关键词: 钴放射性同位素, 热敏发光剂量测定法, 剂量效应关系, 辐射

Abstract: Objective To study the irradiation doses in several kinds of ⁶0Co radiotherapy patients in order to improve the treatment project, reduce and prevent radio-cystitis. Methods The method of thermoluminescence with a model of imitating human was adopted, radiotherapy course of ⁶0Co was imitated,the irradiation dose of bladder in patients was monitored. Results In a radical cure course of treatment, the irradiation-induced bladder doses of anterior-posterior (AP) and posterior-anterior (PA) of pelvis cavity， AP and PA of chest cavity and front region of lower neck were 42.8，27.5，0.33，0.17, and 0.06 Gy, respectively. Conclusion The irradiation doses of bladder in AP and PA of pelvis cavity are bigger than those in other mode, which may be the main reason for radio-cystitis.

Key words: cobalt radioisotopes, thermoluminescent dosimetry, dose-respone relationship, radiation