Puerto Rico.

    GERARD A. WILLS has served as the Company's Vice President - Finance and
Chief Financial Officer since January 1995.  He served as the Company's Chief
Financial Officer from August 1994 to January 1995 and as its Controller from
February 1993 to August 1994.  From 1990 until joining the Company in February
1993, Mr. Wills served as the Corporate Manager of Finance for Maxwell
Laboratories, Inc.  From 1986 through 1990, Mr. Wills was employed by Intermark,
Inc. where he last served as the Corporate Controller.

    JAMES L. BARNHART, PH.D., has served as the Company's Vice President -
Research since November 1996.  He served as the Company's Vice President of
Research and Development from October 1992 to November 1996 and as Director of
Research and Development from February 1988 to October 1992.  From 1979 until
joining the Company in February 1988, Dr. Barnhart was an Associate Adjunct
Professor at the Department of Radiology at the University of California, San
Diego School of Medicine in La Jolla, California.

    ALLAN H. MIZOGUCHI, PH.D., has served as the Company's Vice President -
Clinical Affairs and Quality Assurance since July 1994.  He joined the Company
in June 1989 as Director of Clinical Trials and served as its Director of
Clinical Research from April 1992 until February 1994 when he was appointed
Executive Director, Clinical Affairs and Quality Assurance.

    WILLIAM I. RAMAGE, D. PHIL., has served as the Company's Vice President -
Marketing since September 1996.  From 1979 to 1996, he was employed by DuPont
Merck Pharmaceutical Company where he served as Vice President of Business
Development and Customer Services of the Radiopharmaceutical Division from 1995
to 1996 and Director of Business Segments from 1994 to 1995.  From 1979 to 1994,
he served in other management positions with DuPont Merck in Billerica, MA,
Houston, TX and Wilmington, DE.

    HOWARD DITTRICH, M.D., has served as the Company's Vice President -
Research/Medical & Regulatory Affairs since November 1996.  He served as the
Company's Executive Director of Medical Affairs from May 1996 to November 1996.
He served as a Consultant to the Company from 1989 to 1996.  Dr. Dittrich was a
full-time faculty member of the University of California, San Diego, Department
of Medicine from 1984 to May 1996.  Currently, Dr. Dittrich practices part-time
with the University of California, San Diego where he holds an appointment as
Clinical Professor of Medicine.


                                          20
<PAGE>

                                       PART II

ITEM 5.  MARKET FOR REGISTRANT'S COMMON EQUITY AND RELATED STOCKHOLDER MATTERS

    The Company's Common Stock is traded on the New York Stock Exchange under
the symbol "MB."  As of May 1, 1997, there were approximately 2,102 holders of
record of the Company's Common Stock, representing approximately 9,273
beneficial owners.  The Company has not paid dividends on its Common Stock.  The
following table sets forth the quarterly high and low last sale price for a
share of the Company's Common Stock for the three fiscal years ended March 31,
1997, 1996, and 1995, respectively, as reported by the New York Stock Exchange.

FISCAL 1997                                            HIGH           LOW
                                                       ----           ---

First Quarter (4/1 to 6/30)                          11-7/8         8-1/2
Second Quarter (7/1 to 9/30)                          9-1/8         7-1/2
Third Quarter (10/1 to 12/31)                         8-3/4         6-1/2
Fourth Quarter (1/1 to 3/31)                         14-1/2             7

FISCAL 1996                                            HIGH           LOW
                                                       ----           ---

First Quarter (4/1 to 6/30)                               8         6-1/4
Second Quarter (7/1 to 9/30)                             10         6-1/4
Third Quarter (10/1 to 12/31)                         9-1/2             6
Fourth Quarter (1/1 to 3/31)                             10         6-3/8

FISCAL 1995                                            HIGH           LOW
                                                       ----           ---

First Quarter (4/1 to 6/30)                              18        10-7/8
Second Quarter (7/1 to 9/30)                         13-7/8         9-5/8
Third Quarter (10/1 to 12/31)                        14-1/8         9-1/8
Fourth Quarter (1/1 to 3/31)                         11-3/8             7


                                          21
<PAGE>

<TABLE>
<CAPTION>

ITEM 6.                         SELECTED FINANCIAL DATA

Selected Financial Data

FISCAL YEARS ENDED MARCH 31,                                1993           1994           1995           1996           1997
(In thousands, except per share data)

<S>                                                     <C>            <C>           <C>             <C>            <C>
Consolidated Statement of Operations Data:
Revenues:
 Revenues under collaborative
  agreements                                            $  3,439       $  5,713      $  15,132       $  2,412       $  4,500
 Product and royalty revenues                                  -          1,056          1,769            647            626
 License Fees                                                250          2,015             40             25          5,725
                                                        --------       --------       --------       --------       --------
  Total Revenues                                           3,689          8,784         16,941          3,084         10,851
Operating expenses:
 Research and development costs                           14,640         18,110         18,743         13,588          9,902
 Costs of products sold                                        -            580          1,608          1,553          4,748
 Selling, general and
  administrative expenses                                  4,863          5,743          5,864          5,862          8,052
 Other expense                                                 -          4,726          3,403          3,110          3,000
                                                        --------       --------       --------       --------       --------
  Total Expenses                                          19,503         29,159         29,618         24,113         25,702
Loss from operations                                     (15,814)       (20,375)       (12,677)       (21,029)       (14,851)
Interest expense                                            (340)          (327)          (694)          (786)          (810)
Interest income                                            3,144          1,902          1,189          1,102          2,377
(Provision) credit for income taxes                        1,197              -              -              -              -
                                                        --------       --------       --------       --------       --------
Income (loss) from continuing operations                 (11,813)       (18,800)       (12,182)       (20,713)       (13,284)
Loss from discontinued operations                         (2,255)             -              -              -
Net loss                                                $(14,068)       (18,800)      $(12,182)      $(20,713)      $(13,284)
                                                        --------       --------       --------       --------       --------
                                                        --------       --------       --------       --------       --------
Earnings (loss) per common share:
 Continuing operations                                  $  (1.01)      $  (1.58)      $  (1.02)      $  (1.62)      $  (0.78)
 Discontinued operations                                   (0.19)           -              -              -              -
 Net loss                                               $  (1.20)      $  (1.58)      $  (1.02)      $  (1.62)      $  (0.78)
                                                        --------       --------       --------       --------       --------
                                                        --------       --------       --------       --------       --------
Weighted average common
 shares outstanding                                       11,690         11,905         11,999         12,758         16,926

AS OF MARCH 31,                                             1993           1994           1995           1996           1997
- ---------------                                             ----           ----           ----           ----           ----

Consolidated Balance Sheet Data:
Cash, cash equivalents and
 marketable securities                                  $ 51,218       $ 29,500       $ 19,718       $ 20,570       $ 41,414
Working capital                                           51,761         28,117         20,927         18,601         43,843
Total assets                                              71,758         56,051         50,639         43,829         70,159
Long-term debt                                             3,965          3,917          8,408          8,610          7,349
Total stockholders' equity                                64,891         48,076         36,424         28,962         51,746

</TABLE>

                                          22
<PAGE>

ITEM 7.  MANAGEMENT'S DISCUSSION AND ANALYSIS OF FINANCIAL CONDITION AND
         RESULTS OF OPERATIONS

       (REFERENCES TO YEARS ARE TO THE COMPANY'S FISCAL YEARS ENDED MARCH 31.)

OVERVIEW

    Molecular Biosystems, Inc. ("MBI" or the "Company") is a leader in the
development, manufacture and sale of ultrasound contrast imaging agents. The
Company's contrast agents are designed to enhance existing ultrasound procedures
by improving their ability to image blood flow and by providing clearer images
of body structures and organs. ALBUNEX-Registered Trademark- the Company's
first-generation ultrasound contrast agent, was first approved for sale in Japan
in October 1993 and in the United States in August 1994 for the assessment of
cardiac function.

    While ALBUNEX-Registered Trademark- represents a major breakthrough in 
ultrasound imaging because it improves visualization of the left side of the 
heart, the potential markets for ALBUNEX-Registered Trademark- are limited 
because of the short duration of ALBUNEX-Registered Trademark- in the 
bloodstream. This short duration prevents the use of ALBUNEX-Registered 
Trademark- for the assessment of myocardial perfusion (blood flow in the 
heart muscle). OPTISON-TM-, the Company's second-generation ultrasound 
contrast agent, remains in the bloodstream for over 5 minutes versus 35-40 
seconds for ALBUNEX-Registered Trademark- As a result, OPTISON-TM- is 
superior to ALBUNEX-Registered Trademark- for the assessment of cardiac 
function.  More importantly, the enhanced duration of OPTISON-TM- in the 
bloodstream may permit the assessment of myocardial perfusion which the 
Company believes has a significantly greater market potential than cardiac 
function.  Accordingly, the Company is focusing its product development 
activities on OPTISON-TM-.

    In October 1996, the Company filed a Pre-Market Approval ("PMA") 
application for OPTISON-TM- with the U.S. Food and Drug Administration 
("FDA"). The application was accepted and in February 1997, the FDA's 
advisory Radiological Devices Panel recommended unconditional approval of the 
Company's PMA for OPTISON-TM-.  The FDA is currently enjoined from continuing 
any approval or review procedures relating to the Company's PMA until 10 days 
after the FDA resolves the merits of certain citizens petitions previously 
filed with the FDA by potential competitors of the Company.  Additionally, in 
March 1997 the Company received acceptance for its OPTISON-TM- Marketing 
Authorization application in the European Union.

    The Company is currently conducting Phase 2 clinical trials to evaluate 
the efficacy of OPTISON-TM- in determining whether the heart muscle is 
receiving an adequate blood supply ("myocardial perfusion"). Preliminary 
results indicate that OPTISON-TM-, when used in conjunction with harmonic 
imaging techniques, is as effective in assessing myocardial perfusion as 
nuclear imaging which is the current "gold standard". The Company is also 
conducting studies using OPTISON-TM- to detect abnormalities in other organs, 
such as the liver and kidneys.  The Company believes that the use of 
OPTISON-TM- in routine diagnostic as well as emergency room procedures may 
significantly reduce the overall cost of patient care by substituting 
ultrasound for more expensive diagnostic methods such as nuclear imaging and 
by enabling more accurate screening of patients to determine whether 
follow-up diagnostic or surgical procedures are required.

    Operating losses may occur for at least the next several years due to
continued requirements for research and development including preclinical
testing and clinical trials, regulatory activities and the costs of
commercializing new products. The magnitude of the losses and the time required
by the Company to achieve profitability are highly dependent on the market
acceptance of ALBUNEX-Registered Trademark- and the regulatory approval and
market acceptance of OPTISON-TM- and are therefore uncertain. There can be no
assurance that the Company will be able to achieve profitability on a sustained
basis or at all. Results of operations may vary significantly from quarter to
quarter depending on, among other things, the progress, if any, of the Company's
research and development efforts, the timing of milestone payments, the timing
of certain expenses and the establishment of collaborative research agreements.

REVENUE RECOGNITION

    Historically the Company has earned revenues from three sources: revenues
under collaborative agreements, product revenues and license fee revenues.


                                          23
<PAGE>

    REVENUES UNDER COLLABORATIVE AGREEMENTS.  Revenues under collaborative
agreements have been the primary source of revenues for the Company in the past.
They consist of three types of revenues: (i) milestone payments which are earned
on the achievement of certain product development and territorial milestones,
(ii) payments received from Mallinckrodt Medical, Inc. ("Mallinckrodt") under
the Company's Amended and Restated Distribution Agreement ("ARDA") to support
clinical trials, regulatory submissions and product development and (iii) 
bonus payments to the Company equivalent to Mallinckrodt's first year's sales 
of ALBUNEX-Registered Trademark- at Mallinckrodt's sales price to end users 
of the product.

    PRODUCT AND ROYALTY REVENUES.  Product revenues have been based upon 
MBI's sales to Mallinckrodt and Shionogi & Co., Ltd. ("Shionogi") and were 
recognized upon shipment of the product.  The transfer prices for MBI's sales 
of ALBUNEX-Registered Trademark- to Mallinckrodt and Shionogi were determined 
under the respective agreements and are equal to 40% of Mallinckrodt's net 
sales price to its end users of the product and 30% of Shionogi's net sales 
to its end users.  Royalty revenues are pursuant to a licensing agreement 
between the Company and Abbott Laboratories.

    LICENSE FEES.  License fees are recognized at the time of receipt and are
generally received in conjunction with the grant of product development,
marketing and/or distribution rights to one of the Company's technologies.

RESULTS OF OPERATIONS

    FISCAL YEAR 1997 COMPARED TO FISCAL YEAR 1996.  Revenues under
collaborative agreements were $4.5 million for the fiscal year ended March 31,
1997, compared to $2.4 million for the fiscal year ended March 31, 1996. This
increase was due to the receipt of 4 quarterly payments from Mallinckrodt to
support clinical trials versus 2 quarterly payments in the prior year. These
revenues in the current year consist solely of quarterly payments to support
clinical trials, regulatory submissions and product development received from
Mallinckrodt under the Company's amended agreement with Mallinckrodt which the
Company entered into in September 1995.

    Product and royalty revenues were $626,000 for fiscal year 1997, compared
to $647,000 for the prior year.  Product revenues are based on the Company's
sales to Mallinckrodt and Shionogi and are recognized upon shipment of the
product.  Royalty revenues are pursuant to a license agreement between the
Company and Abbott Laboratories.

    License fees were $5.7 million and $25,000 in fiscal year 1997 and 1996,
respectively.  The revenues in the current year consist of payments from
Mallinckrodt pursuant to the amendment to ARDA that the Company entered into
with Mallinckrodt in December 1996.  The amendment extended Mallinckrodt's
exclusive territory to include the territory that the Company had formerly
licensed to Nycomed Imaging AS ("Nycomed") consisting of Europe, Africa, India
and parts of Asia.

    Costs of products sold totaled $4.7 million for fiscal year 1997, 
resulting in a negative gross profit margin.  This negative gross profit 
margin was due to the fact that the current low levels of production are 
insufficient to cover the Company's fixed manufacturing overhead expenses. 
For the year ended March 31, 1996, costs of products sold totaled $1.6 
million. In fiscal 1996, certain expenses related to the development of the 
manufacturing process were recorded as research and development costs. 
Because the Company has left the pilot manufacturing phase, these costs are 
now classified as costs of goods sold. The Company anticipates an increase in 
gross profit margins if and when ALBUNEX-Registered Trademark- sales volumes 
increase and if and when OPTISON-TM-, the Company's second generation 
ultrasound imaging agent, receives regulatory approval and obtains market 
acceptance.  The increase in sales volume would permit the fixed costs 
included in manufacturing overhead to be allocated over a larger number of 
vials produced.  Manufacturing fixed costs are currently running at an annual 
rate of approximately $5 million.  The amount of any increase in the 
Company's margins and the time required by the Company to achieve higher 
margins are highly dependent on the regulatory approval and market acceptance 
of current and future products and are therefore uncertain.

    The Company's research and development costs totaled $9.9 million for the
year ended March 31, 1997 as compared to $13.6 million for the year ended March
31, 1996.  The decrease of 27% is due to the classification in fiscal year 1996
of certain expenses associated with the manufacturing of the product as research
and development costs as they represented the cost of developing the Company's
manufacturing process.


                                          24
<PAGE>

    Selling, general and administrative expenses totaled $8.1 million in fiscal
year 1997 as compared to $5.9 million in fiscal year 1996.  This increase is due
in part to increased litigation expenses related to the arbitration with
Shionogi. The increase is also due to increased compensation costs.

    During fiscal year 1997, the Company's other expenses totaled $3 million as
compared to $3.1 million for the prior year.  In December 1996, the Company and
Mallinckrodt amended ARDA to expand the geographical scope of Mallinckrodt's
exclusive marketing and distribution rights for ALBUNEX-Registered Trademark-,
OPTISON-TM- and related products. This amendment extended Mallinckrodt's
exclusive territory to include the territory the Company had previously licensed
to Nycomed.  As a result of the amendment, the Company recorded a one-time
charge of $3 million related to the reacquisition of its license rights from
Nycomed.  In fiscal year 1996, the Company recorded one-time charges related to
the conclusion of arbitration with Bracco S.p.A., the write off of license fees
associated with discontinued products and a write down to the sale price of two
buildings that were subsequently sold in March 1996.

    Interest expense for fiscal years 1997 and 1996 amounted to $810,000 and
$786,000, respectively. Interest expense consists of mortgage interest on the
Company's manufacturing building and interest related to a note payable which
bears interest at prime plus 1% and is payable in monthly installments of
principal plus interest over five years.  The interest rate on the note was
9.50% in March 1997.

    Interest income for fiscal year 1997 was $2.4 million compared to $1.1
million in fiscal year 1996. This significant increase is due to the interest
earned related to higher average cash balances and marketable securities
balances as a result of the Company's public offering in May 1996.

    No tax benefit has been recognized for fiscal 1997 or 1996 as the Company
had fully utilized its operating loss carryback ability in 1993. As of March 31,
1997, the Company had federal and state operating loss carryforwards of
approximately $84.4 million and $26.6 million, respectively.  Realization of
future tax benefits from utilization of net operating loss carryforwards is
uncertain.

    FISCAL YEAR 1996 COMPARED TO FISCAL YEAR 1995.  Revenues under
collaborative agreements were $2.4 million during the fiscal year ended March
31, 1996 as compared to $15.1 million for the fiscal year ended March 31, 1995.
This decrease was due primarily to non-recurring milestones earned in fiscal
year 1995 associated with receiving approval to market ALBUNEX-Registered
Trademark- in the United States and the release of ALBUNEX-Registered Trademark-
to Mallinckrodt's sales force. For fiscal year 1996, $2.0 million of the
revenues under collaborative agreements was attributable to the receipt of the
first two quarterly payments from Mallinckrodt to support clinical trials,
related regulatory submissions and associated product development (discussed
above under "Revenues Under Collaborative Agreements" and below under "Liquidity
and Capital Resources"). The remaining $412,000 for fiscal year 1996 was the
first year's sales bonus which Mallinckrodt agreed to pay to MBI.

    Product revenues were $647,000 for fiscal year 1996, compared to $1.8
million for the prior year. The majority of this decrease was due to greater
product shipments in the prior year as a result of receiving the initial
approval to market ALBUNEX-Registered Trademark- in the United States and the
initial release of the product to Mallinckrodt's sales force.

    License fees were $25,000 and $40,000 in fiscal year 1996 and 1995,
respectively. These fees were the result of a non-exclusive license entered into
in fiscal year 1993 granting rights for certain of the Company's patents which
it is no longer exploiting. The Company received an initial license fee of
$250,000 in fiscal year 1993 and continues to receive an annual license
maintenance fee.

    Cost of products sold totaled $1.6 million for fiscal year 1996, resulting
in a negative gross profit margin. This was due to the fact that the current low
levels of production were insufficient to cover the Company's fixed
manufacturing overhead expenses. For fiscal year 1995, cost of products sold
totaled $1.6 million, resulting in a gross profit margin of 9.1%. Prior to the
approval of ALBUNEX-Registered Trademark- by the FDA, certain expenses
associated with the manufacturing of the product had been recorded as research
and development costs.


                                          25
<PAGE>

    The Company's research and development costs totaled $13.6 and $18.7
million for fiscal years 1996 and 1995, respectively. This decrease of 27% is
due in large part to the decision the Company made in February 1995 to focus its
research and development efforts primarily on its ultrasound contrast agents and
to reduce its staffing by 25% or 47 employees. This decision was made to reduce
the Company's cash burn rate and additionally focus the Company on those markets
where it felt it would earn the greatest return on its invested capital. As a
result, the Company discontinued research on non ultrasound products and
terminated those employees who worked on these projects along with corresponding
reductions in administrative staffing.

    Selling, general and administrative expenses in fiscal year 1996 amounted
to $5.9 million and was substantially unchanged from the prior fiscal year.

    The Company recorded one-time charges in fiscal year 1996 related to the 
conclusion of arbitration with Bracco S.p.A., the write-off of license fees 
associated with discontinued products and a write down to the sale price of 
two buildings that were subsequently sold in March 1996.  As a result, the 
Company recorded a charge of approximately $3.1 million which was included in 
other expenses.  During the fiscal year 1995, the Company received a bonus 
from Mallinckrodt of approximately $3.0 million related to the approval of 
ALBUNEX-Registered Trademark- for marketing in the United States which was 
awarded to MBI's employees pursuant to the terms of the agreement.  As a 
result, the Company recorded a charge of approximately $3.4 million in fiscal 
year 1995.

    Interest expense for fiscal years 1996 and 1995 amounted to $786,000 and
$694,000, respectively, and consisted primarily of mortgage interest on the
Company's manufacturing building. Interest expense increased $92,000 during 1996
due to a loan that the Company obtained in May 1994 to finance the purchase of
two unimproved buildings and underlying land in December 1993. The loan was
restructured into a new note payable in the amount of $6.0 million which bears
interest at prime plus 1% and is payable in monthly installments of principal
plus interest over five years. The interest rate on the note was 9.25% in March
1996.

    Interest income for fiscal years 1996 and 1995 was $1.1 million and $1.2
million, respectively. The decrease in interest income in 1996 was due to lower
average cash and marketable securities balances.

    No tax benefit has been recognized for fiscal years 1996 or 1995 as the
Company had fully utilized its operating loss carryback ability in fiscal year
1993. As of March 31, 1996, the Company had federal and state operating loss
carryforwards of approximately $71.1 million and $34.6 million, respectively,
and realization of future tax benefits from utilization of net operating loss
carryforwards is uncertain.

LIQUIDITY AND CAPITAL RESOURCES

    On May 30, 1996, the Company completed a follow-on public offering of 4.1
million shares of Common Stock at $9.00 per share. Net proceeds from this
offering (after deducting underwriting discounts and commissions and offering
expenses) amounted to approximately $34.1 million. The Company's net working
capital at March 31, 1997 was $43.8 million including cash, cash equivalents and
marketable securities of $41.4 million.

    On September 7, 1995, the Company entered into an Amended and Restated 
Distribution Agreement ("ARDA") and a related investment agreement with 
Mallinckrodt which will provide the Company with between $33.0 million and 
$47.5 million. Under the terms of the agreement, Mallinckrodt is obligated to 
make payments to the Company totaling $20.0 million over four years to 
support clinical trials, related regulatory submissions and associated 
product development of the licensed products, which include, but are not 
limited to, ALBUNEX-Registered Trademark- and OPTISON-TM-. These payments 
will be made in 16 quarterly installments of $1.0 million for the first four 
quarters, $1.25 million for the following eight quarters and $1.5 million for 
the final four quarters. The payments may be accelerated in the event that 
the Company's cumulative outlays for clinical trials are in excess of the 
amounts received at any point in time. However, the quarterly payments may 
not be postponed. The first seven quarterly payments have been received by 
the Company.

                                          26
<PAGE>

    In connection with the amended distribution agreement, the Company also
entered into an investment agreement on September 7, 1995, whereby Mallinckrodt
made an equity investment in the Company by purchasing 1,118,761 unregistered
shares of Common Stock for $13.0 million. The price paid by Mallinckrodt, $11.62
per share before related costs, represented a 40% premium over the
then-prevailing market price.

    In December 1996, the Company and Mallinckrodt amended ARDA to expand the
geographical scope of Mallinckrodt's exclusive marketing and distribution rights
for ALBUNEX-Registered Trademark-, OPTISON-TM- and related products.  The
amendment extended Mallinckrodt's exclusive territory to include the territory
that the Company had formerly licensed to Nycomed consisting of Europe, Africa,
India and parts of Asia.

    Under the amendment to ARDA, Mallinckrodt agreed to pay fees of up to $12.9
million plus 40 percent of product sales to cover royalties and manufacturing.
Mallinckrodt made an initial payment of $7.1 million, consisting of
reimbursement to the Company of $2.7 million that the Company paid to Nycomed to
reacquire the exclusive product rights in Nycomed's territory, payment of $3
million to the Company under the terms of ARDA upon the extension of
Mallinckrodt's exclusive rights to Nycomed's former territory, and payment of
$1.4 million to Nycomed in satisfaction of the Company's obligation to pay 45%
of any amounts that the Company receives in excess of $2.7 million upon the
licensing of the former Nycomed territory to a third party.  Of the remaining
$5.8 million that may be paid, Mallinckrodt will pay $4 million to the Company
(upon the achievement of the specified product development milestone) and $1.8
million to Nycomed (representing 45% of the $4 million payment to the Company).
There can be no assurance, however, that this milestone will be satisfied.

    In September 1996, the Company entered into an agreement with Shionogi
pursuant to which the Company reacquired all rights to manufacture, market and
sell its ALBUNEX-Registered Trademark- family of products in the territory,
consisting of Japan, Taiwan and South Korea, formerly exclusively licensed to
Shionogi.  This agreement settled an outstanding dispute between the two
companies concerning the license and distribution agreement for
ALBUNEX-Registered Trademark- and resulted in the dismissal of all claims raised
by the companies against each other.  Under the agreement, the Company paid $3
million to Shionogi and will pay an additional $5.5 million over the next three
years.

    Capital expenditures for facilities, laboratory equipment, furniture and
fixtures were $726,000, $2.4 million and $2.5 million for fiscal years 1997,
1996 and 1995, respectively.  Expenditures in all three fiscal years consisted
primarily of building improvements and equipment for aseptic manufacturing
facilities being constructed for the manufacture of ALBUNEX-Registered
Trademark- and other products.

    The Company currently leases one of its operating facilities in San Diego.
The lease requires aggregate payments of approximately $3 million through fiscal
year 2003.

    At March 31, 1997, the Company had net working capital of $43.8 million
compared to $18.6 million at March 31, 1996. Cash, cash equivalents and
marketable securities were $41.4 million at March 31, 1997 compared to $20.6
million at March 31, 1996. For the next several years, the Company expects to
incur substantial additional expenditures associated with product development.
The Company anticipates that its existing resources plus payments under its
existing collaborative agreements, will enable the Company to fund its
operations for at least the next 24 months. The Company continually reviews its
product development activities in an effort to allocate its resources to those
products that the Company believes have the greatest commercial potential.
Factors considered by the Company in determining the products to pursue may
include but are not limited to the projected markets, potential for regulatory
approval, technical feasibility and estimated costs to bring the product to the
market. Based upon these factors, the Company may from time to time reallocate
its resources among its product development activities. The Company may pursue a
number of options to raise additional funds, including borrowings; lease
arrangements; collaborative research and development arrangements with
pharmaceutical companies; the licensing of product rights to third parties; or
additional public and private financing, as capital requirements change as a
result of strategic, competitive, technological and regulatory factors. There
can be no assurance that funds from these sources will be available on favorable
terms, if at all.


                                          27
<PAGE>

    The Company believes that inflation and changing prices have not had a
material effect on operations for fiscal years 1997, 1996 and 1995 and that the
impact of government regulation on the Company is not materially different from
the impact on other similar enterprises.


                                          28


<PAGE>

ITEM 8.  FINANCIAL STATEMENTS AND SUPPLEMENTARY DATA

                      INDEX TO CONSOLIDATED FINANCIAL STATEMENTS
                                                                          PAGE
    Report of Independent Public Accountants                               30
    Consolidated Balance Sheets as of March 31, 1996 and 1997              31
    Consolidated Statements of Operations for the Fiscal Years
    Ended March 31, 1995, 1996 and 1997                                    32
    Consolidated Statements of Stockholders'
    Equity for the Fiscal Years Ended March 31, 1995, 1996 and 1997        33
    Consolidated Statements of Cash Flows for the Fiscal Years
    Ended March 31, 1995, 1996 and 1997                                    34
    Notes to Consolidated Financial Statements                             35



ITEM 9.       CHANGES IN AND DISAGREEMENTS WITH ACCOUNTANTS ON ACCOUNTING AND
              FINANCIAL DISCLOSURE

    None.


                                          29
<PAGE>

                       REPORT OF INDEPENDENT PUBLIC ACCOUNTANTS

To the Stockholders and Board of Directors of Molecular Biosystems, Inc.:
    We have audited the accompanying consolidated  balance sheets of Molecular
Biosystems, Inc. (a Delaware corporation) and subsidiaries as of March 31, 1996
and 1997, and the related consolidated statements of operations, stockholders'
equity and cash flows for each of the three years in the period ended March 31,
1997. These financial statements are the responsibility of the Company's
management. Our responsibility is to express an opinion on these financial
statements based on our audits.
    We conducted our audits in accordance with generally accepted auditing
standards. Those standards require that we plan and perform the audit to obtain
reasonable assurance about whether the financial statements are free of material
misstatement. An audit includes examining, on a test basis, evidence supporting
the amounts and disclosures in the financial statements. An audit also includes
assessing the accounting principles used and significant estimates made by
management, as well as evaluating the overall financial statement presentation.
We believe that our audits provide a reasonable basis for our opinion.
    In our opinion, the financial statements referred to above present fairly,
in all material respects, the financial position of Molecular Biosystems, Inc.
and subsidiaries as of March 31, 1996 and 1997, and the results of their
operations and their cash flows for each of the three years in the period ended
March 31, 1997, in conformity with generally accepted accounting principles.


                                                      ARTHUR ANDERSEN LLP


San Diego, California
May 6, 1997


                                          30
<PAGE>

                     MOLECULAR BIOSYSTEMS, INC. AND SUBSIDIARIES

                             CONSOLIDATED BALANCE SHEETS

                                (DOLLARS IN THOUSANDS)
<TABLE>
<CAPTION>
 
                                                                                MARCH 31,     MARCH 31,
                                                                                  1996          1997
<S>                                                                             <C>           <C>
ASSETS
Current assets:
   Cash and cash equivalents                                                    $  12,542     $     587
   Marketable securities, available-for-sale (Note 2)                               8,028        40,827
   Accounts and notes receivable                                                      260           902
   License rights (Note 7)                                                          3,000         8,500
   Inventories                                                                        622           342
   Prepaid expenses and other assets                                                  406           249
                                                                                ---------     ---------
       Total current assets                                                        24,858        51,407
                                                                                ---------     ---------

Property and equipment, at cost:
   Building and improvements                                                       14,158        14,544
   Equipment, furniture and fixtures                                                3,943         4,567
   Construction in progress                                                           941           511
                                                                                ---------     ---------
                                                                                   19,042        19,622
   Less:  Accumulated depreciation and amortization                                 5,322         6,434
                                                                                ---------     ---------

       Total property and equipment                                                13,720        13,188
                                                                                ---------     ---------

Other assets:
   Patents and license rights, net of amortization $917 and
     $191, respectively (Notes 5 and 8)                                               297           341
   Certificate of deposit, pledged (Note 2 and 4)                                   3,000         3,000
   Other assets, net                                                                1,954         2,223
                                                                                ---------     ---------
       Total other assets                                                           5,251         5,564
                                                                                ---------     ---------

                                                                                $  43,829     $  70,159
                                                                                ---------     ---------
                                                                                ---------     ---------

LIABILITIES AND STOCKHOLDERS' EQUITY
Current liabilities:
   Current portion of long-term debt                                            $   1,262     $   1,267
   Accounts payable and accrued liabilities (Notes 1 and 5)                         3,964         4,684
   Compensation accruals                                                            1,031         1,613
                                                                                ---------     ---------
       Total current liabilities                                                    6,257         7,564
                                                                                ---------     ---------

Long-term debt, net of current portion (Note 4)                                     8,610         7,349
                                                                                ---------     ---------

Other noncurrent liabilities                                                            -         3,500
                                                                                ---------     ---------

Commitments and contingencies (Note 5)

Stockholders' equity (Note 6):
   Common Stock, $.01 par value, 20,000,000 and 40,000,000 shares
   authorized, 13,296,186 and 17,745,897 shares
     issued and outstanding, respectively                                             133           177
   Additional paid-in capital                                                      91,468       127,483
   Accumulated deficit                                                           (62,185)       (75,469)
   Unrealized loss on available-for-sale securities                                   (6)           (82)
   Less notes receivable from sale of Common Stock                                  (281)             -
   Less 18,970 and 40,470 shares of treasury stock, at cost, respectively           (167)          (363)
                                                                                ---------     ---------

       Total stockholders' equity                                                  28,962        51,746
                                                                                ---------     ---------

                                                                                $  43,829     $  70,159
                                                                                ---------     ---------
                                                                                ---------     ---------

</TABLE>

  The accompanying notes are an integral part of these consolidated statements.


                                          31
<PAGE>

                     MOLECULAR BIOSYSTEMS, INC. AND SUBSIDIARIES

                        CONSOLIDATED STATEMENTS OF OPERATIONS

                   (DOLLARS IN THOUSANDS, EXCEPT PER SHARE AMOUNTS)

<TABLE>
<CAPTION>
                                                                  FISCAL YEARS ENDED MARCH 31,
                                                        ----------------------------------------------
                                                            1995             1996              1997
                                                        -----------       -----------      -----------
<S>                                                     <C>               <C>               <C>
Revenues (Note 7):
   Revenues under collaborative agreements                 $ 15,132         $   2,412          $  4,500
   Product revenues                                           1,769               647               626
   License fees                                                  40                25             5,725
                                                           --------          --------          --------
                                                             16,941             3,084            10,851
                                                           --------          --------          --------
Operating expenses:                                 
   Research and development costs (Note 7)                   18,743            13,588             9,902
   Costs of products sold                                     1,608             1,553             4,748
   Selling, general and administrative expenses               5,864             5,862             8,052
   Other expenses (Note 8)                                    3,403             3,110             3,000
                                                           --------          --------          --------
                                                             29,618            24,113            25,702
                                                           --------          --------          --------
                          
   Loss from operations                                     (12,677)          (21,029)          (14,851)

Interest expense                                               (694)             (786)             (810)
Interest income                                               1,189             1,102             2,377
                                                           --------          --------          --------
Net loss                                                   $(12,182)         $(20,713)         $(13,284)
                                                           --------          --------          --------
                                                           --------          --------          --------
Loss per common share                                      $  (1.02)         $  (1.62)         $  (0.78)
                                                           --------          --------          --------
                                                           --------          --------          --------
Weighted average common shares outstanding                 $ 11,999            12,758            16,926
                                                           --------          --------          --------
                                                           --------          --------          --------
</TABLE>

 The accompanying notes are an integral part of these consolidated statements.


                                      32

<PAGE>
                  MOLECULAR BIOSYSTEMS, INC. AND SUBSIDIARIES

                CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY
                           
                            (DOLLARS IN THOUSANDS)

<TABLE>
<CAPTION>

                                                                                          Unrealized      Notes
                                                                                          Gain (Loss)  Receivable
                                          Common Stock          Additional               on Available- from Sale
                                     -------------------------    Paid-in   Accumulated    for-sale    of Common  Treasury
                                        Shares         Amount     Capital      Deficit     Securities    Stock     Stock    Total
                                      -----------    ----------   -------     ---------   ------------  -------  ------   ------
<S>                                   <C>              <C>        <C>          <C>           <C>         <C>       <C>     <C>
Balance at March 31, 1994              11,989,361       $120      $ 78,259     $(29,290)     $    -      $(954)    $ (59)  $ 48,076
  Exercise of stock options                10,200          -           163            -           -         20         -        183
  Unrealized loss on available-
    for-sale securities                         -          -             -            -        (118)         -         -       (188)
  Forgiveness of notes                          
    receivable                                  -          -             -            -           -        465         -        465
  Net loss                                      -          -             -      (12,182)          -          -         -    (12,182)
                                       ----------      -----      --------     --------       -----     ------     -----   --------
Balance at March 31, 1995              11,999,561        120        78,422       (41,472)      (118)      (469)    $ (59)    36,424
  Unrealized gain on available-
    for-sale securities                         -          -             -             -        112          -         -        112
  Purchase of treasury stock (Note 6)           -          -           (79)            -          -        188      (108)         1
  Issuance of shares in settle-
    ment of stockholder suit              172,414          2         1,498             -          -          -         -      1,500
  Proceeds from sale of                   
    Common Stock (Note 7)               1,118,761         11        11,591             -          -          -         -     11,602
  Exercise of stock options                 5,450          -            36             -          -          -         -         36
  Net loss                                      -          -             -       (20,713)         -          -         -    (20,713)
                                       ----------      -----      --------      --------      -----     ------     -----   --------
Balance at March 31, 1996              13,296,186      $ 133      $ 91,468      $(62,185)     $  (6)    $ (281)    $(167)  $ 28,962
  Unrealized gain on available-
    for-sale securities                         -          -             -             -        (76)         -         -        (76)
  Proceeds from Public         
    Offering (Note 6)                   4,140,000         41        34,045             -                                     34,086
  Purchase of treasury stock (Note 6)           -          -           (85)            -          -        281      (196)         -
  Exercise of stock options               295,500          3         1,928                                                    1,931
  Issuance of stock grants                 14,211          -           127                                                      127
  Net loss                                      -          -             -       (13,284)         -          -         -    (13,284)
                                       ----------      -----      --------      --------      ------     ------     -----   -------
Balance at March 31, 1997              17,745,897      $ 177      $127,483      $(75,469)    $  (82)    $    -     $(363)   $51,746
                                       ----------      -----      --------      --------     ------     ------     -----   -------
                                       ----------      -----      --------      --------     ------     ------     -----   -------

</TABLE>


The accompanying notes are an integral part of these consolidated statements.

                                      33



<PAGE>

                     MOLECULAR BIOSYSTEMS, INC. AND SUBSIDIARIES
                        CONSOLIDATED STATEMENTS OF CASH FLOWS
                                (Dollars in thousands)

<TABLE>
<CAPTION>

                                                                          Fiscal Years Ended March 31,
                                                                    -----------------------------------------
                                                                       1995            1996         1997
<S>                                                                 <C>             <C>          <C>

Cash flows from operating activities:
  Net loss                                                          $ (12,182)       $(20,713)    $(13,284)
  Adjustments to reconcile net loss to net cash
    used operating a activities:
    Depreciation and amortization                                         3,022           2,217        1,435
    Loss on disposals of property and equipment                              35             680            1
    Loss on write-off of license fees related to discontinued products        -           1,025            -
    Write-off of former Nycomed territory license rights                      -               -        3,000
    Forgiveness of note receivable from sale of Common Stock              1,319              56          109
    Changes in operating assets and liabilities:
    Receivables                                                          (4,889)          4,863           29
    Inventories                                                            (225)            773          280
    Prepaid expenses and other assets                                       (81)             36         (623)
    Accounts payable and accrued liabilities                              1,670          (1,626)         721
    Compensation accruals                                                  (175)            620          582
                                                                     ----------      ----------    ---------
      Cash used in operating activities                                 (11,056)        (12,069)      (7,750)
                                                                     ----------      ----------    ---------
Cash flows from investing activities:                       
    Purchases of property and equipment                                 (2,528)         (2,397)        (726)
    Proceeds from sale of property and equipment                             -           6,484            4
    Additions to patents and license rights                               (634)         (1,045)        (226)
    Acquisition of license rights from Shionogi                              -               -       (3,000)
    Acquisition of license rights from Nycomed                               -               -       (2,000)
    (Increase) decrease in other assets                                     75             (28)        (269)
    (Increase) decrease in marketable securities                        11,989           4,920      (32,876)
                                                                     ----------      -----------   ---------
      Cash provided by (used for) investing activities                   8,902           7,934      (39,093)
                                                                     ----------      ------------  ---------
Cash flows from financing activities:
    Net proceeds from public offering of Common Stock                       -               -       34,086
    Net proceeds from issuance of Common Stock                            183          11,638        2,058
    Long-term debt proceeds                                             5,000           1,438            -
    Principal payments on long-term debt                                 (254)           (281)      (1,256)
                                                                     ----------      ----------   --------
     Cash provided by financing activities                              4,929          12,795       34,888
                                                                     ----------      ----------    --------
Increase (decrease) in cash and cash equivalents                        2,325           8,660      (11,955)

Cash and cash equivalents, beginning of year                            1,557           3,882       12,542
                                                                     ----------      ---------     --------
Cash and cash equivalents, end of year                                $ 3,882        $ 12,542      $   587
                                                                     ----------      ---------     ---------
                                                                     ----------      ---------     ---------
Supplemental cash flow disclosures:
  Interest income received                                            $ 1,433        $  1,141      $ 1,609
                                                                      ---------      ---------     ---------
                                                                      ---------      ---------     ---------
  Interest paid                                                       $   688        $    780      $   804
                                                                      ---------      ---------     ---------
                                                                      ---------      ---------     ---------
</TABLE>

  The accompanying notes are an integral part of these consolidated statements.


                                          34
<PAGE>

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS

1.  ORGANIZATION AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES

    DESCRIPTION OF BUSINESS-

    Molecular Biosystems, Inc. ("MBI" or the "Company") discovers, develops and
    manufactures proprietary diagnostic ultrasound imaging agents.  The
    Company's continuing operations have been unprofitable since 1992.  The
    Company does not foresee product revenues from sales of ALBUNEX-Registered
    Trademark-, the Company's first product and the first ultrasound imaging
    agent available in the United States, as resulting in profitable operations
    for the Company.  Operating losses may occur for at least the next several
    years due to continued requirements for research and development, including
    preclinical testing and clinical trials, regulatory activities and the high
    costs of commercialization activities.  The magnitude of the losses and the
    time required by the Company to achieve profitability are highly dependent
    on the regulatory approval and market acceptance of current and future
    products and are therefore uncertain.  There is no assurance that the
    Company will be able to achieve profitability on a sustained basis or at
    all.

    PRINCIPLES OF CONSOLIDATION-

    The Consolidated Financial Statements include the accounts of Molecular
    Biosystems, Inc. and its wholly owned subsidiaries.  All significant
    intercompany accounts and transactions have been eliminated.

    Certain amounts in the prior years' financial statements and notes have
    been reclassified to conform with the current year presentation.

    USE OF ESTIMATES-

    The preparation of financial statements in conformity with generally
    accepted accounting principles requires management to make estimates and
    assumptions that affect the reported amounts of assets and liabilities and
    disclosure of contingent assets and liabilities at the date of the
    financial statements and the reported amounts of revenues and expenses
    during the reported period.  Actual results could differ from those
    estimates.

    RESEARCH AND DEVELOPMENT COSTS-

    All research and development costs and related special purpose equipment
    costs are charged to expense as incurred.

    REVENUES UNDER COLLABORATIVE AGREEMENTS-

    Revenues under collaborative agreements, which have been the primary source
    of revenues for the Company, consist of three types of revenues.  The first
    type, milestone payments, is earned in connection with research activities
    performed under the terms of research and development license agreements.
    Revenue is recognized on the achievement of certain milestones, some of
    which relate to obtaining regulatory approvals.  Accordingly, the estimated
    dates of the milestone achievements are subject to revision based on
    periodic evaluations by the Company and its partners of the attainment of
    specified milestones, including the status of the regulatory approval
    process.  Advance payments received in excess of amounts earned are
    classified as deferred contract revenues and the resulting revenues are
    recognized based on work performed at a predetermined rate or level of
    expense reimbursement.

    Additionally, under the terms of the Amended and Restated Distribution
    Agreement ("ARDA") entered into in September 1995, Mallinckrodt Medical,
    Inc. ("Mallinckrodt") will pay the Company $20.0 million over four years to
    further the development of OPTISON-TM- (the Company's second-generation
    product) and related products.  These payments will be made in 16 quarterly
    installments starting at $1.0 million for the first four quarters, $1.25
    million for the following eight quarters and $1.5 million for the final
    four quarters. Pursuant to the agreement, half of each payment is
    designated for clinical development expenses and will be recorded as
    deferred revenue until such expenses are incurred, and the remaining half
    of each payment will be recognized as research revenue when received.

    Finally, under the original Mallinckrodt agreement (see note 7),
    Mallinckrodt agreed to pay a bonus to MBI equivalent to Mallinckrodt's
    first year product sales of ALBUNEX-Registered Trademark- at its sales
    price to end users of


                                          35
<PAGE>

    the product. MBI recorded this bonus each quarter based upon Mallinckrodt's
    sales to its customers.  This is the third type of revenues included under
    the caption "Revenues Under Collaborative Agreements."

    REVENUE RECOGNITION FOR PRODUCT SOLD-

    The Company recognizes revenue when goods are shipped to the customers.

    REVENUE RECOGNITION FOR LICENSE FEES-

    The Company recognizes revenue when license fees are received, provided the
    Company has no future obligations.

    INCOME TAXES-

    The Company accounts for income taxes in accordance with Statement of
    Financial Accounting Standards No. 109 (SFAS No. 109), "Accounting for
    Income Taxes."  SFAS No. 109 is an asset and liability approach that
    requires the recognition of deferred assets and liabilities for the
    expected future tax consequences of events that have been recognized
    differently in the Company's financial statements or tax returns.

    CASH EQUIVALENTS-

    Cash equivalents include marketable securities with original maturities of
    three months or less when acquired. The Company has not realized any losses
    on its cash equivalents.

    MARKETABLE SECURITIES

    In April 1994, the Company adopted Statement of Financial Accounting
    Standards ("SFAS") No. 115, "Accounting for Certain Investments in Debt and
    Equity Securities."  The Company's management has classified its investment
    securities as available-for-sale and records holding gains or losses as a
    separate component of stockholders' equity.  The cumulative effect of the
    change was not material to the Company's financial statements.

    CONCENTRATION OF CREDIT RISK-

    The Company invests its excess cash in debt instruments of financial
    institutions and corporations with strong credit ratings.  The Company has
    established guidelines relative to diversification and maturities that
    maintain safety and liquidity.  These guidelines are periodically reviewed
    and modified to take advantage of trends in yields and interest rates.

    INVENTORIES-

    Inventories are stated at lower of cost (first-in, first-out) or market,
    and consist of the following major classes (in thousands):


                                                                 MARCH 31,
                                                            -----------------
                                                              1996      1997

    Raw materials and supplies                               $  558    $  253
    Work in process                                               3        45
    Finished goods                                               61        44
                                                             ------    ------
                                                             $  622    $  342
                                                             ------    ------
                                                             ------    ------

    Work in process and finished goods include the cost of materials, direct
    labor and manufacturing overhead.


                                          36
<PAGE>

    PROPERTY AND EQUIPMENT-

    Property and equipment are stated at cost.  Depreciation and amortization
    are provided using the straight-line method over estimated useful lives of
    five years for equipment, 31 years for buildings and improvements and the
    term of the lease for leasehold improvements.

    PATENTS AND LICENSE RIGHTS AND OTHER ASSETS-

    Patents and license rights are amortized on the straight-line method over
    their estimated useful lives of five to ten years.

    In June 1989, the Company prepaid $2.0 million in royalties on the first
    $66.6 million of sales of ALBUNEX-Registered Trademark- and OPTISON-TM- in
    the United States.  Included in other assets at March 31, 1996 and 1997 is
    approximately $1.9 million which is the portion of this prepayment which
    has not yet been expensed.  Additionally, other assets at March 31, 1997
    include $300,000 of real estate investment related to an employment
    agreement with one of the Company's officers.

    The Company periodically reevaluates the original assumptions and rationale
    utilized in the assessment of the carrying value and estimated lives of
    these and other long-lived assets.  The determinants used for this
    evaluation include management's estimate of the asset's ability to generate
    positive income and cash flow as well as the strategic significance of the
    respective assets.

    IMPAIRMENT OF LONG-LIVED ASSETS-

    Effective April 1, 1996, the Company adopted Statement of Financial
    Accounting Standards No. 121, "Accounting for the Impairment of Long-Lived
    Assets and for Long-Lived Assets to be Disposed Of" (SFAS 121).  The
    statement requires that long-lived assets and certain identifiable
    intangibles to be held and used by an entity be reviewed for possible
    impairment whenever events or changes in circumstances indicate that the
    carrying amount of an asset may not by fully recoverable.  The adoption of
    this statement had no material effect on the Company's financial
    statements.

    ACCOUNTS PAYABLE AND ACCRUED LIABILITIES-

    Accounts payable and accrued liabilities consist of the following major
    classes (in thousands):

                                                              MARCH 31,
                                                        --------------------
                                                          1996         1997

    Accrued legal and professional fees                      500        1,250
    License rights payable and related fees (Note 7)       2,300        2,000
    Accounts payable - trade                               1,028        1,162
    Other miscellaneous accruals                             136          272
                                                        --------     --------
                                                        $  3,964     $  4,684
                                                        --------     --------
                                                        --------     --------


                                          37
<PAGE>

    STOCK BASED COMPENSATION-

    The Company has elected to adopt the disclosure only provisions of
    Statement of Financial Accounting Standards No. 123, "Accounting for
    Stock-Based Compensation" (SFAS 123).  Accordingly the Company will
    continue to account for its stock based compensation plans under the
    provisions of APB No. 25.  Therefore, the adoption of SFAS 123 by the
    Company had no material effect on the Company's financial position and
    results of operations.

    LOSS PER SHARE-

    Loss per common share has been computed by dividing the loss by the
    weighted average number of common shares outstanding during the years.
    Warrants and options do not impact the per share loss since they would be
    antidilutive.  In March 1997, the Financial Accounting Standards Board
    issued Statement of Financial Accounting Standards No. 128, "Earnings per
    Share" (SFAS 128), which changes the method of calculating earnings per
    share.  SFAS 128 is effective for financial statements issued after
    December 15, 1997.  The earnings per share of the Company for the years
    ended March 31, 1996 and 1997 would not be materially different under SFAS
    128 as that presented therein.

2.  MARKETABLE SECURITIES

    Investments are recorded at estimated fair market value, and consist
    primarily of treasury securities, government agency securities and
    corporate obligations.  The Company has classified all of its investments
    as available-for-sale securities. The following table summarizes
    available-for-sale securities at March 31, 1996 (in thousands):

<TABLE>
<CAPTION>
 
                                                      COST NET OF
                                                       PREMIUMS/       GROSS      GROSS       ESTIMATED
                                                       DISCOUNTS    UNREALIZED  UNREALIZED      FAIR
                                                       AMORTIZED       GAINS      LOSSES        VALUE
                                                      -----------   ----------  ----------    ---------
<S>                                                   <C>           <C>         <C>           <C>
    U.S. treasury securities and obligations of U.S.
      government agencies                                $  3,289     $      -      $  (8)     $  3,281
    Corporate obligations                                   4,745            2           -        4,747
                                                      -----------   ----------  ----------    ---------
    Marketable securities available-for-sale             $  8,034     $      2      $  (8)     $  8,028
                                                      -----------   ----------  ----------    ---------
                                                      -----------   ----------  ----------    ---------

</TABLE>

    The gross realized losses on sales of available-for-sale securities
    totaled $36,000 for the year ended March 31, 1996.  The proceeds on
    these sales totaled $5.2 million.

    The following table summarizes available-for-sale securities at March 31,
    1997 (in thousands):

<TABLE>
<CAPTION>

                                                      COST NET OF
                                                       PREMIUMS/       GROSS       GROSS      ESTIMATED
                                                       DISCOUNTS    UNREALIZED  UNREALIZED       FAIR
                                                       AMORTIZED       GAINS      LOSSES        VALUE
                                                      -----------   ----------  ----------    ---------
<S>                                                   <C>           <C>         <C>           <C>
    U.S. treasury securities and obligations of U.S.
      government agencies                               $   3,503     $      -     $   (8)     $  3,495
    Corporate obligations                                  37,406            -        (74)       37,332
                                                      -----------   ----------  ----------    ---------
    Marketable securities available-for-sale            $  40,909     $      -     $  (82)     $ 40,827
                                                      -----------   ----------  ----------    ---------
                                                      -----------   ----------  ----------    ---------

</TABLE>

    There were no gross realized gains or losses on sales of available-for-sale
    securities for the year ended March 31, 1997.


                                          38
<PAGE>

    The amortized cost and estimated fair value of debt and marketable
    securities at March 31, 1997, by contractual maturity, are shown below.
    Expected maturities may differ from contractual maturities because the
    issuers of the securities may have the right to prepay obligations without
    prepayment penalties.

                                                  COST LESS
                                                  PREMIUMS/    ESTIMATED
                                                  DISCOUNTS       FAIR
                                                  AMORTIZED      VALUE

    Due in one year or less                       $  31,284    $  31,231
    Due after one year through three years            9,625        9,596
                                                  ---------    ---------
                                                  $  40,909    $  40,827
                                                  ---------    ---------
                                                  ---------    ---------

    At March 31, 1997 a $3 million certificate of deposit was held as a
    compensating balance under the Company's debt agreement (see note 4).

3.  INCOME TAXES

    As described in Note 1, the Company uses the asset and liability method of
    computing deferred income taxes in accordance with Statement of Financial
    Accounting Standards No. 109, "Accounting for Income Taxes."

    The effective income tax rate on the loss before income taxes differs from
    the statutory U.S. federal income tax rate as follows (in thousands):

                                             FISCAL YEARS ENDED MARCH 31,
                                        -------------------------------------
                                             1995          1996          1997

    Computed statutory tax              $  (3,992)    $  (7,036)    $  (4,517)
    State income taxes                       (729)       (1,270)         (843)
    Tax exempt interest                        (5)          (74)          (29)
    Losses without income tax benefit       4,715         8,376         5,362
    Other                                      11             4            27
                                        ---------     ---------     ---------
    Provision for income taxes          $       -     $       -     $       -
                                        ---------     ---------     ---------
                                        ---------     ---------     ---------

    At March 31, 1997, the Company has deferred tax assets of approximately $
    34.0 million relating to the following tax loss carryforwards for income
    tax purposes (in thousands):

<TABLE>
<CAPTION>

                                                                                    EXPIRATION
                                                                        AMOUNT         DATES
<S>                                                                   <C>           <C>
    Federal ($84,400) and state ($26,600) net operating losses        $ 111,000     1998-2012
    Research and development credit - federal                         $   1,800     1998-2012
    Research and development credit - state                           $     600     Indefinite
    Alternative minimum tax credit                                    $     300     Indefinite

</TABLE>



                                      39






<PAGE>


    For financial reporting purposes, a valuation allowance has been recognized
    to offset the deferred tax assets related to the carryforwards.  If
    realized, approximately $2.2 million of the tax benefit for those items
    will be applied directly to paid-in capital, related to deductible expenses
    reported as a reduction of the proceeds from issuing common stock in
    connection with the exercise of stock options.



4.  LONG-TERM DEBT

    Long-term debt consists of the following (in thousands):
                                                     MARCH 31,
                                            ------------------------
                                                1996          1997

    Net payable - due 2004                  $   3,872      $   3,816
    Net payable - due 2001                      6,000          4,800
                                            ----------     ----------
                                                9,872          8,616
    Less - current portion                      1,262          1,267
                                            ----------     ----------
                                            $   8,610      $   7,349
                                            ----------     ----------
                                            ----------     ----------

    The note payable due in 2004 bears interest at a variable rate based upon
    the weighted average Eleventh District cost of funds plus 2.35 percent.
    The interest rate on this note is adjusted semi-annually and was eight
    percent at March 31, 1996 and 1997.  The note is secured by the Company's
    manufacturing facility and certain of the equipment contained therein and
    is payable in monthly installments of principal and interest. As of March
    31, 1996, maturities of this note in each of the next five fiscal years
    are:  $67,000, $73,000, $79,000, $85,000 and $92,000.

    The note payable due in 2001 bears interest at the prime rate plus one
    percent (9.50 percent at March 31, 1997) and is payable in monthly
    installments of $100,000 plus accrued interest through April, 2001. The
    loan contains covenants relating to cashflow coverage, minimum cash
    balances and requires a compensating balance of $3.0 million.  The loan is
    secured by the tangible assets of the Company.  This note replaces a
    previously outstanding note (note payable - due 2000) which was retired in
    March 1996 in conjunction with the sale of certain of the Company's
    buildings and underlying land.  Proceeds from the sale of the buildings
    were approximately $6.5 million after deducting costs related to the sale.
    Approximately $4.6 million of the proceeds from the sale was used to retire
    the existing note payable.



5.  COMMITMENTS AND CONTINGENCIES

    LEASES

    The Company conducts certain of its operations in leased premises.  Terms
    of the leases, including renewal options, vary by lease.  Future minimum
    rental commitments for all noncancelable operating leases that have initial
    or remaining lease terms in excess of one year are as follows (in
    thousands):




    FISCAL YEAR ENDED MARCH 31,                                 AMOUNT

    1998                                                           436
    1999                                                           688
    2000                                                           715
    2001                                                           744
    2002                                                           383
                                                               --------
    Total minimum lease payments                                $2,966
                                                               --------
                                                               --------


                                          40
<PAGE>

    The lease expires in fiscal 2003 and contains a renewal provision of up
    to ten years at the end of the lease term.  The Company is obligated to pay
    real estate taxes, insurance and utilities on its portion of the leased 
    property.  Rental expense for the years ended March 31, 1995, 1996 and 1997
    was $508,000, $350,000 and $194,000, respectively.

    LICENSE AGREEMENTS

    The Company has entered into license agreements requiring future royalty
    payments ranging from 1 1/4%  to 3% of specified product sales relating to
    the licensed technologies.  Additionally, there is a minimum royalty
    payment due to one licensor in each calendar year for the following
    amounts, $500,000 for 1998, $600,000 for 1999 and for each succeeding year.

    In May 1993 the Company entered into an exclusive license agreement with
    Bracco S.p.A. of Milan, Italy, for the distribution rights in a specified
    territory.  In March 1994, Bracco notified the Company that it desired to
    rescind the agreement and demanded the return of the license fee.  The
    Company notified Bracco that it had regarded Bracco's notice of rescission
    as a breach of contract.  In January 1995, Bracco filed a demand for
    arbitration claiming return of the $2.0 million license fee, in addition to
    other monetary relief.  The Company filed a counterdemand asking for
    damages in the amount of at least $5.5 million and other monetary relief,
    claiming that Bracco's purported rescission was in bad faith and resulted
    from its acquisition of the exclusive licensee of a competing agent.  In
    November 1995, the arbitrator awarded Bracco $1.7 million plus statutory
    interest on a legal theory not advanced by Bracco.  MBI appealed the award
    to the Superior Court of Los Angeles County, who affirmed the award in a
    decision. The Company has appealed the award to the California Appellate
    Court, and paid the judgment in March 1996 pending a final decision of the
    appeal.  The Company has recognized charges to operations aggregating
    approximately $2.4 million to reflect the amount of the award, interest
    accrued thereon and related attorneys' fees.  Approximately $1.4 million of
    these charges were recorded during the year ended March 31, 1996, and
    approximately $1.0 million was charged to operations in prior years (see
    note 8).

    In April 1996 Shionogi filed a demand for arbitration seeking damages
    in excess of $37 million plus punitive damages. Shionogi had been
    disappointed with ALBUNEX-Registered Trademark- sales in Japan and has
    blamed "quality" problems. In response, the Company also filed a
    demand for arbitration seeking in excess of $45 million plus punitive
    damages. In September 1996, the Company entered into an agreement with
    Shionogi pursuant to which the Company reacquired all rights to
    manufacture, market and sell its ALBUNEX-Registered Trademark- family
    of products in the territory, consisting of Japan, Taiwan and South
    Korea, formerly exclusively licensed to Shionogi. This agreement
    settled the outstanding dispute between the two companies concerning
    the license and distribution agreement for ALBUNEX-Registered
    Trademark- and resulted in the dismissal of all claims raised by the
    companies against each other in the pending arbitration proceeding
    discussed above. Under the agreement the Company paid $3 million to
    Shionogi in fiscal year 1996 and will pay an additional $5.5 million
    over the next three years (see note 7). The Company is currently in
    discussions with potential licensees for Shionogi's territory.

    PATENT MATTERS

    The Company has become aware of several United States patents issued to
    other companies covering various attributes of perfluorocarbon-containing
    imaging agents such as OPTISON-TM-.  Certain of these companies also are
    pursuing foreign patent protection.  Some of these companies are developing
    or may be developing ultrasound contrast imaging agents that would compete
    with OPTISON-TM-.

    The patents and patent applications of these other companies involve a
    number of complex legal and factual issues that are currently unresolved.
    The Company believes that there may be a substantial overlap among many of
    the claims in their patents and that it is likely that there will be
    administrative proceeding or litigation in the United States and abroad to
    adjudicate their conflicting rights.  The Company believes


                                          41
<PAGE>

    that it could become a party to one or more of these actions, which could
    take several years to conclude and could result in a substantial cost to
    the Company.

    The Company believes that, for a variety of reasons, its commercialization
    of OPTISON-TM- will not infringe any valid patent held by one of these
    other companies.  Depending upon the particular patent claim, these reasons
    include (i) differences between OPTISON-TM- and the subject of the claim,
    (ii) the invalidity of the claim due to the existence of prior art, (iii)
    the inadequacy of the claim's specifications and (iv) lack of enablement.
    The Company intends to challenge the validity of any such patent granted to
    one of the other companies if the patent is asserted against the Company,
    and the Company will enforce its own patents if any product of one of the
    other companies infringes the Company's patent claims.

    If any patent granted to one of the other companies is asserted against the
    Company, litigation or administrative proceedings may be necessary to
    defend the Company against infringement claims or to determine the
    priority, scope and validity of the other company's proprietary rights.
    Any such litigation or administrative proceedings could result in a
    substantial cost to the Company; and given the complexity of the legal and
    factual issues, the inherent vicissitudes and uncertainty of litigation,
    and other factors, there can be no assurance of a favorable outcome.  An
    unfavorable outcome could have a material adverse effect on the Company's
    business, financial condition and results of operations.  Moreover, there
    can be no assurance that, in the event of an unfavorable outcome, the
    Company would be able to obtain a license to any proprietary rights that
    may be necessary to commercialize OPTISON-TM-, either on acceptable terms
    or at all.  If the Company were required to obtain a license necessary to
    commercialize OPTISON-TM-, the Company's failure or inability to do so
    would have a material adverse effect on the Company's business, financial
    condition and results of operations.

    FDA PROCEEDINGS

    On April 21, 1997, the United States District Court for the District of
    Columbia entered an order enjoining the United States Food and Drug
    Administration (the "FDA") from continuing any approval or review
    procedures relating to the Company's Pre-Market Approval application
    ("PMA") for OPTISON-TM-, until ten days after the FDA resolves the merits
    of citizen petitions previously filed with the FDA by the plaintiffs.
    These citizen petitions requested the FDA to regulate all ultrasound
    imaging contrast agents either as drugs (as the plaintiffs' contrast agents
    under development are currently classified) or as medical devices (as the
    Company's ALBUNEX-Registered Trademark- and OPTISON-TM- are currently
    classified).  In February 1997, the FDA's advisory Radiological Devices
    Panel had recommended approval of the Company's PMA for OPTISON-TM-.

    As described in the court's opinion accompanying its order, the purpose of
    the order was to grant "a limited injunction to preserve the status quo
    pending a decision by the FDA as to how to treat all ultrasound contrast
    agents, whether as medical devices or as drugs, or to provide a rational
    explanation for the different treatment of the products at issue".  The
    court's order thus identically enjoins the FDA from continuing any approval
    or review procedures relating to any of the plaintiffs' respective products
    until ten days after the FDA resolves the merits of the plaintiffs' citizen
    petitions.

    OTHER

    The Company is periodically a defendant in other legal actions incidental
    to its business activities.  While any litigation has an element of
    uncertainty, the Company believes that the outcome of any of these actions
    or all of them combined will not have a materially adverse effect on its
    financial condition or results of operations.

                                          42
<PAGE>

6.  STOCKHOLDERS' EQUITY

    On May 30, 1996, the Company completed a public offering of 4.1 million
    shares of Common Stock at $9.00 per share.  Net proceeds from this offering
    (after deducting underwriting discounts and commissions and offering
    expenses) amounted to approximately $34.1 million.

    In August 1996, the Shareholders approved the Company's Board of Director's
    recommendation to increase the maximum number of shares of Common Stock
    from 20,000,000 shares to 40,000,000 shares.

    In June 1989, 1990 and 1991 the Company issued warrants to Nycomed
    exercisable through June 1994, 1995 and 1996 pursuant to an agreement
    granting to Nycomed a right of first refusal to purchase additional
    unregistered shares in connection with the private sale of shares by the
    Company.  As of June 1996, all warrants had expired.

    Mallinckrodt has certain registration rights with respect to the Common
    Stock issued and issuable to them.

    State Farm Mutual Insurance Company ("State Farm") has registration rights
    under an agreement which the Company entered into in August 1990 to
    facilitate State Farm's purchase of Common Stock from E.I. du Pont de
    Nemours and Company, the Company's collaborative partner in its now
    discontinued diagnostic DNA probe business.  State Farm has certain
    registration rights with respect to this Common Stock.

    COMMON SHARES RESERVED

    Common shares were reserved for the following purposes (in thousands):

                                                          MARCH 31,
                                                ----------------------------
                                                  1996                1997

Warrants                                            15                    -
Options Granted                                  2,228                2,685
Future Grants of Options                         1,063                  994
                                                ----------------------------
                                                 3,306                3,679
                                                ----------------------------
                                                ----------------------------

    STOCK OPTIONS-

    In 1997, the Board of Directors approved the adoption of the 1997
    Directors' Option Plan and authorized the issuance of options for 300,000
    shares pursuant to the plan.  The plan is subject to approval by the
    Company's shareholders at the annual meeting scheduled for August 1997.

    1993 PLANS

    In 1993 both the Board of Directors and the shareholders of the Company
    approved the 1993 Stock Option Plan and the 1993 Outside Directors Stock
    Option Plan (together, the 1993 Plans).  The 1993 Plans were intended to
    replace the Company's 1984 Incentive Stock Option Plan and the 1984
    Nonstatutory Stock Option Plan (together, the 1984 Plan), under which all
    of the options authorized to be granted have been granted.  The 1993 Plans
    provide for the grant of both qualified incentive stock options and
    nonstatutory stock options to purchase Common Stock to employees (1993
    Stock Option Plan) or non-employee directors of the Company (1993 Outside
    Directors Stock Option Plan) at no less than the fair value of the stock on
    the date of grant.  Options granted under these plans are exercisable per
    the terms specified in each individual option, but not before one year
    (unless the option exercisability is accelerated by the Company's Board of
    Directors), or later than ten years from the date of grant.

                                          43
<PAGE>

    During fiscal 1997, the shareholders approved the Company's Board of 
    Directors recommendation to amend the Company's 1993 Stock Option Plan to 
    increase the maximum number of shares from 2,500,000 shares to 3,250,000 
    shares.

    1984 PLAN

    The Company had an Incentive Stock Option Plan and Nonstatutory Stock
    Option Plan (together, the 1984 Plan) which provided for the grant of
    options to purchase Common Stock to employees or non-employee directors of
    the Company at no less than the fair value of the stock on the date of
    grant.  Options granted under the 1984 Plan were exercisable per the terms
    specified in each individual option, but not before one year (unless the
    option exercisability was accelerated by the Company's Board of Directors)
    or later than five years from the date of grant.  The 1984 Plan expired in
    July 1994 and there are no shares reserved for future grants.

    On May 11, 1995, the Board of Directors voted to offer the Company's
    non-executive employees the opportunity to reprice certain stock options
    which were originally granted under the 1984 Plan to the closing price on
    May 31, 1995. The Board approved this repricing because it believes
    retaining key employees is in the best interests of the stockholders and
    the Company. During the fourth quarter of fiscal 1995, following a decline
    in the stock price and a restructuring which included a twenty-five percent
    staff reduction, key employees were being contacted by other companies and
    agencies about employment opportunities elsewhere. The Board believes the
    repricing of the options was the most effective employment retention tool
    available.

    OTHER OPTION GRANTS-

    The Company has granted to employees, consultants and scientific advisors
    options to purchase shares of common stock.  These options are exercisable
    per the terms specified in each individual option and lapse pursuant to the
    terms in the applicable plan.  The options were granted at amounts per
    share which were not less than the fair market value at the date of grant.

    Additional information with respect to the Company's option plans is as
    follows:

<TABLE>
<CAPTION> 
                                                         EMPLOYEE OPTION PLANS                     DIRECTORS' OPTION PLAN
                                              -------------------------------------------   ----------------------------------
                                                                     OPTION PRICE                              OPTION PRICE
                                                  SHARES                 PER SHARE          SHARES              PER SHARE
                                              ---------------  --------------------------  ------------  ---------------------
<S>                                           <C>              <C>       <C>  <C>          <C>           <C>       <C>
    Options Outstanding at March 31, 1994         2,297,740    $13.38    -    $31.13         20,000       $17.00
    Granted                                         451,406      7.00    -     15.63         20,000         8.13
    Exercised                                       (10,200)    13.75    -     16.50             -
    Expired or lapsed                              (666,467)     8.75    -     28.75             -
                                              ---------------  ---------- ---------------  ------------  --------- -----------
    Options Outstanding at March 31, 1995         2,072,479      7.00    -     31.13         40,000         8.13  -    17.00
    Granted                                         723,602      6.00    -      8.63         20,000         8.63
    Exercised                                        (5,450)     6.38    -      7.38             -
    Expired or lapsed                              (622,676)     6.38    -     28.75             -
                                               ---------------  ---------- ---------------  ------------  --------- -----------
    Options Outstanding at March 31, 1996         2,167,955      6.00    -     31.13         60,000         8.13  -    17.00
    Granted                                         914,375      6.50    -     11.13         15,000         6.88
    Exercised                                      (295,500)     6.00    -     10.63             -
    Expired or lapsed                              (176,760)     6.00    -     31.13             -
                                               ---------------  ---------- ---------------  ------------  --------- -----------
    Options Outstanding at March 31, 1997         2,610,070      6.00    -     22.25         75,000         6.88  -    17.00
                                               ---------------                              ------------  --------- -----------
    Options exercisable at March 31, 1997         1,171,920                                  60,000
                                               ---------------                              ------------
    Reserved for future grants at
      March 31, 1997                                968,730                                  25,000
                                               ---------------                              ------------
</TABLE>
                                          44


<PAGE>

    As permitted, the Company has adopted the disclosure only provisions of
    SFAS 123 effective April 1, 1996.  Accordingly, no compensation expense has
    been recognized for the stock option plans.  Had compensation cost for the
    Company's 1997 grants for stock-based compensation plans been determined
    consistent with SFAS 123, the Company's net income, net income applicable
    to common share owners, and net income per common share for March 31, 1996
    and 1997 would approximate the pro forma amounts below (in thousands,
    except per share amounts).


                                                 FISCAL YEARS ENDED MARCH 31,
                                                 -----------------------------
                                                      1996          1997

         Net income (loss) - as reported         $      (20,713)  $   (13,284)
         Net income (loss) - pro forma           $      (21,274)  $   (14,559)
         Earning per share (loss) - as reported  $        (1.62)  $     (0.78)
         Earning per share (loss) - pro forma    $        (1.67)  $     (0.86)



    Because the SFAS 123 method of accounting has not been applied to options
    granted prior to April 1, 1995, the resulting pro forma compensation cost
    may not be representative of that to be expected in future years.  The fair
    value of each option grant was estimated on the date of grant using the
    Black Scholes option-pricing model with following weighted average
    assumptions used for grant in fiscal year 1997: risk free rate of 6.26%,
    expected option life of 4 years, expected volatility of 55% and a dividend
    rate of zero.  The weighted average fair value of options granted from the
    Employee stock option plans during fiscal 1996 and 1997 was $6.93 and
    $9.29, respectively.  The weighted average fair value of options granted
    from the Outside Director stock option plan during fiscal 1996 and 1997 was
    $8.63 and $6.88, respectively.

    NOTES RECEIVABLE FROM SALE OF COMMON STOCK-

    During fiscal year 1997, the Company repurchased 21,500 shares of Common
    Stock and forgave notes receivable from related parties of approximately
    $390,000 relating to the exercise of options to purchase common stock of
    the Company by officers and other employees. Of this amount, approximately
    $109,000 was included in accounts and notes receivable and represents taxes
    payable by the individuals at the time of these option exercises plus
    accrued interest thereon, as well as accrued interest on purchase price
    notes.  The amounts relating to the purchase price of the common stock are
    recorded as a reduction to stockholders' equity.

    During fiscal year 1996, the Company repurchased 15,000 shares of Common
    Stock in a similar transaction whereby the Company forgave notes receivable
    of $244,000.  Of this amount, approximately  $56,000 was included in
    accounts receivable that related to taxes payable by the individuals at the
    time of the option exercise date, accrued interest thereon, and accrued
    interest on the notes receivable.

7.  SIGNIFICANT RESEARCH CONTRACTS

    The Company conducts all of its research and development activities on its
    own behalf.  Under the terms of its collaborative research agreements, the
    Company retains all ownership rights to its proprietary technologies,
    subject to licensing arrangements made with its licensees.

    In December 1987, December 1988 and March 1989, the Company entered into
    respective agreements (the Original Agreements) with Nycomed A.S.
    (Nycomed), a Norwegian corporation, Mallinckrodt Medical, Inc.
    (Mallinckrodt), of St. Louis, Missouri and Shionogi & Co., Ltd. (Shionogi),
    a Japanese corporation, under which the Company granted exclusive licenses,
    restricted to certain geographic areas, to test, evaluate, develop and sell
    products covered by specified patents of the Company relating directly


                                          45
<PAGE>

    to the design, manufacture or use of microspheres for ultrasound imaging in
    vascular applications. The Company also granted rights to sublicense, use,
    make and sell the licensed products under specified royalty arrangements.

    Under the terms of the Original Agreements, as amended, the Company earned
    and received license fees of $6.5 million.  The Original Agreements also
    provide for total payments to the Company aggregating up to $66.5 million,
    to continue product development, clinical trials, preproduction and
    premarketing activities relating to the Company's ultrasound imaging
    contrast agents for vascular applications.  These amounts are to be
    received in installments based on the achievement of certain milestones by
    the Company.

    In September 1995, the Company entered into an Amended and Restated
    Distribution Agreement ("ARDA"), as well as a related investment
    agreement, with Mallinckrodt. Under ARDA, the geographical scope of
    Mallinckrodt's exclusive right was expanded to include all of the
    countries of the world other than those covered by the Company's
    license agreements with Shionogi and Nycomed.  Additionally, the
    duration of Mallinckrodt's exclusive right was also extended from
    October 1999 until the later of July 1, 2003 or three years after the
    date that the Company obtains approval from the United States Food and
    Drug Administration ("FDA") to market OPTISON-TM- for an intravenous
    myocardial perfusion indication.

    The agreement provides the Company with between $33.0 million and
    $47.5 million in financing (including the $13.0 million common stock
    investment discussed below).  Under the terms of the agreement,
    Mallinckrodt must make guaranteed payments to the Company totaling
    $20.0 million over four years to support clinical trials, related
    regulatory submissions and associated product development of the
    licensed products, which include but are not limited to
    ALBUNEX-Registered Trademark- and OPTISON-TM-.  These payments will be
    made in 16 quarterly installments of $1.0 million for the first four
    quarters, $1.25 million for the following eight quarters and $1.5
    million for the final four quarters.  The payments may be accelerated
    in the event that the Company's cumulative outlays for clinical trials
    are in excess of the amounts received at any point in time.  However,
    the quarterly payments may not be postponed.  As of March 31, 1997 the
    first six quarterly payments had been received by the Company.

    ARDA requires the Company to spend at least $10.0 million of the $20.0
    million it receives over four years on clinical trials to support
    regulatory filings with the FDA for cardiac indications of the
    licensed products.  The Company's expenditure of this $10.0 million
    will be made in accordance with the directions of a joint steering
    committee which the Company and Mallinckrodt established in order to
    expedite the development and regulatory approval of OPTISON-TM- by
    enabling the parties to share their expertise relating to clinical
    trials and the regulatory approval process.  The Company and
    Mallinckrodt have each appointed three of the six members of the joint
    steering committee.

    In connection with ARDA, the Company also entered into an investment
    agreement whereby the Company sold 1,118,761 unregistered shares of
    its common stock to Mallinckrodt for $13.0 million, or a price of
    $11.62 per share before related costs.  Combined with the 181,818
    shares of the Company's common stock that Mallinckrodt acquired in
    December 1988, Mallinckrodt currently owns approximately 9.8% of the
    Company's issued and outstanding shares.

    In addition, ARDA grants the Company the option (at its own discretion)
    to repurchase all of the shares of the Company's common stock that
    Mallinckrodt purchased under the investment agreement for $45.0 million,
    subject to various price adjustments.  This option is exercisable beginning
    the later of July 1, 2000 or the date that the Company obtains approval
    from the FDA to market OPTISON-TM- for an intravenous myocardial perfusion
    indication and ending on the later of June 30, 2003 or three years after
    the date that the Company obtains approval from the FDA to market
    OPTISON-TM- for an intravenous myocardial perfusion.  If the Company
    exercises this option, the Company may co-market ALBUNEX-Registered
    Trademark-, OPTISON-TM- and related products in all of the countries
    covered by the amended distribution agreement.

                                          46
<PAGE>

    In December 1996, the Company and Mallinckrodt amended ARDA to expand
    the geographical scope of Mallinckrodt's exclusive marketing and
    distribution rights for ALBUNEX-Registered Trademark-, OPTISON-TM- and
    related products. The amendment extended Mallinckrodt's exclusive 
    territory to include the territory that the Company had formerly
    licensed to Nycomed consisting of Europe, Africa, India and parts of
    Asia.  Under the amendment to ARDA, Mallinckrodt agreed to pay fees up
    to $12.9 million plus 40 percent of product sales to cover royalties
    and manufacturing.  Mallinckrodt made an initial payment of $7.1
    million, consisting of reimbursement to the Company of $2.7 million
    that the Company paid to Nycomed to reacquire the exclusive product
    rights in Nycomed's territory, payment of $3 million to the Company
    under the terms of ARDA upon the extension of Mallinckrodt's exclusive
    rights to Nycomed's former territory, and payment of $1.4 million to
    Nycomed in satisfaction of the Company's obligation to pay 45 percent
    of any amounts that the Company receives in excess of $2.7 million
    upon the licensing of the former Nycomed territory to a third party.
    Of the remaining $5.8 million that may be paid, Mallinckrodt will pay
    $4 million to the Company (upon the achievement of the specified
    product development milestone) and $1.8 million to Nycomed
    (representing 45% of the $4 million payment to the Company). There can
    be no assurance, however, that this milestone will be satisfied.  The
    Company has included all costs related to the reacquisition of its
    license rights from Nycomed in other expenses in the financial
    statements.  Of these costs, approximately $1 million was paid in
    fiscal 1996 and the remainder was paid in fiscal 1997.

    Mallinckrodt is the Company's principal strategic marketing partner
    for its ALBUNEX-Registered Trademark- and OPTISON-TM- ultrasound
    contrast agents.  Under the Company's arrangements with Mallinckrodt,
    Mallinckrodt has substantial control over all aspects of marketing the
    Company's product in its territories.

    In October 1995, the Company entered into an agreement whereby it
    reacquired all rights to INFOSON (the European designation for
    ALBUNEX-Registered Trademark-), OPTISON-TM- and related products from
    Nycomed, the Company's European licensee.  The Company agreed to pay
    Nycomed $2.7 million and 45% of any amounts in excess of $2.7 million
    that the Company receives in payment for the transfer of marketing
    rights in the former Nycomed territory to a third party.  The Company
    also agreed to pay Nycomed a royalty based on future sales, as defined
    in the agreement.  As stated above, the license rights were resold to
    Mallinckrodt for amounts stipulated in the amendment to ARDA.

    In September 1996, the Company entered into an agreement with Shionogi
    pursuant to which the Company reacquired all rights to manufacture,
    market and sell its ALBUNEX-Registered Trademark- family of products
    in the territory, consisting of Japan, Taiwan and South Korea,
    formerly exclusively licensed to Shionogi.  This agreement settled an
    outstanding dispute between the two companies concerning the license
    and distribution agreement for ALBUNEX-Registered Trademark- and
    resulted in the dismissal of all claims raised by the companies
    against each other.  Under the agreement the Company paid $3 million
    to Shionogi and will pay an additional $5.5 million over the next
    three years.  The Company is currently in discussions with potential
    licensees for Shionogi's territory.

    During the years ended March 31, 1995, 1996 and 1997, the Company received
    contract research payments and earned revenue under the above agreements as
    follows (in thousands):

                                          47
<PAGE>

                                       FISCAL YEARS ENDED MARCH 31,
                               --------------------------------------
                                  1995           1996           1997

    Contract payments received:
         Nycomed               $     733      $     -      $       -
         Mallinckrodt             10,554        6,257         10,200
                              -----------    ---------    -----------
         Total                 $  11,287      $ 6,257      $  10,200
                              -----------    ---------    -----------
                              -----------    ---------    -----------

    Contract payments earned:
         Nycomed               $     733      $     -      $       -
         Mallinckrodt             14,399        2,412         10,200
                              -----------    ---------    -----------
         Total                 $  15,132      $ 2,412      $  10,200
                              -----------    ---------    -----------
                              -----------    ---------    -----------

8.  OTHER EXPENSES

    Other expenses include the following for the years presented:

<TABLE>
<CAPTION>

                                                                                   FISCAL YEARS ENDED MARCH 31,
                                                                              1995           1996          1997
    <S>                                                                     <C>            <C>            <C>
    Legal settlements and related costs (Note 5)                            $    350       $  1,418       $      -
    Write-off of license rights of former Nycomed territory (Note 7)               -              -          3,000
    Write-off of license fees related to discontinued products                     -          1,025              -
    Loss on sale of real estate                                                    -            667              -
    Approval bonus paid by U.S. marketing partner                              3,053              -              -
                                                                            --------       --------       --------
                                                                            $  3,403       $  3,110       $  3,000
                                                                            --------       --------       --------
                                                                            --------       --------       --------
</TABLE>


    In September 1996, the Company entered into an agreement with Nycomed for
    the repurchase of the rights to manufacture, market and sell its
    ALBUNEX-Registered Trademark- family of products in the territory formerly
    exclusively licensed to Nycomed (see note 7).  As a result, during fiscal
    year 1997 the Company wrote off the license rights of the former Nycomed
    territory in the amount of $3 million.

    The Company recorded one-time charges in fiscal year 1996 related to the
    conclusion of arbitration with Bracco S.p.A., the write off of license fees
    associated with discontinued products and a write down to the sale price of
    two buildings that were subsequently sold in March 1996.

    During fiscal year 1995, the Company received a bonus from Mallinckrodt of
    approximately $3.0 million related to the approval of ALBUNEX-Registered
    Trademark- for marketing in the United States which was awarded to MBI's
    employees pursuant to the terms of the agreement.  As a result, the Company
    recorded a charge of approximately $3.0 million, included under other
    expenses.

                                          48


<PAGE>

9.  SUMMARY OF UNAUDITED QUARTERLY FINANCIAL INFORMATION

    The following is a summary of the unaudited quarterly results of operations
    for the years ended March 31, 1997 and 1996 (in thousands, except per share
    amounts):

<TABLE>
<CAPTION>

                                                    JUN 30         SEP 30         DEC 31        MAR 31
                                                   --------       --------       --------      -------
<S>                                                <C>            <C>            <C>           <C> 
   QUARTER ENDED:
    Fiscal 1997
    Revenues                                       $  1,178       $  1,216       $  7,007      $  1,450
    Research and Development Costs                    2,636          2,328          2,354         2,584
    Total Operating Costs and Expenses                5,691          5,465          8,298         6,248
    Net Loss                                         (4,384)        (3,693)          (879)       (4,328)
    Loss Per Common Share                              (.30)          (.21)          (.05)         (.24)
    Weighted Average Common Shares Outstanding       14,787         17,560         17,572        17,711

                                                     JUN 30         SEP 30         DEC 31         MAR 31
                                                     ------         ------        --------       -------
    QUARTER ENDED:
    Fiscal 1996
    Revenues                                         $  350         $  348       $  1,245      $  1,141
    Research and Development Costs                    3,196          3,386          3,276         3,730
    Total Operating Costs and Expenses                4,890          5,528          8,039         5,656
    Net Loss                                         (4,518)        (5,135)        (6,645)       (4,415)
    Loss Per Common Share                              (.37)          (.42)          (.50)         (.33)
    Weighted Average Common Shares Outstanding       12,113         12,196         13,291        13,293
</TABLE>

10. SUBSEQUENT EVENTS

    On April 27, 1997, the United States District Court entered an order
    enjoining the FDA from continuing any approval or review procedures 
    relating to the Company's PMA for OPTISON-TM-, until ten days after the
    FDA resolves the merits of citizen petitions previously filed with the FDA 
    by the plaintiffs.  These citizen petitions requested the FDA to regulate 
    all ultrasound imaging contrast agents either as drugs (as the plaintiffs'
    contrast agents under development are currently classified) or as medical
    devices (as the Company's ALBUNEX-Registered Trademark- and OPTISON-TM- are
    currently classified).  In February 1997, the FDA's advisory Radiological
    Devices Panel had recommended approval of the Company's PMA for
    OPTISON-TM-.

    As described in the court's opinion accompanying its order, the purpose of
    the order was to grant "a limited injunction to preserve the status quo
    pending a decision by the FDA as to how to treat all ultrasound contrast
    agents, whether as medical devices or as drugs, or to provide a rational
    explanation for the different treatment of the products at issue".  The
    court's order thus identically enjoins the FDA from continuing any approval
    or review procedures relating to any of the plaintiffs' respective products
    until ten days after the FDA resolves the merits of the plaintiffs' citizen
    petitions.

    On May 12, 1997, the Board of Directors of the Company implemented its
    previously adopted plan of management succession.  As part of the
    transition plan, Kenneth J. Widder, M.D. relinquished the office of Chief
    Executive Officer and will remain Chairman of the Board.  Dr. Widder will
    continue to be responsible for the Company's strategic planning and
    corporate development activities.  The Company's Board elected Bobba
    Venkatadri, currently President and Chief Operating Officer, to the
    additional office of Chief Executive Officer.


                                          49
<PAGE>


                                       PART III


ITEM 10.      DIRECTORS AND EXECUTIVE OFFICERS OF THE REGISTRANT

    Information concerning directors is incorporated in this report by
reference to the information contained under the caption "Election of
Directors" in the Company's definitive proxy statement for the 1997 Annual 
Meeting of Stockholders to be held on August 20, 1997 ("1997 Proxy Statement").
Information concerning executive officers is included in Part I of this report.


ITEM 11.      EXECUTIVE COMPENSATION

    Information concerning executive compensation is incorporated in this 
report by reference to the information contained under the caption "Executive 
Compensation" in the Company's 1997 Proxy Statement.


ITEM 12. SECURITY OWNERSHIP OF CERTAIN BENEFICIAL OWNERS AND MANAGEMENT

    Information concerning security ownership is incorporated in this report by
reference to the information contained under the caption "Stock Ownership" in
the Company's 1997 Proxy Statement.


ITEM 13. CERTAIN RELATIONSHIPS AND RELATED TRANSACTIONS

    Information concerning certain relationships and related transactions is
incorporated in this report by reference to the information contained under the
caption "Certain Relationships and Related Transactions" in the Company's 1997
Proxy Statement.


                                          50
<PAGE>

                                            PART IV

ITEM 14. EXHIBITS, FINANCIAL STATEMENT SCHEDULES AND REPORTS ON FORM 8-K

(a)(1)   FINANCIAL STATEMENTS AND FINANCIAL STATEMENT SCHEDULES

(2) The financial statements and financial statement schedules filed as a part
    of this Report are listed in the "Index to Consolidated Financial
    Statements and Schedules" on page 29.

(3) Exhibits -Exhibits marked with an asterisk are filed with this Report; all
    other Exhibits are incorporated by reference.  Exhibits marked with a
    dagger are management contracts or compensatory plans or arrangements.

    3.1       Certificate of Incorporation of the Company, as amended to date
              (by amendments filed March 4, 1981, March 30, 1982, March 14,
              1983, April 18, 1983, and November 20, 1987).  (Incorporated by
              reference from Exhibit 3.1 to the Company's Annual Report on Form
              10-K for the fiscal year ended March 31, 1988.)

    3.2       Certificate of Incorporation of Syngene, Inc. as amended
              September 20, and December 31, 1989.  (Incorporated by reference
              from Exhibit 3.2 to the Company's Annual Report of Form 10-K for
              the fiscal year ended March 31, 1990.)

    3.3       By-Laws of the Company, as amended and restated September 18,
              1990.  (Incorporated by reference from Exhibit 3.3 to the
              Company's Annual Report on Form 10-K for the fiscal year ended
              March 31, 1991).

    3.4       First Amendment, dated August 20, 1992 to the By-Laws of the
              Company, as amended and restated September 18, 1990.   
              (Incorporated by reference from Exhibit 3.4 to the Company's 
              Annual Report on Form 10-K for the fiscal year ended 
              March 31, 1994.)

    3.5       By-Laws of Syngene, Inc. (Incorporated by reference from
              Exhibit 3.4 to the Company's Annual Report on form 10-K for
              the fiscal year ended March 31, 1990.)

    10.1      Restated License Agreement dated June 1, 1989 between the
              Company and Steven B. Feinstein, M.D., and related Research
              and Supply Agreement dated June 1, 1989.  (Incorporated by
              reference from Exhibits 10.1 and 10.2 to the Company's
              Current Report on Form 8-K filed on June 9, 1989.)

    10.2      Amendment to Research Support and Supply Agreement dated
              December 15, 1992 between the Company and Steven B.
              Feinstein, M.D. (Incorporated by reference from Exhibit 10.2
              to the Company's Annual Report on Form 10-K for the fiscal
              year ended March 31, 1993.)

    10.3      License and Cooperative Development Agreement dated December
              31, 1987 between the Company and Nycomed AS ("Nycomed"), and
              related Investment


                                          51
<PAGE>

              Agreement dated December 31, 1987, Registration Agreement dated
              December 31, 1987 and Common Stock Purchase Warrant dated January
              19, 1988.  (Incorporated by reference from Exhibit 10.8 to the
              Company's Annual Report on Form 10-K for the fiscal year ended
              March 31, 1988.)

    10.4      Amendment to License and Cooperative Development Agreement
              dated June 15, 1989 between the Company and Nycomed.
              (Incorporated by reference from Exhibit 10.8 to the
              Company's Annual Report on Form 10-K for the fiscal year
              ended March 31, 1989.)

    10.5      Amendment No. 3 to License and Cooperative Development
              Agreement dated October 24, 1995 between the Company and
              Nycomed Imaging AS.  (Incorporated by reference from Exhibit
              10.3 to the Company's Quarterly Report on Form 10-Q/A  for
              the quarterly period ended December 31, 1995.)

    10.6      Amended and Restated Distribution Agreement dated September
              7, 1995   between the Company and Mallinckrodt Medical, Inc.
              (Incorporated by reference from Exhibit 10.1 to the
              Company's Quarterly Report on Form 10-Q for the quarterly
              period ended December 31, 1995.)

    10.7*     Amendment to Amended and Restated Distribution Agreement
              dated November 4, 1996 between the Company and Mallinckrodt
              Medical, Inc.

    10.8      Investment Agreement dated December 7, 1988 between the Company
              and Mallinckrodt Medical, Inc.(Incorporated by reference from
              Exhibit 10.9 to the Company's Annual Report on form 10-K for the
              fiscal year ended March 31, 1989.)

    10.9      Investment Agreement dated September 7, 1995 between the Company
              and Mallinckrodt Medical, Inc. (Incorporated by reference from
              Exhibit 10.2 to the Company's Quarterly Report on Form 10-Q/A for
              the quarterly period ended December 31, 1995.)

    10.10     Letter Agreement dated February 18, 1991 between the Company
              and Schering Aktiengesellschaft.  (Incorporated by reference
              from Exhibit 10.9 to the Company's Annual Report of Form
              10-K for the fiscal year ended March 31, 1991.)

    10.11*    Settlement Agreement and Mutual Release dated September 10, 1996
              between the Company and Shionogi & Co., Ltd.

    10.12     Exclusive License Agreement dated April 1, 1992 between the
              Company and The Regents of the University of California.
              (Incorporated by reference from Exhibit 10.30 to the
              Company's Annual Report on Form 10-K for the fiscal year
              ended March 31, 1992.)

    10.13     License Agreement dated August 23, 1991 between the Johns Hopkins
              University, Towson State University and the Company.
              (Incorporated by reference from Exhibit 10.31 to the Company's
              Annual Report on Form 10-K for the fiscal year ended March 31,
              1992.)


                                          52
<PAGE>

    10.14     License Agreement dated November 11, 1991 between the
              Company and the Regents of the University of Michigan.
              (Incorporated by reference from Exhibit 10.32 to the
              Company's Annual Report on Form 10-K for the fiscal year
              ended March 31, 1992.)

    10.15     Exclusive License Agreement dated July 31, 1990 between the
              Company and the Regents of the University of California, and
              Amendment Agreement dated April 1, 1992.  (Incorporated by
              reference from Exhibit 10.33 to the Company's Annual Report on
              Form 10-K for the fiscal year ended March 31, 1992.)

    10.16     License Option Agreement dated January 29, 1993 between the
              Company and Abbott Laboratories. (Incorporated by reference from
              Exhibit 10.1 to the Company's Current Report on Form 8-K dated
              January 29, 1993.)

    10.17     License Termination Agreement dated September 18, 1995
              between Dendritech, Inc., Michigan Molecular Institute and
              the Company. (Incorporated by reference from Exhibit 10.24
              to the Company's Annual Report on Form 10-K for the fiscal
              year ended March 31, 1996.)

    10.18+    Molecular Biosystems, Inc. Pre-1984 Nonstatutory Stock
              Option Plan. (Incorporated by reference from Exhibit 10.11
              to the Company's Annual Report on Form 10-K for the fiscal
              year ended March 31, 1989.)

    10.19+    Molecular Biosystems, Inc. 1984 Incentive Stock Option Plan
              and 1984 Nonstatutory Stock Option Plan, as amended by First
              and Second Amendments. (Incorporated by reference from
              Exhibit 10.15 to the Company's Annual Report on Form 10-K
              for the fiscal year ended March 31, 1988.)

    10.20+    Third and Fourth Amendments to Molecular Biosystems, Inc.
              1984 Incentive Stock Option Plan and 1984 Nonstatutory Stock
              Option Plan.  (Incorporated by reference from Exhibit 10.13
              to the Company's Annual Report on Form 10-K for the fiscal
              year ended March 31, 1989.)

    10.21+    Fifth Amendment to Molecular Biosystems, Inc. 1984 Incentive
              Stock Option Plan and 1984 Nonstatutory Stock Option Plan.
              (Incorporated by reference from Exhibit 10.15 to the Company's
              Annual Report on Form 10-K for the fiscal year ended March 31,
              1990.)

    10.22+    Sixth and Seventh Amendments to Molecular Biosystems, Inc.
              1984 Incentive Stock Option Plan and 1984 Nonstatutory Stock
              Option Plan. (Incorporated by reference from Exhibit 10.15
              to the Company's Annual Report on Form 10-K for the fiscal
              year ended March 31, 1991.)

    10.23+    Eighth and Ninth Amendments to Molecular Biosystems, Inc. 1984
              Incentive Stock Option Plan and 1984 Nonstatutory Stock Option
              Plan.  (Incorporated by reference from Exhibit 10.25 to the
              Company's Annual Report on Form 10-K for the fiscal year ended
              March 31, 1993.)

    10.24+    Form of Stock Option Agreement used with the Company's 1984
              Incentive Stock Option Plan and 1984 Nonstatutory Stock Option
              Plan.  (Incorporated by


                                          53
<PAGE>

              reference from Exhibit 10.16 to the Company's Annual Report on 
              Form 10-K for the fiscal year ended March 31, 1988.)

    10.25+    Molecular Biosystems, Inc. 1993 Stock Option Plan. (Incorporated
              by reference from Exhibit 4.2 to the Company's Registration
              Statement No. 33-78572 on Form S-8, dated May 3, 1994, filed on
              May 5, 1994.)

    10.26+    Form of Stock Option Agreement used with the Company's 1993 Stock
              Option Plan. (Incorporated by reference from Exhibit 10.33 to the
              Company's Annual Report on Form 10-K for the fiscal year ended
              March 31, 1994.)

    10.27+    Molecular Biosystems, Inc. 1993 Outside Directors Stock Option
              Plan. (Incorporated by reference from Exhibit 4.2 to the
              Company's Registration Statement No. 33-78564 on Form S-8, dated
              May 3, 1994, filed on May 5, 1994.)

    10.28+    Form of Stock Option Agreement used with the Company's 1993
              Outside Directors Stock Option Plan. (Incorporated by
              reference from Exhibit 10.35 to the Company's Annual Report
              on Form 10-K for the fiscal year ended March 31, 1994.)

    10.29+    Employment Agreement dated April 25, 1995 between the
              Company and Kenneth J. Widder, M. D. (Incorporated by
              reference from Exhibit 10.30 to the Company's Annual Report
              on Form 10-K for the fiscal year ended March 31, 1995.)

    10.30+    Employment Agreement dated October 1, 1992 between the Company
              and James L. Barnhart, Ph.D. (Incorporated by reference from
              Exhibit 10.34 to the Company's Annual Report on Form 10-K for the
              fiscal year ended March 31, 1993.)

    10.31+    Employment Agreement dated April 1, 1994 between the Company and
              Gerard A. Wills.  (Incorporated by reference from Exhibit 10.39
              to the Company's Annual Report on Form 10-K for the fiscal year
              ended March 31, 1995.)

    10.32+    Employment Agreement dated August 1, 1994 between the
              Company and Allan H. Mizoguchi. (Incorporated by reference
              from Exhibit 10.41 to the Company's Annual Report on Form
              10-K for the fiscal year ended March 31, 1995.)


                                          54
<PAGE>

    10.33+    Employment Agreement dated November 1, 1995 between the Company
              and Bobba Venkatadri. (Incorporated by reference from Exhibit
              10.41 to the Company's Annual Report on Form 10-K for the fiscal
              year ended March 31, 1996.)

    10.34+*   First Amendment to Employment Agreement dated April 30, 1996
              between the Company and Bobba Venkatadri.

    10.35     Separation Agreement effective May 10, 1996 as amended on June 6,
              1996 between the Company and Steven Lawson.  (Incorporated by
              reference from Exhibit 10.45 to the Company's Annual Report on
              Form 10-K for the fiscal year ended March 31, 1996).

    10.36*    Partnership Agreement dated October 18, 1996 between the Company
              and Bobba and Annapurna Venkatadri.

    10.37     Sublease dated February 6, 1992 between the Company and Sunward
              Technologies, California.  (Incorporated by reference from
              Exhibit 10.27 to the Company's Annual Report on Form 10-K for the
              fiscal year ended March 31, 1992.)

    10.38     Triple Net Lease dated June 19, 1995 between the Company and
              Radnor/Collins/Sorrento Partnership. (Incorporated by reference
              from Exhibit 10.43 to the Company's Annual Report on Form 10-K
              for the fiscal year ended March 31, 1995.)

    10.39     First Amendment to Lease dated July 15, 1994 between the Company
              and Principal Mutual life Insurance Company. (Incorporated by
              reference from Exhibit 10.44 to the Company's Annual Report on
              Form 10-K for the fiscal year ended March 31, 1995.)

    10.40     Office Lease dated September 9, 1991 between the Company and The
              Principal Financial Group. (Incorporated by reference from
              Exhibit 10.28 to the Company's Annual Report on Form 10-K for the
              fiscal year ended March 31, 1992.)

    10.41     Promissory note dated December 31, 1993 between the Company
              and James L. Barnhart. (Incorporated by reference from
              Exhibit 10.48 to the Company's Annual Report on Form 10-K
              for the fiscal year ended March 31, 1994.)

    10.42     Second Amendment to Promissory note dated June 24, 1996 between
              the Company and James L. Barnhart. (Incorporated by reference
              from Exhibit 10.52 to the Company's Annual Report on Form 10-K
              for the fiscal year ended March 31, 1996.)

    10.43     Promissory note dated December 31, 1993 between the Company and
              John W. Young. (Incorporated by reference from Exhibit 10.49 to
              the Company's Annual Report on Form 10-K for the fiscal year
              ended March 31, 1994.)

    19        Documents not previously filed are marked with an asterisk
              (*).


                                          55


<PAGE>


    23*       Consent of Arthur Andersen LLP.

(b)           REPORTS ON FORM 8-K

              A Current Report on Form 8-K dated April 21,1997, was filed
              on May 9, 1997, reporting (1) Stay of Action by the FDA, (2)
              the brand name announced for FS069, and (3) the Company's
              patent matters.


                                          56


<PAGE>

SIGNATURES

    Pursuant to the requirements of Section 13 or 15(d) of the Securities
Exchange Act of 1934, the Registrant has duly caused this Report to be signed on
its behalf by the undersigned, thereunto duly authorized, on
May 20, 1997.

                              MOLECULAR BIOSYSTEMS, INC.


                               By:   /s/ Kenneth J. Widder, M.D.
                                    -----------------------------------------
                                         Kenneth J. Widder, M.D.
                                         Chairman of the Board and
                                         Chief Executive Officer

    Pursuant to the requirements of the Securities Exchange Act of 1934, this
Report has been signed below by the following persons on behalf of the
Registrant and in the capacities and on the dates indicated.

      SIGNATURE                      TITLE                         DATE
      ---------                      -----                         ----


/s/ Kenneth J. Widder, M.D.          Chairman of the Board       May 20, 1997
- ------------------------------
   Kenneth J. Widder, M.D.

/s/ Bobba Venkatadri                 President, Chief Executive   May 20, 1997
- ------------------------------       Officer
   Bobba Venkatadri


/s/ Gerard A. Wills                  Vice President - Finance     May 20, 1997
- ------------------------------       and Chief Financial Officer
   Gerard A. Wills                   (Principal Financial and
                                     Accounting Officer)


/s/ Robert W. Brightfelt             Director                     May 20, 1997
- ------------------------------
   Robert W. Brightfelt


/s/ Charles C. Edwards, M.D.         Director                     May 20, 1997
- ------------------------------
   Charles C. Edwards, M.D.

/s/ Gordon C. Luce                   Director                     May 20, 1997
- ------------------------------
   Gordon C. Luce

/s/ David Rubinfien                  Director                     May 20, 1997
- ------------------------------
   David Rubinfien

/s/ David W. Barry, M.D.             Director                     May 20, 1997
- ------------------------------
   David W. Barry, M. D.

/S/ Jerry Jackson                    Director                     May 20, 1997
- ------------------------------
   Jerry Jackson


                                          57


<PAGE>

                                  INDEX TO EXHIBITS
                                                                  Sequentially
                                                                    Numbered
EXHIBIT DESCRIPTION                                                   PAGE
- -------------------                                                   ----
         Exhibits -Exhibits marked with an asterisk are filed with 
         this Report; all other Exhibits  are incorporated by 
         reference. Exhibits marked with a dagger are management
         contracts or compensatory plans or arrangements.

    3.1       Certificate of Incorporation of the Company, as amended to date
              (by amendments filed March 4, 1981, March 30, 1982, March 14,
              1983, April 18, 1983, and November 20, 1987).  (Incorporated by
              reference from Exhibit 3.1 to the Company's Annual Report on Form
              10-K for the fiscal year ended March 31, 1988.)

    3.2       Certificate of Incorporation of Syngene, Inc. as amended
              September 20, and December 31, 1989.  (Incorporated by
              reference from Exhibit 3.2 to the Company's Annual Report of
              Form 10-K for the fiscal year ended March 31, 1990.)

     3.3      By-Laws of the Company, as amended and restated September
              18, 1990.  (Incorporated by reference from Exhibit 3.3 to
              the Company's Annual Report on Form 10-K for the fiscal year
              ended March 31, 1991).

     3.4      First Amendment, dated August 20, 1992 to the By-Laws of the
              Company, as amended and restated September 18, 1990.
              (Incorporated by reference from Exhibit 3.4 to the Company's
              Annual Report on Form 10-K for the fiscal year ended March 31,
              1994.)

    3.5       By-Laws of Syngene, Inc. (Incorporated by reference from
              Exhibit 3.4 to the Company's Annual Report on form 10-K for
              the fiscal year ended March 31, 1990.)

    10.1      Restated License Agreement dated June 1, 1989 between the
              Company and Steven B. Feinstein, M.D., and related Research
              and Supply Agreement dated June 1, 1989.  (Incorporated by
              reference from Exhibits 10.1 and 10.2 to the Company's
              Current Report on Form 8-K filed on June 9, 1989.)

    10.2      Amendment to Research Support and Supply Agreement dated
              December 15, 1992 between the Company and Steven B.
              Feinstein, M.D. (Incorporated by reference from Exhibit 10.2
              to the Company's Annual Report on Form 10-K for the fiscal
              year ended March 31, 1993.)

    10.3      License and Cooperative Development Agreement dated December 31,
              1987 between the Company and Nycomed AS ("Nycomed"), and related
              Investment Agreement dated December 31, 1987, Registration
              Agreement dated December 31, 1987 and Common Stock Purchase
              Warrant dated January 19, 1988.  (Incorporated by reference from
              Exhibit 10.8 to the Company's Annual Report on    Form 10-K for
              the fiscal year ended March 31, 1988.)


                                          58


<PAGE>

                                                                    Sequentially
                                                                      Numbered
EXHIBIT DESCRIPTION                                                     PAGE
- -------------------                                                     ----

    10.4      Amendment to License and Cooperative Development Agreement dated
              June 15, 1989 between the Company and Nycomed.  (Incorporated by
              reference from Exhibit 10.8 to the Company's Annual Report on
              Form 10-K for the fiscal year ended March 31, 1989.)

    10.5      Amendment No. 3 to License and Cooperative Development Agreement
              dated October 24, 1995 between the Company and Nycomed Imaging
              AS. (Incorporated by reference from Exhibit 10.3 to the Company's
              Quarterly Report on Form 10-Q/A  for the quarterly period ended
              December 31, 1995.)

    10.6      Amended and Restated Distribution Agreement dated September 7,
              1995 between the Company and Mallinckrodt Medical, Inc.
              (Incorporated by reference from Exhibit 10.1 to the Company's
              Quarterly Report on Form 10-Q for the quarterly period ended
              December 31, 1995.)

    10.7*     Amendment to Amended and Restated Distribution Agreement dated
              November  4, 1996 between the Company and Mallinckrodt Medical,
              Inc.

    10.8      Investment Agreement dated December 7, 1988 between the Company
              and Mallinckrodt Medical, Inc.(Incorporated by reference from
              Exhibit 10.9 to the Company's Annual Report on form 10-K for the
              fiscal year ended March 31, 1989.)

    10.9      Investment Agreement dated September 7, 1995 between the Company
              and Mallinckrodt Medical, Inc. (Incorporated by reference from
              Exhibit 10.2 to the Company's Quarterly Report on Form 10-Q/A for
              the quarterly period ended December 31, 1995.)

    10.10     Letter Agreement dated February 18, 1991 between the Company and
              Schering Aktiengesellschaft.  (Incorporated by reference from
              Exhibit 10.9 to the Company's Annual Report of Form 10-K for the
              fiscal year ended March 31, 1991.)

    10.11*    Settlement Agreement and Mutual Release dated September 10, 1996
              between the Company and Shionogi & Co., Ltd.

    10.12     Exclusive License Agreement dated April 1, 1992 between the
              Company and The Regents of the University of California.
              (Incorporated by reference from Exhibit 10.30 to the Company's
              Annual Report on Form 10-K for the fiscal year ended March 31,
              1992.)

    10.13     License Agreement dated August 23, 1991 between the Johns Hopkins
              University, Towson State University and the Company.
              (Incorporated by reference from Exhibit 10.31 to the Company's
              Annual Report on Form 10-K for the fiscal year ended March 31,
              1992.)


                                          59


<PAGE>

                                                                    Sequentially
                                                                      Numbered
EXHIBIT DESCRIPTION                                                     PAGE
- -------------------                                                     ----

    10.14     License Agreement dated November 11, 1991 between the Company and
              the Regents of the University of Michigan.  (Incorporated by
              reference from Exhibit 10.32 to the Company's Annual Report on
              Form 10-K for the fiscal year ended March 31, 1992.)

    10.15     Exclusive License Agreement dated July 31, 1990 between the
              Company and the Regents of the University of California, and
              Amendment Agreement dated April 1, 1992.  (Incorporated by
              reference from Exhibit 10.33 to the Company's Annual Report on
              Form 10-K for the fiscal year ended March 31, 1992.)

    10.16     License Option Agreement dated January 29, 1993 between the
              Company and Abbott Laboratories. (Incorporated by reference from
              Exhibit 10.1 to the Company's Current Report on Form 8-K dated
              January 29, 1993.)

    10.17     License Termination Agreement dated September 18, 1995 between
              Dendritech, Inc., Michigan Molecular Institute and the Company.
              (Incorporated by reference from Exhibit 10.24 to the Company's
              Annual Report on Form 10-K for the fiscal year ended March 31,
              1996.)

    10.18+    Molecular Biosystems, Inc. Pre-1984 Nonstatutory Stock Option
              Plan. (Incorporated by reference from Exhibit 10.11 to the
              Company's Annual Report on Form 10-K for the fiscal year ended
              March 31, 1989.)

    10.19+    Molecular Biosystems, Inc. 1984 Incentive Stock Option Plan and
              1984 Nonstatutory Stock Option Plan, as amended by First and
              Second Amendments. (Incorporated by reference from Exhibit 10.15
              to the Company's Annual Report on Form 10-K for the fiscal year
              ended March 31, 1988.)

    10.20+    Third and Fourth Amendments to Molecular Biosystems, Inc. 1984
              Incentive Stock Option Plan and 1984 Nonstatutory Stock Option
              Plan.  (Incorporated by reference from Exhibit 10.13 to the
              Company's Annual Report on Form 10-K for the fiscal year ended
              March 31, 1989.)

    10.21+    Fifth Amendment to Molecular Biosystems, Inc. 1984 Incentive
              Stock Option Plan and 1984 Nonstatutory Stock Option Plan.
              (Incorporated by reference from Exhibit 10.15 to the Company's
              Annual Report on Form 10-K for the fiscal year ended March 31,
              1990.)

    10.22+    Sixth and Seventh Amendments to Molecular Biosystems, Inc. 1984
              Incentive Stock Option Plan and 1984 Nonstatutory Stock Option
              Plan. (Incorporated by reference from Exhibit 10.15 to the
              Company's Annual Report on Form 10-K for the fiscal year ended
              March 31, 1991.)

    10.23+    Eighth and Ninth Amendments to Molecular Biosystems, Inc. 1984
              Incentive Stock Option Plan and 1984 Nonstatutory Stock Option
              Plan.  (Incorporated by reference from Exhibit 10.25 to the
              Company's Annual Report on Form 10-K for the fiscal year ended
              March 31, 1993.)



                                          60


<PAGE>

                                                                    Sequentially
                                                                      Numbered
EXHIBIT DESCRIPTION                                                     PAGE
- -------------------                                                     ----
    10.24+    Form of Stock Option Agreement used with the Company's 1984
              Incentive Stock Option Plan and 1984 Nonstatutory Stock Option
              Plan.  (Incorporated by reference from Exhibit 10.16 to the
              Company's Annual Report on Form 10-K for the fiscal year ended
              March 31, 1988.)

    10.25+    Molecular Biosystems, Inc. 1993 Stock Option Plan. (Incorporated
              by reference from Exhibit 4.2 to the Company's Registration
              Statement No. 33-78572 on Form S-8, dated May 3, 1994, filed on
              May 5, 1994.)

    10.26+    Form of Stock Option Agreement used with the Company's 1993 Stock
              Option Plan. (Incorporated by reference from Exhibit 10.33 to the
              Company's Annual Report on Form 10-K for the fiscal year ended
              March 31, 1994.)

    10.27+    Molecular Biosystems, Inc. 1993 Outside Directors Stock Option
              Plan.  (Incorporated by reference from Exhibit 4.2 to the
              Company's Registration Statement No. 33-78564 on Form S-8, dated
              May 3, 1994, filed on May 5, 1994.)

    10.28+    Form of Stock Option Agreement used with the Company's 1993
              Outside Directors Stock Option Plan. (Incorporated by reference
              from Exhibit 10.35 to the Company's Annual Report on Form 10-K
              for the fiscal year ended March 31, 1994.)

    10.29+    Employment Agreement dated April 25, 1995 between the
              Company and Kenneth J. Widder, M. D. (Incorporated by
              reference from Exhibit 10.30 to the Company's Annual Report
              on Form 10-K for the fiscal year ended March 31, 1995.)

    10.30+    Employment Agreement dated October 1, 1992 between the Company
              and James L. Barnhart, Ph.D. (Incorporated by reference from
              Exhibit 10.34 to the Company's Annual Report on Form 10-K for the
              fiscal year ended March 31, 1993.)

    10.31+    Employment Agreement dated April 1, 1994 between the Company
              and Gerard A. Wills.  (Incorporated by reference from
              Exhibit 10.39 to the Company's Annual Report on Form 10-K
              for the fiscal year ended March 31, 1995.)

    10.32+    Employment Agreement dated August 1, 1994 between the Company and
              Allan H. Mizoguchi. (Incorporated by reference from Exhibit 10.41
              to the Company's Annual Report on Form 10-K for the fiscal year
              ended March 31, 1995.)

    10.33+    Employment Agreement dated November 1, 1995 between the Company
              and Bobba Venkatadri. (Incorporated by reference from Exhibit
              10.41 to the Company's Annual Report on Form 10-K for the fiscal
              year ended March 31, 1996.)


                                          61


<PAGE>

                                                                    Sequentially
                                                                      Numbered
EXHIBIT DESCRIPTION                                                     PAGE
- -------------------                                                     ----

    10.34+*   First Amendment to Employment Agreement dated April 30, 1996
              between the Company and Bobba Venkatadri.

    10.35     Separation Agreement effective May 10, 1996 as amended on
              June 6, 1996 between the Company and Steven Lawson.
              (Incorporated by reference from Exhibit 10.45 to the
              Company's Annual Report on Form 10-K for the fiscal year
              ended March 31, 1996).

    10.36*    Partnership Agreement dated October 18, 1996 between the Company
              and Bobba and Annapurna Venkatadri.

    10.37     Sublease dated February 6, 1992 between the Company and Sunward
              Technologies, California.  (Incorporated by reference from
              Exhibit 10.27 to the Company's Annual Report on Form 10-K for the
              fiscal year ended March 31, 1992.)

    10.38     Triple Net Lease dated June 19, 1995 between the Company and
              Radnor/Collins/Sorrento Partnership. (Incorporated by reference
              from Exhibit 10.43 to the Company's Annual Report on Form 10-K
              for the fiscal year ended March 31, 1995.)

    10.39     First Amendment to Lease dated July 15, 1994 between the Company
              and Principal Mutual life Insurance Company. (Incorporated by
              reference from Exhibit 10.44 to the Company's Annual Report on
              Form 10-K for the fiscal year ended March 31, 1995.)

    10.40     Office Lease dated September 9, 1991 between the Company and The
              Principal Financial Group. (Incorporated by reference from
              Exhibit 10.28 to the Company's Annual Report on Form 10-K for the
              fiscal year ended March 31, 1992.)

    10.41     Promissory note dated December 31, 1993 between the Company and
              James L. Barnhart. (Incorporated by reference from Exhibit 10.48
              to the Company's Annual Report on Form 10-K for the fiscal year
              ended March 31, 1994.)

    10.42     Second Amendment to Promissory note dated June 24, 1996 between
              the Company and James L. Barnhart. (Incorporated by reference
              from Exhibit 10.52 to the Company's Annual Report on Form 10-K
              for the fiscal year ended March 31, 1996.)

    10.43     Promissory note dated December 31, 1993 between the Company and
              John W. Young. (Incorporated by reference from Exhibit 10.49 to
              the Company's Annual Report on Form 10-K for the fiscal year
              ended March 31, 1994.)


                                          62


<PAGE>

                                                                    Sequentially
                                                                      Numbered
EXHIBIT DESCRIPTION                                                     PAGE
- -------------------                                                     ----

    19   Documents not previously filed are marked with an asterisk (*).

    23*  Consent of Arthur Andersen LLP.


(b)      REPORTS ON FORM 8-K

         A Current Report on Form 8-K dated April 21,1997, was filed on May 9,
         1997, reporting (1) Stay of Action by the FDA, (2) the Brand Name
         announced for FS069, and (3) the Company's patent matters.


                                          63

<PAGE>

                                                                    Exhibit 10.7


                                  AMENDMENT NO. 1 TO

                     AMENDED AND RESTATED DISTRIBUTION AGREEMENT

    This Amendment is entered into as of November 4, 1996 by Mallinckrodt
Medical, Inc., a Delaware corporation having offices at 675 McDonnell Boulevard,
Post Office Box 5840, St. Louis, Missouri 63134 ("Mallinckrodt"), and Molecular
Biosystems, Inc., a Delaware corporation having offices at 10030 Barnes Canyon
Road, San Diego, California 92121 ("MBI").

                                       PREAMBLE

    A.   Mallinckrodt and MBI are parties to an Amended and Restated
Distribution Agreement dated as of September 7, 1995 ("ARDA").  Capitalized
terms which are not defined in this Amendment have the same meanings that they
have in ARDA.

    B.   Section 3.03(a) of ARDA requires MBI to use reasonable efforts to
enter into the Nycomed License Amendment with Nycomed in order to obtain
Nycomed's ALBUNEX rights in the Nycomed Territory and, if successful, to
transfer those rights to Mallinckrodt on the terms agreed to in a Nycomed
Territory Amendment.

    C.   MBI and Nycomed have entered into Amendment No. 3 to License and
Cooperative Development Agreement, dated as of October 24, 1995 (the "Nycomed
License Amendment"), pursuant to which MBI reacquired substantially all of
Nycomed's ALBUNEX rights in the Nycomed Territory.

    D.   Mallinckrodt and MBI desire to enter into the Nycomed Territory
Amendment, as contemplated by Section 3.03 of ARDA, pursuant to the provisions
of Section 16.07 of ARDA, and to amend ARDA in certain other respects.

    Now, therefore, in consideration and their mutual promises, the parties
agree as follows:

                                      ARTICLE 1

                                     DEFINITIONS

    As used in this Amendment, and as used in ARDA as amended by this
Amendment, the following terms have these meanings:

         (a)  AGGREGATE NET SALES, as used in Section 2.9 of this Agreement,
    means the sum of Mallinckrodt's Net Sales of each Separate Product plus the
    net sales (calculated in the same manner as Mallinckrodt's Net Sales) of
    all other sellers of the Separate Product in question.


<PAGE>

         (b)  ARDA is defined in the Paragraph A of the Preamble to this
    Amendment.  Unless


<PAGE>

    otherwise qualified, references to ARDA in this Amendment mean ARDA prior
    to its amendment by this Amendment.

         (c)  CLINICAL REVIEW is defined in Section 2.16(1) of ARDA (as amended
    by Article 3 of this Amendment).

         (d)  COMPETITIVE PRODUCT means, in respect of particular Related
    Albunex Products, an IN VIVO contrast agent for ultrasound imaging which is
    approved for sale in the Index Country by a third party for substantially
    the same indication or indications for which the Related Albunex Products
    are approved for sale.  The term "Competitive Product" includes all
    finishes of the product.

         (e)  CURRENT PRODUCT means ALBUNEX with substantially the same
    specifications and other characteristics approved for sale in the United
    States as of October 1, 1996, regardless of the indication for which it is
    approved for used.

         (f)  DR. FEINSTEIN means Steven B. Feinstein, M.D., or, as the context
    may require, his designee for payments under the Feinstein License.

         (g)  EFFECTIVE DATE, as used in this Amendment (but not as used in
    ARDA), means the date that this Amendment is signed by both parties.

         (h)  FEINSTEIN LICENSE means the Restated License Agreement, dated as
    of June 1, 1989, between MBI and Dr. Feinstein, as amended by a letter
    agreement dated June 14, 1994 (relating to Dr. Feinstein's designation of a
    different payee for MBI's payments).

         (i)  FS means ALBUNEX described as "FS069" in the second full
    paragraph of Section 1.04 of ARDA.

         (j)  INDEX COUNTRY means France, Germany, Italy, Spain or the United
    Kingdom or, collectively, all of the remaining countries in the Nycomed
    Territory.

         (k)  JOINT MARKETING TEAM is defined in Section 2.16(e) of ARDA (as
    amended by Article 3 of this Amendment).

         (l)  MARKETING REVIEW is defined in Section 2.16(2) of ARDA (as
    amended by Article 3 of this Amendment).

         (m)  NYCOMED LICENSE AMENDMENT is defined in Paragraph C of the
    Preamble to this Amendment.

         (n)  PRIMARY MEASUREMENT PERIOD means, in respect of any Related
    Albunex Products, (i) the first to occur of:

              (1)  the period of 12 consecutive calendar months beginning with
         the month


                                         -3-


<PAGE>

         which is the same number of months following the month of the first
         commercial sale of any Related Albunex Product as the number of months
         by which the month of the first commercial sale of a Competitive
         Product preceded the month of the first commercial sale of the Related
         Albunex Product, or

              (2)  the period of 12 consecutive calendar months beginning with
         the month following the month of the first commercial sale of any
         Related Albunex Product if, at the time of such sale, there have been
         no commercial sales of any Competitive Product, and

    (ii) each of the next two successive periods of 12 consecutive calendar
    months.  For purposes of clause (i)(1), each whole or partial month shall
    count as one month.

         (o)  RELATED ALBUNEX PRODUCTS means, in respect of an Index Country,
    all Albunex Products for a particular indication, of any vial size, which
    are sold or offered for sale in that Index Country.  For purposes of this
    definition only, the term "Albunex Products" does not include Albunex
    Products consisting of the Current Product or Infoson.

         (p)  SECONDARY MEASUREMENT PERIOD means, in respect of any Primary
    Measurement Period, the period of six consecutive calendar months beginning
    with the calendar month following the month in which, pursuant to Section
    3.02B(b) of ARDA, MBI requests such period to start.

         (q)  SEPARATE PRODUCT is defined in Section 2.5 of this Amendment.

                                      ARTICLE 2

                             NYCOMED TERRITORY AMENDMENT

    2.1  IDENTIFICATION.  This Amendment constitutes the "Nycomed Territory
Amendment" as that term is defined in Section 3.03(a) of ARDA.  As of the
Effective Date, Mallinckrodt's appointment in Section 3.01(c) of ARDA as the
exclusive distributor and exclusive sales representative for ALBUNEX to be sold
in and throughout the Nycomed Territory, and all of the other provisions of ARDA
relating to the parties' respective rights and duties in the Nycomed Territory
(as those provisions may be amended by this Amendment), shall become effective,
without the necessity of any further action by either party.

    2.2  UPFRONT PAYMENT.  Pursuant to Section 3.1 of the Nycomed License
Amendment, MBI paid $700,000 to Nycomed upon the parties' execution of the
Nycomed License Amendment, and pursuant to Section 3.2 of the Nycomed License
Amendment, MBI paid an additional $2 million to Nycomed on or about March 31,
1996.  On December 17, 1996, Mallinckrodt shall pay $2.7 million to MBI by wire
transfer.

    2.3  MILESTONE PAYMENTS.  Sections 2.17(a) and (b) of ARDA provide that
Mallinckrodt shall pay to MBI "$3 million on the date when the Nycomed Territory
Amendment [I.E., this


                                         -4-


<PAGE>

Amendment] becomes effective" and "$4 million upon the first commercial sale of
ALBUNEX in Germany by Mallinckrodt ... for an approved intravenous myocardial
perfusion indication ...."  Section 3.3 of the Nycomed License Amendment
provides that MBI shall pay to Nycomed "45% of any amounts in excess of
$2,700,000 received by MBI in either up-front, milestone or similar payments
from third parties" in consideration for MBI's grant of ALBUNEX rights in the
Nycomed Territory.  The payments that Mallinckrodt is required to make pursuant
to Sections 2.17(a) and (b) of ARDA will constitute "amounts in excess of
$2,700,000" for purposes of Section 3.3 of the Nycomed License Amendment.
Accordingly:

         (a)  on December 17, 1996, Mallinckrodt shall pay $3 million to MBI by
    wire transfer, pursuant to Section 2.17(a) of ARDA;

         (b)  on or before January 16, 1997, Mallinckrodt shall pay $1.35
    million (or 45% of $3 million) to Nycomed in satisfaction of Nycomed's
    claims under Section 3.3 of the Nycomed License Amendment in respect of
    Mallinckrodt's payment of $3 million to MBI pursuant to Section 2.17(a) of
    ARDA;

         (c)  within five days after the date of the first commercial sale of
    ALBUNEX in Germany by Mallinckrodt or an Affiliate of Mallinckrodt which is
    specifically approved for an intravenous myocardial perfusion indication,
    Mallinckrodt shall pay $4 million to MBI pursuant to Section 2.17(b) of
    ARDA; and

         (d)  within 30 days after the date of the first commercial sale of
    ALBUNEX in Germany by Mallinckrodt or an Affiliate of Mallinckrodt for an
    approved intravenous myocardial perfusion indication, Mallinckrodt shall
    pay $1.8 million (or 45% of $4 million) to Nycomed in satisfaction of
    Nycomed's claims under Section 3.3 of the Nycomed License Amendment in
    respect of Mallinckrodt's payment of $4 million to MBI pursuant to Section
    2.17(b) of ARDA.

    2.4  ROYALTIES TO MBI ON SALES OF INFOSON.  Section 2.14 of ARDA deals with
the price to be paid by Mallinckrodt to MBI for ALBUNEX (including Infoson)
manufactured by MBI.  ARDA does not deal with royalty payable by Mallinckrodt to
MBI in respect of Mallinckrodt's Net Sales of Infoson manufactured by Nycomed.
Section 7.01(c)(1)(E) of ARDA provides that the royalty payable by Mallinckrodt
to MBI in respect of Mallinckrodt's Net Sales of Infoson manufactured by
Mallinckrodt shall be the royalty agreed on in this Amendment.  In regard to
these latter two royalties:

         (a)  Mallinckrodt shall pay MBI a royalty in respect of Mallinckrodt's
    Net Sales of Infoson purchased from Nycomed equal to 40% of the amount
    determined by subtracting from Mallinckrodt's gross profits in respect of
    such sales the direct selling costs attributable to such sales (but not
    including any royalties directly or indirectly payable to Nycomed pursuant
    to Section 2.5 of this Amendment or to Dr. Feinstein pursuant to Section
    2.6 of this Amendment), as Mallinckrodt's gross profits and direct selling
    costs are determined using U.S. generally accepted accounting principles.


                                         -5-


<PAGE>

         (b)  Mallinckrodt shall pay MBI a royalty in respect of Mallinckrodt's
    Net Sales of Infoson manufactured by Mallinckrodt pursuant to Sections
    2.05(c) and 7.01(c)(1)(E) of ARDA equal to 40% of the product determined by
    multiplying each Infoson Product's Average Selling Price during the quarter
    of sale by the number of vials of that product sold, less the sum of (i)
    Mallinckrodt's fully allocated manufacturing cost for that Infoson Product
    determined using U.S. generally accepted accounting principles and (ii)
    until fully recovered, one-half of Mallinckrodt's Start-up Costs which are
    not included in (i); but in no event shall the royalty be less than 15% or
    more than 25%.  "Infoson Products" shall be determined in the same manner
    that Albunex Products are determined under Section 1.05 of ARDA, and the
    "Average Selling Price" of Infoson Products shall be determined in the same
    manner that the Average Selling Price of Albunex Products is determined
    under Section 1.06 of ARDA.

         (c)  Royalties payable under this Section 2.4 shall be paid pursuant
    to the procedures in Sections 7.01(c)(2)(E) and (F) of ARDA.

    2.5  ROYALTIES TO NYCOMED.  Section 3.5 of the Nycomed License Amendment
provides that, for the remaining term of the Nycomed License Amendment, MBI
shall pay Nycomed a royalty of 2.5% on the first $30 million of the Net Selling
Price of Licensed Products sold in the Nycomed Territory each year and 3.5% on
the Net Selling Price of Licensed Products on sales in excess of $30 million
each year (as "Net Selling Price" is defined in Section 3.5.1 of the Nycomed
License Amendment and "Licensed Product" is defined in Section I.B of the
Nycomed Agreement).  Section 3.5 of the Nycomed License Amendment also provides
that "[a] separate royalty shall be payable in respect of each Licensed
Product." For purposes of this Amendment, the following products shall be
considered separate Licensed Products ("Separate Products"): (i) Infoson; (ii)
the Current Product and any substantially similar formulation; (iii) FS and any
substantially similar formulation; and (iv) any other formulation of ALBUNEX
which is not substantially similar to Infoson, the Current Product or FS.
Subject to Section 2.9 of this Amendment, Mallinckrodt shall pay to MBI, for
payment to Nycomed, the following royalty on Net Sales of ALBUNEX in the Nycomed
Territory:

         (a)  a royalty of 1.5% (= 2.5% x 0.60) on the first $30 million of Net
    Sales of each Separate Product each calendar year; and

         (b)  a royalty of 2.1% (= 3.5% x 0.60) on Net Sales of each Separate
    Product each calendar year in excess of $30 million.

Royalties payable under this Section 2.5 shall be paid pursuant to the
procedures in Section 7.01 (c)(2)(E) and (F) of ARDA.

    2.6  ROYALTIES TO DR. FEINSTEIN.  Section 5.2 of the Feinstein License
requires MBI to pay Dr. Feinstein a royalty of 1.25% of the Net Selling Price of
Licensed Products sold by sublicensees of MBI or by an affiliate of any such
sublicensee in any country other than the United States (as "Net Selling Price"
and "Licensed Products" are defined in Sections 1.4 and 1.2, respectively, of
the Feinstein License).  Subject to Section 2.9 of this Amendment,


                                         -6-


<PAGE>

Mallinckrodt shall pay to MBI, for payment to Dr. Feinstein, a royalty of 0.75%
(= 1.25% x 0.60) on Net Sales of ALBUNEX in the Nycomed Territory.  Royalties
payable under this Section 2.6 shall be paid pursuant to the procedures in
Section 7.01(c)(2)(E) and (F) of ARDA.

    2.7  SUPPLY AGREEMENT WITH NYCOMED.  Section 5 of Nycomed License Amendment
provides that, at MBI's option, MBI and Nycomed shall enter into a supply
agreement for Infoson.  If MBI and Mallinckrodt determine that it is advisable
for Mallinckrodt to enter into such an agreement directly with Nycomed, and if
Mallinckrodt or Nycomed deems it necessary or advisable, MBI shall waive its
rights pursuant to Section 5 of Nycomed License Amendment.

    2.8  SHIPMENT.  MBI shall ship ALBUNEX for sale in the Nycomed Territory in
a commercially reasonable manner from MBI's warehouse to any one site in the
Nycomed Territory designated by Mallinckrodt.  Mallinckrodt and MBI shall share
on a 60%-40% basis, respectively, in all shipping costs to any such designated
site and in all labelling costs of such ALBUNEX.  Title to the product shipped
shall pass to Mallinckrodt upon shipment from MBI's warehouse.

    2.9  SURVIVAL OF ROYALTY AND OTHER OBLIGATIONS.

    (a)  If Mallinckrodt exercises its manufacturing rights under Section
7.01(c)(1)(A) of ARDA:

         (1)  Mallinckrodt's royalty obligation to MBI pursuant to Section 2.5
    of this Amendment shall be considered modified to provide for a payment to
    MBI, in respect of each Separate Product, of a percentage of the royalty
    due to Nycomed under Section 3.5 of the Nycomed License Amendment in
    respect of that Separate Product.  This percentage shall be equal to the
    product of (i) the quotient obtained by dividing Mallinckrodt's Net Sales
    of the Separate Product by the Aggregate Net Sales of the Separate Product
    multiplied by (ii) 100.  The parties shall report their respective portions
    of the Aggregate Net Sales of each Separate Product to one another for
    purposes of calculating the applicable percentage under this Section
    2.9(a)(1).

         (2)  Mallinckrodt's royalty obligation to MBI pursuant to Section 2.6
    of this Amendment, shall survive and continue, for as long as a royalty
    remains payable by MBI under Section 5.2 of the Feinstein License, except
    that Mallinckrodt's payments to MBI shall be the entire amount of the
    royalty due to Dr. Feinstein under 5.2(b) of the Feinstein License in
    respect of Licensed Products (as "Licensed Products" defined in Section 1.2
    of the Feinstein License) manufactured and sold by Mallinckrodt in the
    Nycomed Territory (as provided in Sections 4.03(a) and 14.04 of ARDA).

    (b)  If ARDA, as amended by this Amendment, terminates following notice
from Mallinckrodt pursuant to Sections 14.02(b), (c), or (e) of ARDA, then in
addition to the other effects described in Section 14.03 of ARDA:


                                         -7-


<PAGE>

         (1)  Mallinckrodt's royalty obligation to MBI pursuant to Section 2.4
    of this Amendment shall survive and continue until the later of the third
    anniversary of the date that the FDA approves an intravenous myocardial
    perfusion indication of ALBUNEX for sale in the United States or July 1,
    2003.

         (2)  Mallinckrodt's royalty obligation to MBI pursuant to Section 2.5
    of this Amendment shall survive and continue, for as long as a royalty
    remains payable by MBI under Section 3.5 of the Nycomed License Amendment,
    except that until the latest of (i) the third anniversary of the date that
    the FDA approves an intravenous myocardial perfusion indication of ALBUNEX
    for sale in the United States, (ii) July 1, 2003 or (iii) termination of
    ARDA, the royalty payable by Mallinckrodt on Net Sales of ALBUNEX in the
    Nycomed Territory shall be:

              (a)  on the first $30 million of Net Sales of each Separate
         Product for each calendar year, the greater of (i) 1.5% or (ii) 2.5%
         minus an amount equal to the royalty payable by Mallinckrodt to MBI
         under Section 7.01(c)(1)(B) of ARDA in respect of that Separate
         Product; and

              (b)  on Net Sales of each Separate Product for each calendar year
         in excess of $30 million, the greater of (i) 2.1% or (ii) 3.5% minus
         an amount equal to the royalty payable by Mallinckrodt to MBI under
         Section 7.01(c)(1)(B) of ARDA in respect of that Separate Product.

    After such date, Mallinckrodt shall pay MBI a percentage of the royalty due
    to Nycomed under Section 3.5 of the Nycomed License Amendment in respect of
    each Separate Product.  For each Separate Product, this percentage shall be
    equal to the product of (i) the quotient obtained by dividing
    Mallinckrodt's Net Sales of the Separate Product by the Aggregate Net Sales
    of the Separate Product multiplied by (ii) 100.  The parties shall report
    their respective portions of the Aggregate Net Sales of each Separate
    Product to one another for purposes of calculating the applicable
    percentage under this Section 2.9(b)(2).

         (3)  Mallinckrodt's royalty obligation to MBI pursuant to Section 2.6
    of this Amendment, shall survive and continue, for as long as a royalty
    remains payable by MBI under Section 5.2 of the Feinstein License, except
    that Mallinckrodt's payments to MBI shall be the entire amount of the
    royalty due to Dr. Feinstein under 5.2(b) of the Feinstein License in
    respect of Licensed Products (as "Licensed Products" defined in Section 1.2
    of the Feinstein License) manufactured and sold by Mallinckrodt in the
    Nycomed Territory.

    (c)  If ARDA, as amended by this Amendment, terminates following notice
from MBI pursuant to Sections 14.02(b), (d), or (f) of ARDA, then in addition to
the other effects described in Section 14.03 of ARDA:

         (1)  Mallinckrodt's royalty obligation to MBI pursuant to Section 2.4
    of this


                                         -8-


<PAGE>

    Amendment shall survive and continue until the expiration of the last
    patent relating to ALBUNEX to expire.

         (2)  Mallinckrodt's royalty obligation to MBI pursuant to Section 2.5
    of this Amendment shall survive and continue, for as long as a royalty
    remains payable by MBI under Section 3.5 of the Nycomed License Amendment,
    except that Mallinckrodt's payments to MBI shall be a percentage of the
    royalty due to Nycomed under Section 3.5 of the Nycomed License Amendment
    in respect of each Separate Product.  For each Separate Product, this
    percentage shall be equal to the product of (i) the quotient obtained by
    dividing Mallinckrodt's Net Sales of the Separate Product by the Aggregate
    Net Sales of the Separate Product multiplied by (ii) 100.  The parties
    shall report their respective portions of the Aggregate Net Sales of each
    Separate Product to one another for purposes of calculating the applicable
    percentage under this Section 2.9(c)(2).

         (3)  Mallinckrodt's royalty obligation to MBI pursuant to Section 2.6
    of this Amendment shall survive and continue, for as long as a royalty
    remains payable by MBI under Section 5.2 of the Feinstein License, except
    that Mallinckrodt's payments to MBI shall be the entire amount of the
    royalty due to Dr. Feinstein under 5.2(b) of the Feinstein License in
    respect of Licensed Products (as "Licensed Products" is defined in Section
    1.2 of the Feinstein License) manufactured and sold by Mallinckrodt in the
    Nycomed Territory.

    2.10 MBI WAIVERS.  If either Mallinckrodt or Nycomed considers it necessary
or advisable, in order to permit Mallinckrodt to enter into an agreement with
Nycomed to assume Nycomed's responsibility for product registration activities
or clinical studies, MBI shall (a) execute the notice required by Section 4.1 of
the Nycomed License Amendment to permit Nycomed to terminate all of its
registration activities and (b) execute the notice required by Section 4.2 of
the Nycomed License Amendment to permit Nycomed to discontinue work on the
clinical studies.  In either case, the notice shall be effective as of the date
that Mallinckrodt assumes such responsibility.

    2.11 MAINTENANCE OF AMENDMENT.  MBI shall take such actions as are
necessary and advisable to maintain the Nycomed License Amendment in force,
including, but not limited to, paying all royalties and other sums due to
Nycomed.  MBI shall give Mallinckrodt 10 business days' prior written notice of
any proposed amendment or modification of the Nycomed License Amendment and
shall not enter into any such amendment or modification that adversely affects
Mallinckrodt without Mallinckrodt's prior written consent.

                                      ARTICLE 3

                            AMENDMENT OF ARTICLE 2 OF ARDA

    Paragraph 2.16 of ARDA is amended to read as follows:

         2.16 JOINT STEERING COMMITTEE.  MBI and Mallinckrodt shall establish a
    joint


                                         -9-


<PAGE>

    steering committee (the "Joint Steering Committee"), which shall have two
    functions:

         (1)  to review, on a quarterly basis (or more frequently as requested
         by either party), clinical trial programs relating to the development
         and regulatory approval of ALBUNEX, with a particular emphasis on
         reviewing the design and implementation of clinical trials and any
         Investigational Device Exemption or Investigational New Drug
         applications to the FDA (including related amendments and other
         ancillary filings) and corresponding filings with foreign equivalents
         of the FDA ("Clinical Review"); and

         (2)  to review, on a quarterly basis (or more frequently as requested
         by either party), the development and implementation of marketing
         plans, strategies and budgets in the Territory, the Additional
         Territory and the Nycomed Territory ("Marketing Review").

    In respect of Clinical Review, the Committee is intended to provide a
    mechanism to enable the parties to share their expertise and concerns
    relating to clinical programs, regulatory affairs and cost-effectiveness
    and reimbursement issues, and shall have significant authority and
    flexibility in determining the objectives, number, design and other
    features of clinical trials, with a view to maximizing the return on
    development costs and expediting commercialization.  In respect of
    Marketing Review, the Committee is intended to provide a mechanism to
    enable the parties, consistent with the other provisions of this Agreement,
    to gather and share marketing and other information that will enable them
    to plan and implement marketing strategies designed to accomplish their
    mutual goals of (i) obtaining market leadership and maximizing distribution
    of ALBUNEX in the Territory, the Additional Territory and the Nycomed
    Territory, and in particular countries within each territory, and (ii)
    obtaining a superior return on their respective investments while balancing
    the expenses of marketing, advertising, selling and distribution against
    expected increases in sales and profits.  In this regard, the parties
    recognize that market conditions in each territory, and in particular
    countries within each territory, are constantly changing, and that
    Marketing Review is intended to be a dynamic and continuing process.

    The Committee shall consist of equal numbers of MBI and Mallinckrodt
    representatives (up to a maximum of three representatives from each party)
    and shall adopt procedures to govern its activities substantially in the
    form described on Appendix 7.  The parties shall give prompt written notice
    to one another of any changes in their respective representatives on the
    Committee.

         (a)  The Joint Steering Committee shall have the authority to specify
    the clinical trials and other activities required to be performed under
    Section 2.15(b) and the additional clinical trials required to be performed
    under Section 2.15(c), and MBI shall not make any expenditure under either
    of those Sections without the Committee's prior authorization. The
    Committee shall have no authority regarding the allocation or expenditure
    of the $10 million that MBI is required to spend under Section 2.15(d) (or


                                         -10-


<PAGE>

    any other expenditures by MBI).

         (b)  The Joint Steering Committee's decisions shall be guided by the
    following principles, emphasizing both quality and speed:

              (1)  it is very important to bring a product to market in the
         shortest possible time consistent with the prevailing regulatory
         climate (but the quality of the clinical program, including clinical
         utility and cost-effectiveness, is equally important);

              (2)  it is important that clinical studies be conducted and their
         results presented in a thorough, well-organized and professional
         manner;

              (3)  the Committee's decisions should be made with a sense of
         urgency consistent with the prevailing regulatory climate, applying
         the standard of a prudent businessman who has a lead over his
         competitors and wants to maintain that lead, and with a view towards
         operating by consensus and in a manner intended to emphasize
         partnership and a commonality of interests; and

              (4)  it is important to achieve the broadest possible market
         penetration in each significant market at the earliest possible date,
         consistent with a responsibly conducted product launch.

         (c)  In the event of a dispute over a matter relating to Clinical
    Review that cannot be resolved by the Committee, MBI and Mallinckrodt shall
    attempt to resolve the dispute informally in light of the guiding
    principles in Section 2.16(b).  If MBI and Mallinckrodt are unable to
    resolve the dispute, they shall each designate as a referee an unaffiliated
    person with senior-level credentials in the medical, scientific, clinical
    and administrative areas relevant to the Committee's activities, and the
    two referees shall attempt to resolve the dispute.  If they are unable to
    do so within a reasonable period, they shall jointly appoint a third person
    with similar qualifications to act as an arbitrator.  In reaching a
    decision, the arbitrator shall take into account such matters as he
    considers appropriate, and may require the parties to provide a written
    statement or oral presentation in support of their respective positions.
    The arbitrator's decision shall be binding on MBI and Mallinckrodt.  During
    the pendency of the dispute, (i) Mallinckrodt shall not withhold (and
    neither the referees nor any arbitrator appointed by them shall have
    authority to excuse or delay) any payments due from Mallinckrodt to MBI
    under this Agreement and (ii) MBI shall deposit all payments received from
    Mallinckrodt under Section 2.15 during the pendency of the dispute in a
    segregated account in MBI's name.  This account may be invested in
    short-term U.S. Treasury obligations or in any other manner approved by
    Mallinckrodt (which shall not unreasonably withhold its approval), and MBI
    may transfer the earnings to its general operating accounts.  MBI and
    Mallinckrodt shall each pay the fees and expenses of its own referee and
    one-half of the fees and expenses of any arbitrator that the two referees
    appoint.

         (d)  In the event of a dispute over a matter relating to Marketing
    Review that cannot be resolved by the Committee, MBI and Mallinckrodt shall
    attempt to resolve the dispute


                                         -11-


<PAGE>

    informally in light of the guiding principles in Section 2.16(b).  If MBI
    and Mallinckrodt are unable to resolve the dispute, the dispute shall not
    be referred to referees or subject to arbitration (under Section 2.16(c),
    Section 12.01 or otherwise) and Mallinckrodt's position shall be
    controlling (as long as it does not involve any cash expenditure by MBI).

         (e)  In order to assist the Joint Steering Committee in its Marketing
    Review, MBI and Mallinckrodt shall establish a joint marketing team (the
    "Joint Marketing Team") to make recommendations to the Joint Steering
    Committee regarding the timing, budget, manner and other considerations
    relevant to the contemplated product launch of ALBUNEX (including, but not
    limited to, the Current Product) in any territory or in a particular
    country or countries within any territory.  These recommendations may
    include the use of co-promotion strategies, if considered appropriate.  The
    Joint Marketing Team shall consist of equal numbers of MBI and Mallinckrodt
    representatives and shall adopt procedures to govern its activities
    substantially similar to the procedures adopted by the Joint Marketing Team
    to govern its activities.  The Joint Marketing Team will engage the
    services of an independent marketing consultant to give advice regarding
    the product launch of FS in the Territory and the Nycomed Territory.  The
    consulting firm appointed by the Joint Steering Committee shall have a
    national or international reputation.  Mallinckrodt shall pay the fees and
    expenses of the consulting firm appointed under this Section 2.16(e) but
    MBI and Mallinckrodt shall jointly own all reports and studies prepared by
    such consulting firm pursuant to its appointment under this Section 2.16.

         (f)  The authority of the Joint Steering Committee in respect of
    Clinical Review shall continue indefinitely but shall cease upon 30 days'
    prior written notice from Mallinckrodt or MBI to the other given at any
    time after the latest of:  (i) the date that ALBUNEX is approved for sale
    in the United States and in the European Union for an intravenous
    myocardial perfusion indication; (ii) the date that ALBUNEX is approved for
    sale in the United States and in the European Union for a radiology
    indication; (iii) the date that MBI has expended, in accordance with the
    direction of the Joint Steering Committee (by a unanimous vote of its
    members), the $10 million that MBI is required to spend under Section
    2.15(b) and the $5 million that MBI may be required to spend under Section
    2.15(c) (as this latter amount may be increased by agreement of the
    parties); or (iv) the date that Mallinckrodt ceases to be the exclusive
    distributor and sales representative for ALBUNEX sold in and throughout any
    territory (except for sub-distributors appointed by Mallinckrodt or an
    Affiliate of Mallinckrodt).  The authority of the Joint Steering Committee
    in respect of Marketing Review shall continue indefinitely but shall cease
    in respect of Marketing Review for any territory on the date that
    Mallinckrodt ceases to be the exclusive distributor and sales
    representative for ALBUNEX sold in and throughout that territory (except
    for sub-distributors appointed by Mallinckrodt or an Affiliate of
    Mallinckrodt).

                                      ARTICLE 4


                                         -12-


<PAGE>

                            AMENDMENT OF ARTICLE 3 OF ARDA

    4.1  NEW SECTION 3.02B.  The following provision is added as Section 3.02B
of ARDA:

         3.02B   ADDITIONAL QUALIFICATION ON EXCLUSIVITY IN NYCOMED TERRITORY.
    Mallinckrodt's appointment under Section 3.01(c) as the exclusive
    distributor and exclusive sales representative for ALBUNEX sold in and
    throughout the Nycomed Territory is subject to the additional qualification
    that:

              (1)  if one or more Competitive Products are being sold in an
         Index Country; and

              (2)  if Mallinckrodt's sales of Related Albunex Products in that
         Index Country during any Primary Measurement Period do not equal or
         exceed 100% of the sales in that Index Country of the Competitive
         Product having the highest sales (by revenues) during the same period;
         and

              (3)  pursuant to Section 3.02B(b), MBI requests the Secondary
         Measurement Period to start; and

              (4)  if Mallinckrodt's sales of the same Related Albunex Products
         during the Secondary Measurement Period, as reported to the Joint
         Steering Committee by Mallinckrodt pursuant to Section 3.02B(b) or by
         an independent marketing consultant pursuant to Section 3.02B(c), do
         not equal or exceed 100% of the sales of the Competitive Product
         having the highest sales (by revenues) during the same period,

    then MBI shall have the right to require Mallinckrodt to appoint a third
    party designated by MBI and approved by Mallinckrodt (whose approval shall
    not be unreasonably withheld) as a distributor of the Related Albunex
    Products in that Index Country, as provided in Section 3.02B(d).

         (a)  Mallinckrodt's sales of Related Albunex Products shall be
    measured by the aggregate Net Sales during the Primary or Secondary
    Measurement Period, as the case may be, of each of the separate Albunex
    Products comprising the Related Albunex Products.  Sales of Competitive
    Products shall be measured in a substantially equivalent manner.  If the
    necessary information is unavailable to permit sales of Competitive
    Products to be measured in a substantially equivalent manner, both
    Mallinckrodt's sales and sales of Competitive Products shall be measured
    using an alternative methodology acceptable to MBI and Mallinckrodt.

         (b)  Mallinckrodt shall monitor sales of all Competitive Products, if
    any, and shall informally report to the Joint Steering Committee at least
    quarterly on sales of Competitive Products and formally report to the
    Committee on sales of Competitive Products during each Primary Measurement
    Period as soon as the relevant information


                                         -13-


<PAGE>

    becomes available.  If Mallinckrodt's sales of Related Albunex Products in
    an Index Country during any Primary Measurement Period, as reported to the
    Joint Steering Committee by Mallinckrodt pursuant to this Section 3.02B(b)
    or by an independent marketing consultant pursuant to Section 3.02B(c), do
    not equal or exceed 100% of the sales in that Index Country of the
    Competitive Product having the highest sales (by revenues) during the same
    period, MBI may request the Secondary Measurement Period to start by
    written notice to Mallinckrodt within 30 days after the Joint Steering
    Committee's receipt of Mallinckrodt's report or the report of the
    independent marketing consultant, as the case may be.  Mallinckrodt shall
    report to the Joint Steering Committee on sales of all Competitive Products
    during the Secondary Measurement Period as soon as the relevant information
    becomes available.

         (c)  If MBI reasonably questions the accuracy of any report by
    Mallinckrodt to the Joint Steering Committee pursuant to Section 3.02B(b),
    the Joint Steering Committee shall promptly engage the services of an
    independent marketing consultant to review Mallinckrodt's report and
    independently determine sales of Competitive Products during the Primary or
    Secondary Measurement Period, as the case may be.  If the report by the
    independent marketing consultant confirms Mallinckrodt's report to the
    Joint Steering Committee, MBI shall pay the independent marketing
    consultant's fees and expenses; and if the report by the independent
    marketing consultant does not confirm Mallinckrodt's report to the Joint
    Steering Committee, Mallinckrodt shall pay the independent marketing
    consultant's fees and expenses.  Each consulting firm appointed by the
    Joint Steering Committee shall have a national or international reputation.

         (d)  MBI's right under this Section 3.02B to require Mallinckrodt to
    appoint a third party designated by MBI (and approved by Mallinckrodt) as a
    distributor of Related Albunex Products in an Index Country shall become
    exercisable, subject to Section 3.02B(e), if and when (i) pursuant to
    Section 3.02B(b), Mallinckrodt reports to the Joint Steering Committee, or
    (ii) pursuant to Section 3.02B(c), an independent marketing consultant
    reports to the Joint Steering Committee, that Mallinckrodt's sales of
    Related Albunex Products during the Secondary Measurement Period did not
    equal or exceed 100% of the sales of the Competitive Product having the
    highest sales (by revenues) during the same period.  If MBI's right becomes
    exercisable, MBI's right shall remain exercisable for a period of 180 days
    and may be exercised at any time during this period by written notice to
    Mallinckrodt.  If MBI exercises its right:

              (1)  Mallinckrodt shall promptly negotiate the terms of a
         distribution agreement with the third party designated by MBI (and
         approved by Mallinckrodt) and shall propose terms generally consistent
         with the terms of comparable distribution agreements that Mallinckrodt
         has entered into with other parties.  Mallinckrodt shall keep MBI
         reasonably informed of its negotiations with the third party.

              (2)  If for any reason any third party that MBI initially or
         subsequently designates (and Mallinckrodt approves) fails or refuses
         to enter into a distribution agreement with Mallinckrodt on the terms
         described in Section 3.02B(d)(1) within


                                         -14-


<PAGE>

         90 days after Mallinckrodt begins negotiations, MBI shall have the
         right, which may be exercised only once in respect of any Index
         Country, to designate a new third party (subject to Mallinckrodt's
         approval, which shall not be unreasonably withheld) with whom
         Mallinckrodt shall be required to negotiate a distribution agreement
         in accordance with this Section 3.02B(d).

    Any distribution agreement that Mallinckrodt otherwise may be required to
    enter into under this Section 3.02B(d) may be entered into by an Affiliate
    of Mallinckrodt.

         (e)  MBI's right under this Section 3.02B to require Mallinckrodt to
    appoint a third party designated by MBI (and approved by Mallinckrodt) as a
    distributor of Related Albunex Products in an Index Country shall not
    become exercisable under Section 3.02B(d) if:

              (1)  the Related Albunex Products are not substantially
         equivalent or superior in their clinical profiles (in terms of safety
         and efficacy) to the clinical profile of the Competitive Product
         having the highest sales (by revenues) during the Primary Measurement
         Period; or

              (2)  the approval (in respect of both regulatory approval and
         pricing approval) for the commercial sale in the Index Country of any
         Related Albunex Product did not occur within six months after the
         first commercial sale of the Competitive Product having the highest
         sales (by revenues) during the Primary Measurement Period; or

              (3)  Mallinckrodt's appointment under Section 3.01(c) as the
         exclusive distributor and exclusive sales representative for ALBUNEX
         sold in and throughout the Nycomed Territory has become co-exclusive
         pursuant to MBI's exercise of its option under Section 3.02(b) of ARDA
         or pursuant to Section 9.01(a) or (b) of ARDA.

    4.2  AMENDMENT OF SECTION 3.06(a).  Section 3.06(a) of ARDA is amended to
read as follows:

         3.06 DUTIES OF MALLINCKRODT. In addition to its other duties
    hereunder, Mallinckrodt shall:

         (a)  Treat ALBUNEX as an important contrast product in the same manner
    that Mallinckrodt traditionally prepares for the marketing of and markets
    its important contrast line of products for purposes of Mallinckrodt's
    pre-marketing, marketing, sales and distribution efforts and expenditures.
    By way of guidance in the interpretation of Mallinckrodt's responsibilities
    under this section, Mallinckrodt has informed MBI that it considers ALBUNEX
    to have the potential to be a leading product within Mallinckrodt's product
    portfolio in terms of its importance to Mallinckrodt's revenues and net
    income, and that Mallinckrodt will support the pre-market preparation,
    product launch, marketing


                                         -15-


<PAGE>

    support and distribution of ALBUNEX in a manner that will maximize
    Mallinckrodt's return on the product given its potential at the time that
    further investment in the product is considered.  Mallinckrodt's marketing,
    sales and distribution efforts regarding ALBUNEX shall place emphasis on
    all relevant clinical indications of ALBUNEX, market segments and
    appropriate geographical regions in the Territory, the Additional Territory
    and the Nycomed Territory, and the recruitment of medical and scientific
    opinion leaders;

    4.3  AMENDMENT OF SECTION 3.07.  Section 3.07 of ARDA is amended to read as
follows:

         3.07 MARKETING.

         (a)  Promptly after Mallinckrodt's annual marketing and sales plan for
    ALBUNEX is approved internally each year, Mallinckrodt shall provide MBI
    with an appropriately detailed summary of the plan for MBI's internal use.

         (b)  Mallinckrodt shall, from time to time and in its sole discretion,
    establish the prices at which ALBUNEX shall be sold by it or its
    Affiliates.  Terms of all sales, including but not limited to credit,
    billing and shipments, shall be established by Mallinckrodt in its sole
    discretion.

         (c)  If (i) Mallinckrodt or an Affiliate of Mallinckrodt proposes to
    enter into a distribution or other agreement for the sale and distribution
    of ALBUNEX with a third party other than a third party designated by MBI
    purusant to Section 3.02B (a "Distributor"), (ii) the agreement would
    require the Distributor to make upfront payments to Mallinckrodt or its
    Affiliate as a condition of being appointed a distributor and (iii) the
    agreement would require Mallinckrodt or its Affiliate to pay a commission
    (or make other payments) to the Distributor in respect of the Distributor's
    sales of ALBUNEX to end users, then:

              (1)  Mallinckrodt or its Affiliate shall consult with MBI
         regarding the allocation between them of the benefit of the upfront
         payments and the burden of the commissions (or other) payments;

              (2)  MBI shall have 30 days from the date that Mallinckrodt or
         its Affiliate provides MBI with written notice of the relevant details
         in which to give written notice to Mallinckrodt or its Affiliate of
         the portion, if any (but in no event exceeding 40% without the written
         consent of Mallinckrodt or its Affiliate), of the upfront payments
         from the Distributor that MBI elects to have paid over to MBI;

              (3)  if MBI elects to have Mallinckrodt or its Affiliate pay over
         a portion of the upfront payments from the Distributor, Mallinckrodt
         or its Affiliate shall do so within 30 days after receipt of the
         upfront payments, and MBI shall reimburse Mallinckrodt or its
         Affiliate, within 30 days after receipt of written notice of payment,
         for the same percentage of each commission (or other) payment that


                                         -16-


<PAGE>

         Mallinckrodt or its Affiliate pays to the Distributor in accordance
         with the terms of the distribution or other agreement; and

              (4)  if MBI does not elect to have Mallinckrodt or its Affiliate
         pay over any portion of the upfront payments, or if MBI fails to
         respond within 30 days to the written notice from Mallinckrodt or its
         Affiliate of the relevant details, neither Mallinckrodt (or its
         Affiliate) nor MBI shall have any obligation to the other in respect
         of the upfront and commission (or other) payments.

         (d)  If (i) Mallinckrodt or an Affiliate of Mallinckrodt enters into a
    distribution or other agreement for the sale and distribution of ALBUNEX
    with a Distributor, (ii) the agreement requires the Distributor to make
    upfront payments to Mallinckrodt or its Affiliate as a condition of being
    appointed a distributor and (iii) the agreement does not require
    Mallinckrodt or its Affiliate to pay a commission (or make other payments)
    to the Distributor in respect of the Distributor's sales of ALBUNEX to end
    users, then Mallinckrodt or its Affiliate shall pay 40% of the upfront
    payments to MBI within 30 days after receipt of the upfront payments.

         (e)  If Mallinckrodt or an Affiliate of Mallinckrodt enters into a
    distribution or other agreement for the sale and distribution of ALBUNEX
    with a third party designated by MBI pursuant to Section 3.02B (a
    "MBI-Designated Distributor"), then:

              (A)  Mallinckrodt or its Affiliate shall pay 40% of the upfront
         payments, if any, paid by the MBI-Designated Distributor to MBI within
         30 days after receipt of the upfront payments; and

              (B)MBI shall reimburse Mallinckrodt or its Affiliate for 40% of
         each commission (or other payment), if any, paid to the MBI-Designated
         Distributor within 30 days after receipt of written notice of payment
         from Mallinckrodt or its Affiliate.

         (f)  Sections 3.07(c), (d) and (e) shall not apply in respect of any
    territory if and when Mallinckrodt is entitled to manufacture ALBUNEX for
    sale in that territory pursuant to Section 7.01(c).

                                      ARTICLE 5

                                    MISCELLANEOUS

    5.1  INTERPRETATION.  As amended by this Amendment, ARDA remains in full
force and effect.  In the event of inconsistency or conflict between any
provisions of this Amendment and the provisions of ARDA, the provisions of this
Amendment shall control.

    5.2  RESEARCH QUANTITIES.  MBI has received requests from researchers and
clinicians for samples of the Current Product.  MBI may (but shall not be
required to) fill these requests if doing so is legally permissible as long as
the quantities provided are minimal and intended


                                         -17-


<PAGE>

only for non-clinical basic research.  MBI shall keep Mallinckrodt promptly and
fully informed of MBI's activities in this regard.

    5.3  COUNTERPARTS.  This Amendment may be signed in any number of
counterparts, each of which shall be deemed to be an original, but all of which
together shall constitute one and the same instrument.

    In witness, the parties have executed this Amendment.

                                       MALLINCKRODT MEDICAL, INC.


                                       By  /s/ J.C. Carlile
                                          ------------------------------------
                                            Name:  J.C. Carlile
                                                  --------------------------
                                            Title:
                                                  --------------------------



                                       MOLECULAR BIOSYSTEMS, INC.


                                       By  /s/ Bobba Venkatadri
                                          ------------------------------------
                                            Name:     Bobba Venkatadri

                                            Title:    President


                                         -18-


<PAGE>


                                                                   Exhibit 10.11
                       SETTLEMENT AGREEMENT AND MUTUAL RELEASE

         THIS SETTLEMENT AGREEMENT AND MUTUAL RELEASE

("Agreement") is entered into as of the 10th day of September, 1996 by and
between SHIONOGI & CO., LTD., a Japanese corporation, having its principal
offices at 1-8 Doshomachi 3-chome, Chuo-ku, Osaka 541, Japan  ("Shionogi")
and MOLECULAR BIOSYSTEMS, INC., a Delaware corporation, having its principal
offices at 10030 Barnes Canyon Road, San Diego, California, 92121 USA ("MBI")
to resolve any and all pending disputes between them.


                                 W I T N E S S E T H:


         WHEREAS, Shionogi and MBI (jointly referred to as the "Parties") have
entered into a License and Cooperative Development Agreement dated March 2,
1989, as amended September 14, 1993, which provided, INTER ALIA, for MBI's
granting of a license to Shionogi for certain rights to AlbunexR in Japan, The
Republic of China (Taiwan) and The Republic of Korea (South Korea) ("License
Agreement");

         WHEREAS, the Parties have served each other with notices of
termination of the License Agreement;

         WHEREAS, the License Agreement contains an arbitration clause
requiring the Parties to resolve their respective disputes through the American
Arbitration Association;

         WHEREAS, each of the Parties has filed a Demand for Arbitration
(collectively, "Demands for Arbitration") against the other, and such Demands
for Arbitration are currently pending before the American Arbitration
Association in New York, New York, in a proceeding entitled SHIONOGI & CO., LTD.
V. MOLECULAR BIOSYSTEMS, INC., AAA Case No. 13-T-133-00300-96 ("Arbitration");


                                     Page 1 of 22

<PAGE>

                            Settlement Agreement and Mutual Release
                               between Shionogi & Co., Ltd. and
                                  Molecular Biosystems, Inc.

         WHEREAS, the Parties recognize the risks and expense inherent in all
arbitration, litigation or formal dispute resolution;

         WHEREAS, the Parties desire to enter into this Agreement to compromise
and settle the issues of the Arbitration and other related matters without an
admission of liability or fault by either Shionogi or MBI;

         WHEREAS, the Parties desire to resolve and settle all disputes between
the Parties including, but not limited to, the claims raised in the Arbitration,
upon the terms and subject to the conditions hereinafter set forth;


         NOW, THEREFORE, in consideration of the mutual promises and agreements
contained in this Agreement, the Parties do promise and agree as follows:

1.  INCORPORATION OF RECITALS.  The foregoing recitals are hereby incorporated
    into this Agreement as fully and effectually as if they were set forth at
    length in this paragraph.

2.  DEFINITIONS.  The terms used in this Agreement have the meanings given them
    in the License Agreement, except as follows:

         a.   "Agreement" means this Settlement Agreement and Mutual Release.


         b.   "AlbunexR Demand" means any request from a customer or potential
              customer for AlbunexR, or for an ultrasound contrast imaging
              agent, within the indications approved for AlbunexR by the MHW.

         c.   "AlbunexR-related Business" means the business activities
              involved in Shionogi's role with regard to AlbunexR.

         d.   "Clinical Data" means any data maintained, gathered, compiled, or


                                     Page 2 of 22

<PAGE>

                            Settlement Agreement and Mutual Release
                               between Shionogi & Co., Ltd. and
                                  Molecular Biosystems, Inc.

              generated by Shionogi or anyone acting on Shionogi's behalf and
              submitted to the MHW for the purpose of obtaining NDA Approval.

         e.   "FS069" means MBI's second generation ultrasound contrast imaging
              agent consisting of perfluoropropane-filled microspheres in human
              serum albumin.

         f.   "Import License" means approval obtained from the MHW to import
              AlbunexR into Japan.

         g.   "MHW" means the Ministry of Health and Welfare of Japan.

         h.   "NDA" means a new drug application submitted to the MHW by
              Shionogi pertaining to AlbunexR.

         i.   "NDA Approval" means the AlbunexR NDA approval granted to
              Shionogi by the MHW to import and manufacture AlbunexR.

         j.   "New Licensee" means a person or entity to whom or which MBI
              grants some or all of MBI's rights to market and sell AlbunexR in
              Japan.

3.  DATE AND TIME REFERENCE.  All acts, obligations or events required to be
    performed or to take place under this Agreement by a given date shall be
    performed according to the date and time zone of Japan.

4.  MONETARY SETTLEMENT.  MBI shall pay Shionogi a total of eight million, five
    hundred thousand U.S. dollars ($8,500,000.00), payable via wire transfer of
    immediately available federal funds to an account specified by Shionogi, as
    follows:

         a.   Three million U.S. dollars ($3,000,000.00) before the close of
              the third business day following the complete execution of this
              Agreement by the


                                     Page 3 of 22

<PAGE>

                            Settlement Agreement and Mutual Release
                               between Shionogi & Co., Ltd. and
                                  Molecular Biosystems, Inc.

              Parties and their counsel.

         b.   Two million U.S. dollars ($2,000,000.00) on or before September
              10, 1997;

         c.   Two million U.S. dollars ($2,000,000.00) on or before September
              10, 1998; and

         d.   One million five-hundred thousand U.S. dollars ($1,500,000.00) on
              or before September 10, 1999.

5.  CONSENT TO JURISDICTION AND STIPULATED JUDGMENT IN THE EVENT OF
    NON-PAYMENT.
              a.Concurrently with the execution of the Agreement, MBI shall
              execute a Confession of Judgment and Statement Authorizing Entry
              of Judgment and shall obtain from qualified counsel an Attorney's
              Certificate of Examination (collectively, "Stipulated Judgment"),
              all in the forms attached hereto as Exhibits A-1, A-2 and A-3,
              which could be filed in Los Angeles County Superior Court for
              entry and enforcement in the event of non-payment of any of the
              payments provided for in Paragraph 4, above.

    b.   In the event of non-payment, prior to the filing and enforcement
         of the Stipulated Judgment, Shionogi shall tender notice of
         non-payment in accordance with Paragraph 17, below, and shall
         provide MBI a three (3) business day period within which to
         tender payment to Shionogi of those sums then due under Paragraph
         4, above.  If Shionogi does not receive such payment within such
         three (3) business day period, then all sums due under Paragraph
         4, above, shall be accelerated and payable immediately without
         further regard to the dates otherwise set forth in said


                                     Page 4 of 22
<PAGE>

                            Settlement Agreement and Mutual Release
                               between Shionogi & Co., Ltd. and
                                  Molecular Biosystems, Inc.

          paragraph, and Shionogi may proceed to file and to otherwise
          enforce the Stipulated Judgment without further notice to MBI.

     c.   MBI shall not contest the jurisdiction of the Los Angeles County
          Superior Court for purposes of permitting the filing and
          enforcement of the Stipulated Judgment.  For jurisdictional
          purposes, performance of the Agreement shall be deemed to be in
          Los Angeles County and within the territorial limits of the
          Central District of the Los Angeles County Superior Court.

     d.   The Stipulated Judgment shall be kept confidential by Shionogi
          and shall not be filed, published or released to anyone until
          such time MBI has failed to make a payment called for in
          Paragraph 4, above, or other than as reasonably necessary to
          Shionogi's employees, accountants, attorneys, or other
          professional representatives, or other than as Shionogi may be
          legally required to disclose the Stipulated Judgment by
          appropriate governmental authorities, and only then by reason of
          a court order, subpoena or request bearing the force of law.  The
          provisions of this paragraph shall survive only for a period of
          five (5) years from the date the Parties have entered into this
          Agreement.

6.  DOCUMENT ACCESSIBILITY AND STORAGE.

              a.   Within five (5) business days from Shionogi's receipt of a
                   written request from MBI, Shionogi shall make available to
                   MBI during regular business hours at Shionogi's corporate
                   office in Osaka, Japan, Clinical Data and other documentary
                   information, exclusive of any document subject to the
                   attorney-client privilege and/or attorney-work product
                   privilege


                                     Page 5 of 22

<PAGE>

                            Settlement Agreement and Mutual Release
                               between Shionogi & Co., Ltd. and
                                  Molecular Biosystems, Inc.

                   ("Privileged Document"), pertaining to AlbunexR and in
                   Shionogi's possession, custody or control.  Notwithstanding
                   the foregoing, any Privileged Document shall be made
                   available to MBI only if the Privileged Document constitutes
                   safety- or efficacy-related data pertaining to AlbunexR and
                   such data is not otherwise made available by Shionogi to
                   MBI.  In the event Shionogi waives the attorney-client
                   privilege by reason of it producing a Privileged Document to
                   a third party, Shionogi shall immediately notify MBI and
                   make such document available to MBI in the manner stated
                   above.

              b.   Within fourteen (14) calendar days from the date that the
                   Parties enter into this Agreement, Shionogi shall provide to
                   MBI a copy of the NDA and all correspondence exchanged
                   between Shionogi, on the one hand, and the MHW, on the other
                   hand, to obtain NDA Approval.

              c.   Shionogi shall remain the custodian of all Clinical Data and
                   other documentary information pertaining to AlbunexR, which
                   is in Shionogi's possession, custody or control.  In the
                   event that Shionogi should desire to discard all or any
                   portion of such Clinical Data or other documentary
                   information pertaining to AlbunexR, Shionogi shall tender
                   notice of the same to MBI in accordance with Paragraph 17,
                   below, and shall afford MBI twenty (20) calendar days within
                   which to notify Shionogi whether MBI will elect to take
                   possession of such documents which Shionogi desires to
                   discard ("Election").  If MBI makes such Election, Shionogi
                   shall


                                     Page 6 of 22

<PAGE>

                            Settlement Agreement and Mutual Release
                               between Shionogi & Co., Ltd. and
                                  Molecular Biosystems, Inc.

                   make such documents available to MBI, F.O.B. at Shionogi's
                   corporate offices in Osaka, Japan.  If MBI fails to make a
                   timely Election, or to take possession of such documents
                   within thirty (30) calendar days from the date of MBI's
                   timely Election, Shionogi may discard such documents without
                   further notification to MBI.

              d.   The provisions of this paragraph shall survive only for a
                   period of five (5) years from the date the Parties have
                   entered into this Agreement.


                                     Page 7 of 22

<PAGE>

                            Settlement Agreement and Mutual Release
                               between Shionogi & Co., Ltd. and
                                  Molecular Biosystems, Inc.

7.  DATA, APPROVALS, LICENSES.

              a.   MBI shall work diligently to procure a New Licensee and have
                   that New Licensee apply to the MHW for a new Import License
                   as soon as practicable.  Shionogi shall make available to
                   the New Licensee during regular business hours at Shionogi's
                   corporate offices in Osaka, Japan, all Clinical Data in
                   Shionogi's possession, custody or control, within five (5)
                   business days from Shionogi's receipt of a written request
                   from the New Licensee.  In addition, Shionogi shall
                   cooperate in transferring the NDA Approval to a New Licensee
                   until the NDA Approval transfer is effected, provided that
                   the New Licensee has submitted to the MHW a notice of
                   transfer of NDA Approval and has applied for a new Import
                   License by September 30, 1996.  If the New Licensee has
                   applied to the MHW for transfer of NDA Approval and a new
                   Import License within the specified period, Shionogi shall
                   cooperate to preserve its NDA Approval and its Import
                   License until the transfer of the NDA Approval can legally
                   be effected or until December 31, 1996, whichever occurs
                   first.

              b.   If, despite reasonable efforts by MBI to procure a New
                   Licensee, MBI is unable to do so by September 30, 1996,
                   Shionogi shall agree to a one-time extension to and
                   including November 15, 1996, for the New Licensee to apply
                   for a transfer of NDA Approval and to apply for a new Import
                   License ("Extension").  If the Extension is exercised,
                   Shionogi shall cooperate to preserve its NDA Approval and
                   its Import License until the


                                     Page 8 of 22

<PAGE>

                            Settlement Agreement and Mutual Release
                               between Shionogi & Co., Ltd. and
                                  Molecular Biosystems, Inc.

                   transfer can be legally effected and shall continue to
                   cooperate with any subsequent transfer of the NDA Approval
                   until February 14, 1997.  In no event shall Shionogi's
                   obligations to cooperate extend beyond February 14, 1997.

              c.   With respect to AlbunexR, Shionogi makes no representation
                   regarding any actions by the MHW or any other governmental
                   agencies, including whether the MHW shall allow the transfer
                   of its NDA Approval, or the application for a new Import
                   License to the New Licensee.

8.  FS069 ASSIGNMENT.  Shionogi hereby assigns to MBI any and all of its rights
    to FS069 under the License Agreement.  Shionogi makes no representation
    regarding any actions by the MHW, or any other governmental agency, which
    may be taken with respect to FS069.

9.  ALBUNEXR SALES SUPPORT.  Shionogi shall continue to meet AlbunexR Demand
    within Japan until MBI has secured a New Licensee for Japan, provided,
    however, that if a New Licensee has not applied to the MHW for transfer of
    the NDA Approval or has not filed an application for a new Import License
    within the period (including the Extension period) provided in Paragraph 7,
    above, Shionogi shall be under no further duty to supply AlbunexR to users
    in Japan or otherwise meet AlbunexR Demand.  Under no circumstance is
    Shionogi at any time required to engage in any further promotion or
    advertising of AlbunexR.  Under no circumstance shall Shionogi's agreement
    in Paragraph 7, above, to cooperate to preserve its NDA Approval and its
    Import License, obligate Shionogi in any way to meet AlbunexR Demand after
    December 31, 1996.


                                     Page 9 of 22

<PAGE>

                            Settlement Agreement and Mutual Release
                               between Shionogi & Co., Ltd. and
                                  Molecular Biosystems, Inc.

10. TERMINATION OF LICENSE AGREEMENT.

              a.   The Parties hereby acknowledge the termination of the
                   License Agreement and all licenses granted to Shionogi
                   thereunder, and the return to MBI of all rights and licenses
                   thereunder, except for a short-term, revocable,
                   non-exclusive grant of rights to Shionogi for the sole
                   purpose of permitting Shionogi to undertake its duties under
                   Paragraphs 6, 7 and 9, above.  The limited rights maintained
                   by Shionogi under this paragraph shall terminate upon the
                   MHW's transfer of Shionogi's NDA Approval and the granting
                   of a new Import License to a New Licensee, or February 14,
                   1997, whichever occurs first.


              b.   Shionogi shall continue to make reports on AlbunexR
                   quarterly sales required under the License Agreement and on
                   any adverse event on which Shionogi is notified by any
                   doctor.

11. DISMISSAL.  Concurrently with the execution of this Agreement, Shionogi and
    MBI shall dismiss all Demands for Arbitration with prejudice and shall
    execute and file a Stipulation to Dismiss Arbitration with Prejudice, in
    the form attached hereto as Exhibit "B", with the American Arbitration
    Association, which stipulation will, when filed, be sufficient to effect
    such a dismissal of the Arbitration with prejudice as to the Parties, and
    each of them.  The Parties shall do all other things reasonably necessary,
    including signing any additional documents, in order to accomplish such
    dismissal.

12. MUTUAL RELEASES.

              a.   Subject to the obligations imposed upon the Parties by this
                   Agreement,


                                    Page 10 of 22

<PAGE>

                            Settlement Agreement and Mutual Release
                               between Shionogi & Co., Ltd. and
                                  Molecular Biosystems, Inc.

                   Shionogi and MBI hereby release and absolutely and forever
                   discharge each other, and all of their respective past and
                   present parent companies, affiliated companies, directors,
                   officers, shareholders, employees, agents, representatives,
                   attorneys, successors and assigns, of and from any and all
                   claims, demands, damages, debts, liability, accounts,
                   reckonings, obligations, costs, expenses, liens, actions and
                   causes of action, whether known or unknown, suspected or
                   unsuspected (all of which sometimes are referred to
                   collectively as the "Released Claims") which they now have,
                   own or hold or at any time heretofore ever had, owned or
                   held or could, should or may hereafter have, own or hold
                   including, but not limited to, those arising out of or
                   related to the allegations in the Parties' respective
                   Demands for Arbitration or alleged conduct and business
                   practices referred to in the Demands for Arbitration and in
                   the Arbitration itself.

              b.   The Parties respectively acknowledge that they are familiar
                   with Section 1542 of the California Civil Code, which
                   provides as follows:

                        "A GENERAL RELEASE DOES NOT EXTEND TO CLAIMS WHICH THE
                        CREDITOR DOES NOT KNOW OR SUSPECT TO EXIST IN HIS FAVOR
                        AT THE TIME OF EXECUTING THE RELEASE, WHICH IF KNOWN BY
                        HIM MUST HAVE MATERIALLY AFFECTED HIS SETTLEMENT WITH
                        THE DEBTOR."

                   The Parties waive and relinquish any rights and benefits
                   which they have or


                                    Page 11 of 22

<PAGE>

                            Settlement Agreement and Mutual Release
                               between Shionogi & Co., Ltd. and
                                  Molecular Biosystems, Inc.

                   may have under Section 1542 of the California Civil Code to
                   the full extent they may lawfully waive all such rights and
                   benefits pertaining to the subject matter of this Agreement.
                   The parties hereto acknowledge that they are aware that they
                   may hereafter discover facts in addition to or different
                   from those which they now know or believe to be true with
                   respect to the subject matter of this Agreement, but that it
                   is their intention hereby to fully, finally, and forever
                   settle and release any and all Released Claims, known and
                   unknown, suspected and unsuspected, which do now exist, may
                   exist, or heretofore have existed between them, and further
                   acknowledge that in furtherance of such intention, the
                   releases given in this Agreement shall be and remain in
                   effect as full and complete releases notwithstanding the
                   discovery or existence of any such additional or different
                   facts.

              c.   Shionogi hereby acknowledges that the payments under 
                   Paragraph 4, above, will, when received in their entirety 
                   by Shionogi, constitute full and complete satisfaction and 
                   discharge of any and all Released Claims referenced in 
                   Paragraph 12(a), above.

              d.   The Parties acknowledge and agree that the sole
                   consideration for executing this Agreement and 
                   for releasing the Released Claims is the payment by 
                   MBI and receipt by Shionogi of the sums due under
                   Paragraph 4, above, and the exchange of releases set forth
                   in this paragraph.

13. INDEMNIFICATION.  The releases and dismissal with prejudice set forth
    hereinabove shall


                                    Page 12 of 22

<PAGE>

                            Settlement Agreement and Mutual Release
                               between Shionogi & Co., Ltd. and
                                  Molecular Biosystems, Inc.

    not extend to the indemnification provisions contained in Article XI,
    Section 11.5, subdivisions (c) and (d), of the License Agreement relating
    to patent infringement and products liability claims, respectively, or to
    any representation or warranty made in this Agreement.  In the event
    Shionogi transfers its Clinical Data and/or NDA Approval to a New Licensee
    designated by MBI, MBI agrees to indemnify Shionogi from liability based on
    any and all claims asserted by the New Licensee against Shionogi, except to
    the extent that such liability arises out of activities undertaken by
    Shionogi after the date of transfer of the NDA Approval to the New Licensee
    or after February 14, 1997, whichever occurs first.

14. CONFIDENTIALITY.  The Parties agree to keep the terms of this Agreement
    confidential, other than as reasonably necessary to the Parties' respective
    employees, accountants, attorneys, or other professional representatives,
    or as each of the Parties may be legally required to disclose such terms by
    appropriate governmental authorities, and only then by reason of the
    issuance of a court order, subpoena, or request having the force of law.
    Provided, however, each party shall be allowed to announce or disseminate
    that this Agreement allows MBI to re-acquire the exclusive licensing and
    other rights to manufacture and market Albunex-Registered Trademark-
    in the Far East for $8,500,000.00 to be paid in installments.  The 
    provisions of this paragraph shall survive only for a period of five (5)
    years from the date the Parties have entered into this Agreement.

15. REPRESENTATIONS AND WARRANTIES OF SHIONOGI.  Shionogi represents and  
    warrants to MBI:

              a.   that at all times subsequent to the execution of the License
                   Agreement and prior to the execution of this Agreement,
                   Shionogi has, to the best of its


                                    Page 13 of 22


<PAGE>

                            Settlement Agreement and Mutual Release
                               between Shionogi & Co., Ltd. and
                                  Molecular Biosystems, Inc.

                   knowledge, filled all material orders it received for
                   Albunex-Registered Trademark- and provided information
                   about Albunex-Registered trademark- in response to any 
                   material inquiries about ultrasound contrast imaging agents.

              b.   that it maintains an NDA Approval for the sale of 
                   Albunex-Registered Trademark- within Japan and has a license
                   from the MHW to import Albunex-Registered Trademark-
                   to Japan both of which are current and in full force as of 
                   the date of the Agreement.

              c.   that it does not now or never has had any reason to believe
                   that any written report made to MBI by Shionogi under the
                   License Agreement contains false information.

              d.   that at all times subsequent to the execution of the License
                   Agreement and prior to the execution of this Agreement,
                   Shionogi has conducted all Albunex-Registered Trademark-
                   -related business in Japan in a manner that has not violated
                   any applicable law, rule or regulation of any Japanese 
                   governmental authority;

              e.   that Shionogi is a business entity validly organized under
                   the laws of Japan;

              f.   that Shionogi and the individual executing the Agreement on
                   Shionogi's behalf are empowered and authorized to make,
                   execute, deliver and perform this Agreement and the actions
                   contemplated by it;

              g.   that Shionogi's execution and delivery of this Agreement and
                   its performance hereunder have been duly authorized by all
                   necessary action; and

              h.   that this Agreement, when executed, shall constitute the
                   legal, valid and binding obligation of Shionogi, enforceable
                   against it in accordance with its


                                    Page 14 of 22

<PAGE>

                            Settlement Agreement and Mutual Release
                               between Shionogi & Co., Ltd. and
                                  Molecular Biosystems, Inc.

                   terms.

16. REPRESENTATIONS AND WARRANTIES OF MBI.  MBI represents and warrants to
    Shionogi:

              a.   that MBI is a business entity validly organized under the
                   laws of Delaware;

              b.   that MBI and the individual executing the Agreement on 
                   MBI's behalf are empowered and authorized to make, execute,
                   deliver and perform this Agreement and the actions 
                   contemplated by it;

              c.   that MBI's execution and delivery of this Agreement,
                   including execution and delivery of the 
                   Stipulated Judgment, and MBI's performance hereunder
                   have been duly authorized by all necessary action; and

              d.   that this Agreement, when executed, shall constitute the
                   legal, valid and binding obligation of MBI, enforceable
                   against MBI in accordance with its terms.

17. NOTICES.  All notices, requests, demands, processes and other communications
    hereunder shall be in writing and shall be deemed to have been duly given
    if: (1) personally delivered, when receipt is acknowledged; or delivered by
    an internationally-recognized overnight courier service, when received; or
    facsimile transmission, upon completion of transmission, if transmission is
    during the recipient's normal business hours and receipt of transmission is
    confirmed by the recipient; and (2) addressed as follows:


                                    Page 15 of 22

<PAGE>

                            Settlement Agreement and Mutual Release
                               between Shionogi & Co., Ltd. and
                                  Molecular Biosystems, Inc.


              TO SHIONOGI:

              Shionogi & Co., Ltd.
              1-8, Doshomachi 3-chome, Chuo-ku
              Osaka 541, JAPAN
                        Telephone:  06-202-2161
                        Facsimile:  06-229-0987

              Attention:     Mr. Yoshihiko Shiono
                             President

              WITH A COPY TO:

              Julia Tachikawa, Esq.
              1299 Ocean Avenue, Fifth Floor
              Santa Monica, California 90401
                        Telephone:  (310) 319-3250
                        Facsimile:  (310) 458-6290


              TO MBI:

              Molecular Biosystems, Inc.
              10030 Barnes Canyon Road
              San Diego, California 92121-2789
                        Telephone:  (619) 452-0681
                        Facsimile:  (619) 452-6187

              Attention:     Kenneth J. Widder, M.D.
                             Chairman and Chief Executive Officer


                                    Page 16 of 22

<PAGE>

                            Settlement Agreement and Mutual Release
                               between Shionogi & Co., Ltd. and
                                  Molecular Biosystems, Inc.

              WITH A COPY TO:

              Craig P. Colmar, Esq.
              Johnson and Colmar
              300 South Wacker Drive, Suite 1000
              Chicago, Illinois  60606
                        Telephone:  (312) 922-1980
                        Facsimile:  (312) 922-9283

18. SURVIVAL OF REPRESENTATIONS AND WARRANTIES.  The Representations and  
    Warranties made in Paragraphs 15 and 16, above, shall survive only for a
    period of five (5) years from the date the Parties have entered into this
    Agreement.

19. COSTS AND EXPENSES.  The Parties shall bear their own respective costs and
    expenses associated with their respective claims under the License
    Agreement including, but not limited to, their respective attorneys' fees
    and Arbitration fees incurred in connection with this Agreement, the
    Demands for Arbitration, or any other matter relating or leading up to the
    Arbitration.

20. CHOICE OF LAW, VENUE AND SUBMISSION TO JURISDICTION.  This Agreement, its
    interpretation and enforcement shall be governed by the laws of the state
    of California without regard for California's choice of law provisions.
    Venue for any action arising out of this Agreement shall be in the Central
    District of the Los Angeles County Superior Court.  Shionogi and MBI shall
    submit to the personal jurisdiction of the Los Angeles County Superior
    Court for any such action.

21. CLAIMS NOT ASSIGNED.  Each of the Parties represents and warrants that it
    is the sole and lawful owner of all claims it is releasing under Paragraph
    12, above, and that it has not heretofore assigned or transferred, or
    offered to transfer, any such claims to any person,


                                    Page 17 of 22

<PAGE>

                            Settlement Agreement and Mutual Release
                               between Shionogi & Co., Ltd. and
                                  Molecular Biosystems, Inc.

    corporation or entity.

22. NO ADMISSION OF LIABILITY.  This Agreement reflects a compromise of
    disputed claims.  It does not constitute and is not to be construed as an
    admission of liability by either of the Parties.

23. SUCCESSORS, ETC.  The terms of this Agreement shall be binding upon and
    shall inure to the benefit of each of the Parties and their respective
    partners, agents, representatives, attorneys, insurers, employees,
    licensees, predecessors, successors, heirs, assigns, directors, officers,
    shareholders, executors, administrators, and/or any other person or persons
    who may in any fashion claim an interest in the subject matter hereof
    through either of the Parties.

24. INDEPENDENT COUNSEL.  Shionogi and MBI each hereby warrants and represents
    to the other that it has consulted with and has been represented by
    independent counsel in making the settlement, release, and other matters
    provided for in this Agreement, and with respect to the advisability of
    executing this Agreement.  Each of the Parties, together with its
    attorneys, has made such investigation of the facts pertaining to this
    Agreement and to the settlement and releases provided for in this Agreement
    as it has deemed necessary, and, in entering into this Agreement, each of
    the Parties has relied upon its investigations and the investigations of
    its attorneys and representatives and has not relied upon any
    representations by any representative of the other party, except as to
    those representations set forth in Paragraphs 15 and 16, above.

25. ATTORNEYS' FEES.  In the event of any action, suit or other proceeding
    brought by one of the Parties concerning the negotiation, interpretation,
    validity, performance or breach of


                                    Page 18 of 22

<PAGE>

                            Settlement Agreement and Mutual Release
                               between Shionogi & Co., Ltd. and
                                  Molecular Biosystems, Inc.

    this Agreement, the prevailing party shall recover all of such party's
    actual attorneys' fees, expenses and costs, not limited to costs of suit,
    incurred in each and every such action, suit or other proceeding, including
    any and all appeals or petitions relating thereto, and the collection of
    such fees, expenses and costs.

26. AMENDMENTS.  This Agreement will not be amended, modified or supplemented
    nor any term or condition hereof waived except in a writing signed by the
    authorized representatives of each of the Parties.

27. CAPTIONS.  The captions of sections of this Agreement are for convenience
    and reference only and are not to be considered in construing this
    Agreement.

28. CONSTRUCTION OF AGREEMENT.  All Parties to this Agreement acknowledge that
    they and their counsel have reviewed and revised this Agreement and that
    the normal rules of construction to the effect that any ambiguities are to
    be resolved against the drafting party shall not be employed in the
    interpretation of this Agreement or any amendments hereto.  This Agreement
    shall not be construed either for or against any party hereto but shall be
    given a reasonable interpretation in accordance with the plain meaning of
    its terms and the intent of the Parties as reflected in this Agreement.

29. ENTIRE AGREEMENT.  The Parties agree that this Agreement shall be final and
    binding upon the Parties, their successors and assigns, and any changes in
    this Agreement, whether by additions, deletions, waivers, amendments or
    modifications, may be made only in writing and signed by both of the
    Parties.  This Agreement and the Exhibits annexed hereto constitute a
    single, integrated written contract expressing the entire agreement of the
    Parties concerning the subject matter hereof.  No covenants, agreements,
    representations


                                    Page 19 of 22

<PAGE>

                            Settlement Agreement and Mutual Release
                               between Shionogi & Co., Ltd. and
                                  Molecular Biosystems, Inc.

    or warranties of any kind whatsoever have been made by either party hereto,
    except as specifically set forth in this Agreement.  All prior discussions
    and negotiations with respect to the subject matter hereof have been and
    are merged and integrated into, and are superseded by, this Agreement.

30. SEVERABILITY.  If any provision of this Agreement is held unenforceable or
    in conflict with the laws of any jurisdiction, the provision shall be
    regarded as severable from this Agreement and the remaining provisions
    shall remain in full force.

31. COOPERATION.  The Parties shall cooperate with one another in signing such
    documents and instruments as may be necessary or desirable in performing
    this Agreement.

32. COUNTERPARTS.  This Agreement may be executed in one or more counterparts,
    all of which taken together shall constitute one and the same instrument.
    Facsimile signatures shall be deemed original until original signatures are
    supplied.


                                    Page 20 of 22

<PAGE>

                            Settlement Agreement and Mutual Release
                               between Shionogi & Co., Ltd. and
                                  Molecular Biosystems, Inc.

         IN WITNESS WHEREOF, the Parties have caused this Agreement to be
executed and delivered in their respective names by their authorized
representatives as of the date and year first above written.


                             MOLECULAR BIOSYSTEMS, INC.



                             By: /s/ Kenneth J. Widder
                                -----------------------------------
                                       Its Authorized Officer
                                           Kenneth J. Widder, M.D.
                                    Chairman and Chief Executive Officer

                             SHIONOGI & CO., LTD.



                             By: /s/ Yoshihiko Shiono
                                -----------------------------------
                                       Its Authorized Officer
                                             Yoshihiko Shiono
                                              President

APPROVED AS TO FORM:

LeBOEUF, LAMB, GREENE & MACRAE
725 S. Figueroa Street
Los Angeles, California  90017-5436

By: /s/ Dean Hansell
   --------------------------
         Dean Hansell


ROGERS & WELLS
444 South Flower Street
Los Angeles, California 90071-2901

By: /s/ Terry O. Kelly
   --------------------------
         Terry O. Kelly


                                    Page 21 of 22





<PAGE>


                                                                  Exhibit 10.34
                                           
                                 FIRST AMENDMENT
                             TO EMPLOYMENT AGREEMENT
                                           
    This Amendment to Employment Agreement ("this Amendment") dated as of 
April 30, 1996, is between MOLECULAR BIOSYSTEMS, INC., a Delaware Corporation 
(the "Corporation") and BOBBA VENKATADRI ("Employee").

                                     RECITALS

    A.   The Corporation  and the Employee are parties to an Employment
Agreement effective November 1, 1995 ("the Agreement").

    B.   Paragraph 7 (a) provides in part: "This Agreement may not be
changed... but only by way of an instrument in writing signed by the parties
referring to this Agreement."

    C.   The Corporation and the Employee wish to amend the Agreement with
respect to the Employee's home in Pennsylvania

    THEREFORE, in consideration of the mutual promises contained herein and in
the Agreement, the Corporation and the Employee agree as follows:

    1.   Paragraph 5(f)(i) shall be stricken in its entirety and replaced by
the following:

         f.  REAL ESTATE

              (i) The Employee shall be responsible for sale of Employee's home
         located at 300 Barn Hill Road, Westchester, Pennsylvania 19382.  If
         the Employee's home is sold on or before April 30, 1998, the
         Corporation shall be responsible for paying the non-recurring costs
         which are incurred by Employee in the sale of the home.  These costs
         shall include costs which are normally borne by the seller of a home,
         such as real estate agent fees, escrow fees and closing costs.  The
         Employee shall be responsible for these costs if the home is sold
         after the above date.  The Corporation shall also be responsible for
         paying all reasonable expenses for storage, movement and insurance of
         household goods incurred in connection with the sale of Employee's
         home whether or not the home is sold before April 30, 1998.  For the
         purposes of this paragraph, the home will be considered "sold" when
         the sales contract is signed and the escrow period closes.  

<PAGE>

         The Corporation shall not be required to pay for the services of a 
         professional property management company to maintain, market, or 
         sell the Employee's home.
         
AGREED:

                             MOLECULAR BIOSYSTEMS, INC.



                             /s/ Steven Lawson
                             --------------------------------------------------
                             Steven Lawson
                             Vice President, Legal Affairs and 
                                 General Counsel






                             /s/ Bobba Venkatadri
                             --------------------------------------------------
                             Bobba Venkatadri
    

                                          

<PAGE>


                                                                Exhibit 10.36

                                    MBI-VENKATADRI

                                PARTNERSHIP AGREEMENT


    THIS AGREEMENT is made as of October 18, 1996, by (i) Molecular Biosystems,
Inc., a Delaware corporation ("MBI"), and (ii) Bobba Venkatadri ("Mr.
Venkatadri") and Annapurna  Bobba  ("Mrs. Venkatadri") (together, the
"Venkatadris") (also referred to individually as "Partner", or collectively as
the "Partners").

                                      RECITALS:

    A.   The Partners wish to purchase real estate to be used as a principal
residence by the Venkatadris located at 13397 Wyngate Point, San Diego,
California 92130 (the "Property").

    B.   The Partners will own the Property as tenants in common.

    C.   The Partners desire to set out the terms of their partnership as
follows.

    NOW, THEREFORE, in consideration of their mutual promises, the Partners
agree as follows:

    1.   PURCHASE OF THE PROPERTY.  The Venkatadris will have sole
responsibility for selecting the Property and for negotiating, financing (other
than as provided by MBI herein) and consummating the purchase of the Property.

    2.  CAPITAL CONTRIBUTIONS.  MBI will contribute $300,000 ("MBI's Initial
Capital Contribution") towards the purchase of the Property.  Such contribution
will be made at the time of the closing of the purchase of the Property.  The
Venkatadris will contribute the difference between MBI's Initial Capital
Contribution and the purchase price of the Property (such purchase price to be
known as the "Original Purchase Price").  

    3.   PERCENTAGE OWNERSHIP INTERESTS.  Each Partner will own an undivided
interest in the Property as tenants in common (although as between them, the
Venkatadris' interest may be held in joint tenancy), with their percentage
ownership interests in the Property (the "Interests") calculated as follows: 

    (a) MBI's Interest shall be derived by dividing MBI's Initial Capital
    Contribution by the Original Purchase Price, with the result expressed as a
    percentage; and 

    (b) The Venkatadris' Interest shall be equal to the sum of 100% minus MBI's
    Interest.  

Each Partner's Interest will remain constant, unless recalculated as provided in
Section 6 below or as otherwise agreed upon by the Partners.


<PAGE>

    4.   TITLE AND OTHER DOCUMENTATION.  The Venkatadris will ensure that title
to the Property is held in the names of MBI and the Venkatadri as tenants in
common and that any and all real estate, tax, financing or other records reflect
their ownership as tenants in common.  The Venkatadris agree to execute and
cooperate in the recording of any and all documents necessary to evidence the
rights and obligations of the Partners contained in this Agreement.

    5.   OBLIGATIONS WITH RESPECT TO THE PROPERTY.  The Venkatadris shall
maintain the Property and keep it in good condition and repair and shall be
responsible for all expenses in connection with maintenance, financing and
ownership of the Property, including, but not limited to, mortgage payments,
upkeep, taxes and other assessments, insurance, homeowner association fees, if
any, repairs and improvements (the latter of which shall be at the Venkatadris'
option) and utilities.  The Venkatadris shall maintain liability insurance in
amounts approved by MBI and all-risk property insurance coverage on the
Property, including, without limitation, fire, extended coverage, and vandalism
and malicious mischief in an amount which is not less than 100% of the
replacement cost of the Property.  The Venkatadris shall also maintain flood
insurance if the Property is located in an area designated by the Federal
Emergency Management Agency or any other applicable governmental or
quasi-governmental authority having jurisdiction over the Property as a special
flood hazard area.  The Venkatadris shall ensure that MBI is named as an
additional insured under all of the insurance policies entered into pursuant to
this Section. 

    6.  FAILURE TO PERFORM OBLIGATIONS.  In the event that the Venkatadris fail
or refuse for any reason to perform his obligations under Section 5 above, MBI
may perform such obligations upon written notice to Mr. Venkatadri.  MBI may, at
its option, recoup the cost of its performance (the "Performance Cost") as
follows: 

    (a) deduct the Performance Cost from any payments (including compensation)
    due to Mr. Venkatadri by MBI; or 

    (b) recalculate the Interests as follows: 

         (i) MBI's recalculated Interest shall be derived by dividing (A) two
         times the sum of the Performance Cost PLUS MBI's Initial Capital
         Contribution by (B) the Original Purchase Price, with the result
         expressed as a percentage; and 

         (ii) The Venkatadris' recalculated Interest shall be equal to the sum
         of 100% minus MBI's recalculated Interest.

         In the event of such recalculation of the Interests, the Performance
         Cost may also be referred to herein as "MBI's Additional Capital
         Contribution."  


                                          2


<PAGE>

    7.  PURCHASE OF MBI'S INTEREST IN EVENT OF MR. VENKATADRI'S TERMINATION.

    (a) AGREED VALUATION.  In the event of the termination of Mr. Venkatadri's
    employment for any reason, the Partners shall agree on a valuation of the
    Property within 30 days of such termination.  If the Partners fail to reach
    agreement on valuation within such 30-day period, each Partner shall select
    a certified appraiser to perform an appraisal of the Property at each
    selecting Partner's expense.  The average of the two appraisals shall be
    known as the Agreed Valuation.  

    (b) PAYMENT AND CALCULATION OF PURCHASE PRICE.  Within (i) 3 years of the
    date of termination in the event of an Involuntary Termination, (ii) 2
    years of the date of termination in the event of a termination for any
    reason other than Involuntary Termination or Voluntary Termination, or
    (iii) 1 year from the date of termination in the event of a Voluntary
    Termination, Mr. Venkatadri (or his estate) shall purchase MBI's Interest
    for a purchase price equal to the following: 

         the sum of (A) the product of (x) MBI's Interest (as it may be
         recalculated in accordance with Section 6) MULTIPLIED BY (y) the
         Agreed Valuation, PLUS (B) interest at the prime rate   as published
         in the Wall Street Journal, accrued from the date of Mr. Venkatadri's
         termination to the date of purchase (the "Termination Purchase
         Price"), but in no event less than the sum of (C) MBI's Initial
         Capital Contribution plus (D) MBI's Additional Capital Contribution.

    (c) PURCHASE BY THIRD PARTY.  In the event that Mr. Venkatadri is unable or
    unwilling to purchase MBI's Interest, the Venkatadris may sell the Property
    to a third party, and Mr. Venkatadri shall be deemed to have complied with
    his purchase obligation under this Section if a third party purchaser pays
    MBI the Termination Purchase Price.  MBI shall cooperate with the
    Venkatadris in effectuating a sale to a third party under the circumstances
    described herein. 

    (d) DEFINITIONS.  The following terms used in this Section shall have the
    meanings assigned to them below:

         (i) "Involuntary Termination" shall be deemed to have occurred if Mr.
         Venkatadri's employment is terminated by MBI because he dies or cannot
         perform his normal duties on a full-time basis by reason of any
         physical or mental impairment for a period of 6 consecutive months or
         8 months out of any 12-month period.

         (ii) "Voluntary Termination" shall be deemed to have occurred if Mr.
         Venkatadri's employment is terminated by Mr. Venkatadri, other than in
         the event of a Constructive Termination.

         (iii) "Constructive Termination" shall be deemed to have occurred if
         Mr. Venkatadri's employment is terminated by Mr. Venkatadri within 3
         months


                                          3


<PAGE>

         following (A) any reduction in his annual base salary (I.E., exclusive
         of bonuses or other compensation) or (B) a relocation of his place of
         employment more than 35 miles from San Diego if the costs of such
         relocation are not paid for by MBI. 

    8. SALE OF PROPERTY DURING MR. VENKATADRI'S EMPLOYMENT.     

    (a) PURCHASE OF REPLACEMENT PROPERTY.  During the term of Mr. Venkatadri's
    employment by MBI, the Venkatadris may sell the Property and purchase new
    property to be used as their principal residence in the San Diego,
    California area (or other area in the event of an MBI-required relocation)
    (the "Replacement Property").  The Venkatadris may reinvest all of the
    proceeds of the sale in the Replacement Property.  

    (b) PERCENTAGE OWNERSHIP INTERESTS IN REPLACEMENT PROPERTY.  Each Partner
    will own an undivided interest in the Replacement Property as tenants in
    common, with their percentage ownership interests in the Replacement
    Property (the "Replacement Interests") calculated as follows:  

         (i) MBI's Replacement Interest shall be derived by dividing (A) the
         sum of (x) MBI's Initial Capital Contribution PLUS (y) MBI's
         Additional Capital Contributions, if any plus (2) the amount in excess
         of the sum of (x) plus (y) that MBI would have received if no
         Replacement Property had been purchased, by (B) the purchase price of
         the Replacement Property, with the result expressed as a percentage;
         and 

         (ii) The Venkatadris' Replacement Interest shall be equal to the sum
         of (A) 100% minus (B) MBI's Replacement Interest. 

    (c) RETURN OF EXCESS TO MBI.  In the event that the sum of MBI's Initial
    Capital Contribution and MBI's Additional Capital Contributions, if any, is
    greater than the purchase price of the Replacement Property, the
    Venkatadris will return such excess to MBI within 10 days after the closing
    of the purchase of the Replacement Property.

    (d) CONTINUING RIGHTS AND OBLIGATIONS WITH RESPECT TO REPLACEMENT PROPERTY. 
    All of the Partners' rights and obligations hereunder with respect to the
    Property will continue with respect to the Replacement Property.

    9. BOOKS AND RECORDS.  The Venkatadris shall keep books and records
relating to the maintenance, financing, taxation and ownership of the Property,
which may be inspected upon reasonable notice by MBI.

    10. TRANSFERS OR ENCUMBRANCES.  Neither Partner shall sell, transfer,
assign, pledge, or otherwise encumber or divest himself of ownership or control
of the Property or his or its Interest, whether voluntarily or by operation of
law, except as expressly permitted hereunder or with the prior written consent
of the other Partner. Notwithstanding the foregoing, MBI

                                          4


<PAGE>

may assign its Interest to an entity which it owns or controls.  If any
encumbrance affecting the Interest of a Partner or the Property exists in
violation of these restrictions, the Partner who granted or permitted the
encumbrance shall immediately proceed at his or its expense to remove the
encumbrance, and shall hold the other Partner harmless from any loss or expense
suffered as a consequence of the encumbrance.

    11.  TAXABILITY OF PAYMENTS.  In the event that Mr. Venkatadri is deemed to
receive taxable income for any payment or reimbursement by MBI under this
Agreement, such payments will be grossed up to account for all applicable income
taxes.

    12.  AMENDMENT.  This Agreement may be amended only by a written agreement
signed by all of the parties who are bound by this Agreement at the time.

    13.  NOTICES.  Any notice or other communication given under this Agreement
shall be duly given if, and only if, it is in writing and is delivered in person
to the intended recipient or is sent by certified mail, postage prepaid,
addressed, in MBI's case, to MBI at its principal office, and addressed, in the
Venkatadris' case, to Mr. Venkatadri at his residence as it appears on MBI's
books and records.  A party may change his address for this purpose by giving
notice of the change in the requisite manner.

    14.  CAPTIONS.  The captions of particular sections and subsections of this
Agreement have been inserted for convenience only and shall not affect the terms
of this Agreement.

    15.  GOVERNING LAW.  This Agreement shall be governed by the substantive
laws of the State of Delaware.

    16.  BINDING EFFECT.  This Agreement shall be binding on, an shall inure to
the benefit of, the parties and their respective heirs, legal representatives,
successors, and permitted assigns.


                                          *


                                          *


                                          *


                                          *


                                          *

                                          5


<PAGE>

IN WITNESS the parties have signed this Agreement on the date first given above.


Dated:  October 18, 1996
                                  MOLECULAR BIOSYSTEMS, INC.


                             By:   /s/ Gerard A. Wills
                                ----------------------------------------------
                                  Its: Vice President, Finance and CFO
                                      ----------------------------------------

                                   /s/ Bobba Venkatadri
                                  --------------------------------------------
                                   BOBBA VENKATADRI  

                                   /s/ Annapurna Bobba
                                 ---------------------------------------------
                                  MRS. ANNAPURNA BOBBA





                                          6

<PAGE>


                                                                     Exhibit 23




                      CONSENT OF INDEPENDENT PUBLIC ACCOUNTANTS


As independent public accountants, we hereby consent to the incorporation of our
report included in this Form 10-K, into the Company's previously filed
Registration Statements, File Numbers 33-723, 33-24508, 33-37872, 33-78564,
33-78572 and 333-02389.



                                  ARTHUR ANDERSEN LLP

San Diego, California
May 14, 1997





<TABLE> <S> <C>

<PAGE>
<ARTICLE> 5
<LEGEND>
THIS SCHEDULE CONTAINS SUMMARY FINANCIAL INFORMATION EXTRACTED FROM
THE CONSOLIDATED FINANCIAL STATEMENTS OF MOLECULAR BIOSYSTEMS, INC. 
DATED MARCH 31,1997 AND IS QUALIFIED IN ITS ENTIRETY BY REFERENCE TO 
SUCH FINANCIAL STATEMENTS.  
</LEGEND>
<MULTIPLIER> 1,000
       
<S>                             <C>
<PERIOD-TYPE>                   YEAR
<FISCAL-YEAR-END>                          MAR-31-1997
<PERIOD-START>                              APR-1-1996
<PERIOD-END>                               MAR-31-1997
<CASH>                                             587
<SECURITIES>                                    40,827
<RECEIVABLES>                                      902
<ALLOWANCES>                                         3
<INVENTORY>                                        342
<CURRENT-ASSETS>                                51,407
<PP&E>                                          19,622
<DEPRECIATION>                                   6,434
<TOTAL-ASSETS>                                  70,159
<CURRENT-LIABILITIES>                            7,564
<BONDS>                                              0
                                0
                                          0
<COMMON>                                           177
<OTHER-SE>                                      51,569
<TOTAL-LIABILITY-AND-EQUITY>                    70,159
<SALES>                                            626
<TOTAL-REVENUES>                                10,851
<CGS>                                            4,748
<TOTAL-COSTS>                                   25,702
<OTHER-EXPENSES>                                     0
<LOSS-PROVISION>                                     0
<INTEREST-EXPENSE>                                 810
<INCOME-PRETAX>                               (13,284)
<INCOME-TAX>                                         0
<INCOME-CONTINUING>                           (13,284)
<DISCONTINUED>                                       0
<EXTRAORDINARY>                                      0
<CHANGES>                                            0
<NET-INCOME>                                  (13,284)
<EPS-PRIMARY>                                   (0.78)
<EPS-DILUTED>                                        0
        

</TABLE>


© 2022 IncJournal is not affiliated with or endorsed by the U.S. Securities and Exchange Commission