A Spacer∕Injector Needle for ¹²⁵I and Other Radioactive Sources in Permanent Seed Implants

A spacer∕injector needle for ¹²⁵I and other radioactive sources is described. Exposure is minimized by speed, distance, and (in the case of ¹²⁵I) the low energy of the source shielded within the needle. Afterloading can easily be performed using small trocars. A readily attached plunger gives the needle a syringe (injection) action, while a rapid seed loader reduces loading time as well as the number of needles required when loading is carried out in the operating room.