Exhibit 16.1
March 19, 2007
U.S. Securities and Exchange Commission
Office of the Chief Accountant
100 F Street, NE
Washington, DC 20549
| Re: | Theragenics Corporation File No. 000-15443 |
Dear Sir or Madam:
We have read Item 4.01 of Form 8-K of Theragenics Corporation dated March 19, 2007, and agree with the statements concerning our Firm contained therein.
Very truly yours,
/s/ GRANT THORNTON LLP