Study on the dose of sperm aries irradiated with 6 MV-X rays in different unit of the patient's body

Purpose: To know the dose of spermary when the patient was radio-treated in head-neck, in thorax, in abdomen with 6MV-X rays, so as to afford experimental dependencies for clinical therapy plan. Methods and Materials ;Put the thermoluminescent dosimeters (TLD) in a tissue-equivalent anthropomorphic phantom's spermary and irradiated with 6 MV-X rays in different unit of the phantom to measure absorbed doses of spermary. Results: Irradiated in the same unit, both of spermaries' doses are not different, while in different unit, the doses of spermary are different. If 1 Gy dose was given in head-neck or in thorax or in abdomen, the doses that spermary absorbed were 0.155 mGy, 0.340 mGy and 32.075 mGy. conclusion: the routine radiotherapy to the tumour in abdomen will damage spermary, the effective method to decrease the dose of spermary is to use screen blanker