Radio-Iridium Teletherapy

Abstract

The possibilities of Ir192 as a source of gamma-rays for tele-therapeutic units were investigated, and the design of a complete unit is described. An output of about 11 r/min. at 8 cm. f.s.d. is obtained from a unit weighting 50 lbs., which nevertheless has sufficient lead protection to make pneumatic control unnecessary. Measurements of protection, absorption and dose distribution have been made. Future developments leading to improved design and increased output are discussed.