GRANAHAN INVESTMENT MANAGEMENT INC /ADV
SC 13G, 1999-02-11
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                       SECURITIES AND EXCHANGE COMMISSION
                             WASHINGTON, D.C. 20549

                                  SCHEDULE 13G
                                 (RULE 13d-102)



             INFORMATION TO BE INCLUDED IN STATEMENTS FILED PURSUANT
           TO RULES 13d-1(b)(c), AND (d) AND AMENDMENTS THERETO FILED
                            PURSUANT TO RULE 13d-2(b)

                                (AMENDMENT NO.  )*


                            Vivid Technologies, Inc.
               --------------------------------------------------
                                (Name of Issuer)

                                  Common Stock
               --------------------------------------------------
                         (Title of Class of Securities)

                                    928538107
               --------------------------------------------------
                                 (CUSIP Number)

                                December 31, 1998
- -------------------------------------------------------------------------------
             (Date of Event Which Requires Filing of this Statement)


Check the appropriate box to designate the rule pursuant to which this Schedule
is filed:

     [X] Rule 13d-1(b)

     [ ] Rule 13d-1(c)

     [ ] Rule 13d-1(d)

     *The remainder of this cover page shall be filled out for a reporting
person's initial filing on this form with respect to the subject class of
securities, and for any subsequent amendment containing information which would
alter the disclosures provided in a prior cover page.

     The information required in the remainder of this cover page shall not be
deemed to be "filed" for the purpose of Section 18 of the Securities Exchange
Act of 1934 ("Act") or otherwise subject to the liabilities of that section of
the Act but shall be subject to all other provisions of the Act (however, see
the Notes).

                                Page 1 of 6 pages
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<TABLE>
<CAPTION>

CUSIP NO. 928538107                                                  13G                        PAGE      OF     PAGES
          ---------                                                                                  ----    ----
- ----------------------------------------------------------------------------------------------------------------------
- ----------------------------------------------------------------------------------------------------------------------
<S>   <C>                                                                                        <C>
1     NAMES OF REPORTING PERSONS
      I.R.S. IDENTIFICATION NO. OF ABOVE PERSONS (ENTITIES ONLY)

      Granahan Investment Management, Inc.  04-2856200
- ----------------------------------------------------------------------------------------------------------------------
2     CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP*
                                                                                                      (a)  / /

                                                                                                      (b)  / /
- ----------------------------------------------------------------------------------------------------------------------
3     SEC USE ONLY

- ----------------------------------------------------------------------------------------------------------------------
4     CITIZENSHIP OR PLACE OF ORGANIZATION

      Massachusetts

- ----------------------------------------------------------------------------------------------------------------------
- ----------------------------------------------------------------------------------------------------------------------
NUMBER OF SHARES                 5     SOLE VOTING POWER
                                       543,000
                                 -------------------------------------------------------------------------------------
BENEFICIALLY                     6     SHARED VOTING POWER
                                       0
                                 -------------------------------------------------------------------------------------
OWNED BY                         7     SOLE DISPOSITIVE POWER
EACH                                   543,000
                                 -------------------------------------------------------------------------------------
REPORTING                        8     SHARED DISPOSITIVE POWER
PERSON WITH                            0
- ----------------------------------------------------------------------------------------------------------------------
- ----------------------------------------------------------------------------------------------------------------------
9      AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON

       543,000
- ----------------------------------------------------------------------------------------------------------------------
10     CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES*

                                                                                                      / /
- ----------------------------------------------------------------------------------------------------------------------
11     PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW 9

       5.3%
- ----------------------------------------------------------------------------------------------------------------------
12     TYPE OF REPORTING PERSON*

       IA
- ----------------------------------------------------------------------------------------------------------------------
- ----------------------------------------------------------------------------------------------------------------------
</TABLE>

                      *SEE INSTRUCTIONS BEFORE FILLING OUT!

                                Page 2 of 6 pages
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Item 1(a).    NAME OF ISSUER:

              Vivid Technologies, Inc.


Item 1(b).    ADDRESS OF ISSUER'S PRINCIPAL EXECUTIVE OFFICES:

              10E Commerece Way
              Woburn, MA 01801


Item 2(a).    NAME OF PERSON FILING:

              Granahan Investment Management, Inc.


Item 2(b).    ADDRESS OF PRINCIPAL BUSINESS OFFICE OR, IF NONE, RESIDENCE:

              275 Wyman Street, Suite 270
              Waltham, MA 02154

Item 2(c).    CITIZENSHIP:

              Massachusetts

Item 2(d).    TITLE OF CLASS OF SECURITIES:

              Common Stock

Item 2(e).    CUSIP NUMBER:

              928538107

Item 3.       IF THIS STATEMENT IS FILED PURSUANT TO RULE 13d-1(b), OR 13d-2(b) 
              OR (c), CHECK WHETHER THE PERSON FILING IS A:

         (a)  [ ]   Broker or dealer registered under Section 15 of the Exchange
                    Act.

         (b)  [ ]   Bank as defined in Section 3(a)(6) of the Exchange Act.

         (c)  [ ]   Insurance company as defined in Section 3(a)(19) of the
                    Exchange Act.

                                Page 3 of 6 pages
<PAGE>

         (d)  [ ]   Investment company registered under Section 8 of the 
                    Investment Company Act.

         (e)  [X]   An investment adviser in accordance with Rule 13d-1(b)(1)
                    (ii)(E).

         (f)  [ ]   An employee benefit plan or endowment fund in accordance
                    with Rule 13d-1(b)(1)(ii)(F).

         (g)  [ ]   A parent holding company or control person in accordance
                    with Rule 13d-1(b)(1)(ii)(G).

         (h)  [ ]   A savings association as defined in Section 3(b) of the
                    Federal Deposit Insurance Act.

         (i)  [ ]   A church plan that is excluded from the definition of an
                    investment company under Section 3(c)(14) of the Investment
                    Company Act.

         (j)  [ ]   Group, in accordance with Rule 13d-1(b)(1)(ii)(J).

         If this statement is filed pursuant to Rule 13d-1(c), check this box.
         [ ]

Item 4.       OWNERSHIP


         (a)        Amount beneficially owned: 543,000

         (b)        Percent of class: 5.3%

         (c)        Number of shares as to which such person has:

                    (i)   sole power to vote or to direct the vote:   543,000

                    (ii)  shared power to vote or to direct the vote: 0

                    (iii) sole power to dispose or to direct the disposition of:
                          543,000

                    (iv)  shared power to dispose or to direct the disposition 
                          of:     0

Item 5.       OWNERSHIP OF FIVE PERCENT OR LESS OF A CLASS

     If this statement is being filed to report the fact that as of the date
hereof the reporting person has ceased to be the beneficial owner of more than
five percent of the class of securities, check the following [X].

                                Page 4 of 6 pages
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Item 6.       OWNERSHIP OF MORE THAN FIVE PERCENT ON BEHALF OF ANOTHER PERSON


              Certain other persons have the right to receive or the power to
              direct the receipt of dividends from, or the proceeds from the
              sale of, the class of securities which are subject to this report.


Item 7.       IDENTIFICATION AND CLASSIFICATION OF THE SUBSIDIARY WHICH ACQUIRED
              THE SECURITY BEING REPORTED ON BY THE PARENT HOLDING COMPANY
                  


              Not Applicable.


Item 8.       IDENTIFICATION AND CLASSIFICATION OF MEMBERS OF THE GROUP


              Not Applicable.


Item 9.       NOTICE OF DISSOLUTION OF GROUP


              Not Applicable.


Item 10.      CERTIFICATION


              By signing below I certify that, to the best of my knowledge and
         belief, the securities referred to above were acquired in the ordinary
         course of business and were not acquired and are not held for the
         purpose of or with the effect of changing or influencing the control of
         the issuer of the securities and were not acquired and are not held in
         connection with or as a participant in any transaction having that
         purpose or effect.



                                Page 5 of 6 pages

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                                    SIGNATURE

     After reasonable inquiry and to the best of my knowledge and belief, I
certify that the information set forth in this statement is true, complete and
correct.

                             GRANAHAN INVESTMENT MANAGEMENT, INC.



Date:  February 1, 1999                   By: /s/ John J. Granahan  
                                             ----------------------



                                             John J. Granahan, President
                                             ---------------------------
                                             Name/Title





                                Page 6 of 6 pages


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