Radiographic characterization and energy spectrum of the IoGold I-125 source Model 3631-A/S

Despite the growing popularity of permanent implants using encapsulated I-1 25 seeds, only two types were commercially available, Models 6702 and 6711. Recently, the Food and Drug Administration (FDA) approved a new type of I- 125 seed, Model 3631-A/S, called IoGold (apparent activity 0.28-0.63 mCi). Due to the large demand for I-125 seeds for prostate implants, IoGold seeds will be available in January 1998, In this paper, the basic properties of the IoGold seeds have been evaluated in comparison to the established Model s 6702 and 6711. (C) 1999 American Association of Physicists in Medicine. [ S0094-2405(99)01003-2].