Clinic dosimetry for election intra-operative radiotherapy （IORT）

Since 1972, IORT was started at the PLA general hospital, and the use of beam of high energy electron was begun after 1979. New equipment especially for IORT was then designed, which was attached to the head of the accelerator, and the cone is inserted directly into the tumor of the patient. Clinic dosimetry has been investigated for the output dose factor, the surface dose, the 90% area, the x-Ray contamination, radiation leakage from the equipment, and beam profiles in each cone. TLD was also monitored for patients.