UNITED STATES
                       SECURITIES AND EXCHANGE COMMISSION
                             WASHINGTON, D.C. 20549

                                    FORM 10-Q/A

                QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d)
                     OF THE SECURITIES EXCHANGE ACT OF 1934

For the Quarter Ended                         Commission File No.
   March 31, 1998                                  0-15443

  THERAGENICS CORPORATION
       (Exact name of registrant as specified in its charter)


        Delaware                           58-1528626
(State of incorporation)      (I.R.S. Employer Identification Number)



       5325 Oakbrook Parkway
        Norcross, Georgia                             30093
(Address of principal executive offices)               (Zip Code)



Registrant's telephone number, including area code: (770) 381-8338

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

As of May 12,  1998,  the  aggregate  market  value of the  common  stock of the
registrant held by  non-affiliates  of the registrant as determined by reference
to the closing price of Common Stock as reported on the Nasdaq  National  Market
System,  was  $765,925,965.  As of May 12,  1998 the  number of shares of common
stock, $.01 par value, outstanding was 29,178,132.


<PAGE>


                         PART I - FINANCIAL INFORMATION

Item 1. - Financial Statements

                             THERAGENICS CORPORATION
                                 BALANCE SHEETS
                      DECEMBER 31, 1997 AND MARCH 31, 1998

                                     ASSETS

<TABLE>

<CAPTION>
                                                       December 31,               March 31,
                                                          1997                      1998                    
                                                      ------------             ------------             
                                                                                (Unaudited)
<S>                                                  <C>                       <C>   
CURRENT ASSETS
   Cash and short-term investments                    $ 30,161,614             $ 24,201,105
   Marketable Securities                                 8,391,807                8,391,807
   Trade accounts receivable, less
     allowance of $65,446 in 1997
     and $84,480 at March 31, 1998.                      2,925,390                3,580,036
   Inventories                                             433,873                  548,666
   Prepaid expenses and other current assets               160,620                  121,899
                                                      -------------             ------------
     TOTAL CURRENT ASSETS                               42,073,304               36,843,513

PROPERTY AND EQUIPMENT
   Building                                              3,333,728                3,333,728
   Leasehold improvement                                   138,978                  138,978
   Machinery and equipment                              14,698,623               14,986,600
   Office furniture and equipment                           66,464                   95,400
                                                     --------------             ------------
                                                        18,237,793               18,554,706
   Less accumulated depreciation
         and amortization                               (4,695,669)             ( 5,100,844)
                                                        13,542,124               13,453,862
   Land                                                    525,754                  525,754
   Construction in progress (Note B)                    14,917,788               27,774,184
                                                     -------------              ------------
     TOTAL PROPERTY & EQUIPMENT                         28,985,666               41,753,800

OTHER ASSETS
   Patent costs                                             71,836                   69,623
   Other                                                     9,503                    9,251
                                                     -------------              ------------
         TOTAL OTHER ASSETS                                 81,339                   78,874  
                                                         
       TOTAL ASSETS                                   $ 71,140,309             $ 78,676,187

                                                     =============              ============

</TABLE>
<PAGE>


                             THERAGENICS CORPORATION

                                 BALANCE SHEETS
                                   (Continued)

                      DECEMBER 31, 1997 AND MARCH 31, 1998

                      LIABILITIES AND STOCKHOLDERS' EQUITY
<TABLE>
<CAPTION>

                                                        December 31,           March 31,
                                                           1996                  1998
                                                      --------------       ---------------
                                                                             (Unaudited)
<S>                                                   <C>                     <C> 
CURRENT LIABILITIES:
  Trade accounts payable                                1,435,154               4,642,502
  Accrued salaries, wages, and payroll taxes              689,610                 356,416
  Income taxes payable                                    845,364               1,881,522
  Other current liabilities                               137,097                 296,230
                                                       -----------             -----------
    TOTAL CURRENT LIABILITIES                           3,107,225               7,176,670

LONG TERM LIABILITIES:
  Deferred income taxes                                 1,000,000               1,075,000

STOCKHOLDERS' EQUITY: (Note C)  
  Common stock, $.01 par value,
  50,000,000 share authorized;  29,075,682 
  and 29,091,812 shares had been issued
  as of December 31, 1997 and March 31, 1998, 
  respectively.                                           290,757                  290,918
  Additional paid-in capital                           55,594,987               55,685,703
  Retained earnings                                    11,147,340               14,447,896
                                                      ------------             ------------
    TOTAL STOCKHOLDERS' EQUITY                         67,033,084               70,424,517
                                                      ------------             ------------

      TOTAL LIABILITIES/
      STOCKHOLDERS' EQUITY                            $71,140,309             $ 78,676,187
                                                      ============             ============
  

<PAGE>

</TABLE>



         The accompanying notes are an integral part of these statements.



                             THERAGENICS CORPORATION
                  STATEMENT OF CHANGES IN STOCKHOLDERS' EQUITY
                    FOR THE THREE MONTHS ENDED MARCH 31, 1998
                                   (Unaudited)
<TABLE>
<CAPTION>



                                                   Common Stock           Additional
                                              Number of    Par Value       Paid-in        Retained
                                               shares        $.01         Capital         Earnings        Total
<S>                                        <C>            <C>           <C>             <C>           <C>

BALANCE, December 31, 1997, as 
  adjusted for stock split........         29,075,682     $ 290,757     $55,594,987     $11,147,340   $67,033,084
 Exercise of stock options........             16,130           161          35,491                        35,652
 Income tax benefit from stock
  options exercised...............                                           55,225                        55,225
 Net earnings for the period......                                                     
                                                                                          3,300,556     3,300,556
                 

BALANCE, March 31, 1998...........         29,091,812     $ 290,918     $55,685,703     $14,447,896   $70,424,517
                                         
</TABLE>

The accompanying notes are an integral part of these statements.



<PAGE>


PART II - OTHER INFORMATION

Item 6.- Exhibits and Reports on Form 8-K


         (a)       Exhibit 27 - Financial Data Schedule

         (b)       Reports on Form 8-K.

                   No reports on For 8-K were filed during the quarter ended 
                   March 31, 1998.




<PAGE>




                                    SIGNATURE

Pursuant  to the  requirements  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.



                                    REGISTRANT:

                                    THERAGENICS CORPORATION


                                    By:  /s/ M. Christine Jacobs
                                         -----------------------
                                         M. Christine Jacobs
                                         President


                                         /s/ Bruce W. Smith
                                         ------------------
                                         Bruce W. Smith
                                         Treasurer and
                                         Chief Financial Officer



Dated: June 30, 1998