Exhibit
31.1





CERTIFICATION





I, M.
Christine Jacobs, Chief Executive Officer, certify that:





1.    I
have reviewed this report on Form 10-K of Theragenics Corporation;





2.    Based
on my knowledge, this annual report does not contain any untrue statement of a
material fact or omit to state a material fact necessary to make the statements
made, in light of the circumstances under which such statements were made, not
misleading with respect to the period covered by this report;





3.    Based
on my knowledge, the financial statements, and other financial information
included in this report, fairly present in all material respects the financial
condition, results of operations and cash flows of the registrant as of, and
for, the periods presented in this report;





4.    The
registrant's other certifying officer and I are responsible for establishing and
maintaining disclosure controls and procedures (as defined in Exchange Act Rules
13a-15(e) and 15d-15(e)) and internal control over financial reporting (as
defined in Exchange Act Rules 13a-15(f) and 15(d)-15(f))) for the registrant and
have:





a)    designed such disclosure controls
and procedures, or caused such disclosure controls and procedures to be designed
under our supervision, to ensure that material information relating to the
registrant, including its consolidated subsidiaries, is made known to us by
others within those entities, particularly during the period in which this
report is being prepared;





b)    designed such internal
control over financial reporting, or caused such internal control over financial
reporting to be designed under our supervision, to provide reasonable assurance
regarding the reliability of financial reporting and the preparation of
financial statements for external purposes in accordance with generally accepted
accounting principles;





c)    evaluated the
effectiveness of the registrant's disclosure controls and procedures and
presented in this report our conclusions about the effectiveness of the
disclosure controls and procedures, as of the end of the period covered by this
report based on such evaluation; and





d)    disclosed in this report
any change in the registrant's internal control over financial reporting that
occurred during the registrant's most recent fiscal quarter that has materially
affected, or is reasonably likely to materially affect, the registrant's
internal control over financial reporting.





5.    The
registrant's other certifying officer and I have disclosed, based on our most
recent evaluation of internal control over financial reporting,  to
the registrant's auditors and the audit committee of the registrant's board of
directors (or persons performing the equivalent functions):





a)    all significant deficiencies and
material weaknesses in the design or operation of internal control over
financial reporting which are reasonably likely to adversely affect the
registrant's ability to record, process, summarize and report financial
information; and




b)    any
fraud, whether or not material, that involves management or other employees who
have a significant role in the registrant’s internal control over financial
reporting.







Date:
March 13, 2008





/s/ M. Christine
Jacobs


M.
Christine Jacobs


Chief
Executive Officer