EMERALD ADVISERS INC /PA/ /ADV
SC 13G, 1998-02-17
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                                 UNITED STATES
                      SECURITIES AND EXCHANGE COMMISSION
                            Washington, D.C. 20549


                                 SCHEDULE 13G

                   Under the Securities Exchange Act of 1934
                              (Amendment No.  1  )*
                                        


 SMT Health Services, Inc.
- --------------------------------------------------------------------------------
                                (Name of Issuer)

 SMT Health Services, Inc. Common Stock par value .01.
- --------------------------------------------------------------------------------
                         (Title of Class of Securities)


                                    784585101
                               ------------------
                                 (CUSIP Number)






*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 4 pages


SEC 1745 (2095)
<PAGE>
 

- -----------------------                                  ---------------------
  CUSIP NO. 784585101                   13G                PAGE 2 OF 4 PAGES
- -----------------------                                  ---------------------
 
- ------------------------------------------------------------------------------
      NAME OF REPORTING PERSON
 1    I.R.S. IDENTIFICATION NO. OF ABOVE PERSON
      
      Emerald Advisers, Inc.

- ------------------------------------------------------------------------------
      CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP*
 2                                                              (a) [_]
                                                                (b) [_]
                                                 
- ------------------------------------------------------------------------------
      SEC USE ONLY
 3
 

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

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

- ------------------------------------------------------------------------------
      CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES*
10                  
                                                                    [_]
 
- ------------------------------------------------------------------------------
      PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW 9
11    
      0%           

- ------------------------------------------------------------------------------
      TYPE OF REPORTING PERSON*
12
      IA         

- ------------------------------------------------------------------------------

                     *SEE INSTRUCTIONS BEFORE FILLING OUT!


<PAGE>
 
Schedule 13G                                                        Page 3 of 4
Emerald Advisers, Inc.

Item 1.

         (a)      The name of the issuer is SMT Health Services, Inc.

         (b)      The address of issuer's principal executive offices is 10521
                  Perry Highway, Wexford, PA 15090.

Item 2.

         (a)      The name of the person filing is Emerald Advisers, Inc.

         (b)      The address of the principal business office of person filing
                  is 1857 William Penn Way, Lancaster, Pennsylvania 17601.

         (c)      The state of organization is Pennsylvania.

         (d)      The title of the class of security is common stock par 
                  value .01.

         (e)      The CUSIP number is 784585101.

Item 3.

         (e)      The person filing is an Investment Adviser registered under
                  section 203 of the Investment Advisers Act of 1940.

Item 4.

         (a)      The amount beneficially owned is 0.

         (b)      The percent of class is 0%

         (c)(i)   The number of shares as to which Emerald Advisers, Inc. has 
                  sole voting power is 0.

         (c)(ii)  The number of shares as to which Emerald Advisers, Inc. has 
                  shared voting power is 0.

         (c)(iii) The number of shares as to which Emerald Advisers, Inc. has 
                  sole dispositive power is 0.

         (c)(iv)  The number of shares as to which Emerald Advisers, Inc. 
                  holds shared dispositive power is 0.
<PAGE>
 
Schedule 13G                                                        Page 4 of 4
Emerald Advisers, Inc.

Item 5.

         This Schedule 13G-Amendment number 1 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.


Item 6.

         Not applicable.

Item 7.

         Not applicable.

Item 8.

         Not applicable.

Item 9.

         Not applicable.

Item 10.

         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 for the purpose of and do not have the effect of
changing or influencing the control of the issuer of such securities and were
not acquired in connection with or as a participant in any transaction having
such purposes or effect.

                                   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.

                                         -------------------------------------
                                                        Date
 
                                         -------------------------------------
                                                        Signature

                                          Scott L. Rehr, Senior Vice President


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