[Radiology] This study found that a 185 MBq (5 mCi) diagnostic I-131 scan did not cause stunning prior to I-131 therapy. The effect was based upon the rate of successful I-131 therapy in patients with thyroid cancer s/p thyroidectomy.

131I Therapeutic Efficacy Is Not Influenced by Stunning after Diagnostic Whole-Body Scanning

Hung Q. Dam, MD, Sung M. Kim, MD, Henry C. Lin, MD and Charles M. Intenzo, MD

http://radiology.rsnajnls.org/cgi/c...tract/232/2/527

Radiology 2004;232:527-533