The TLD(thermoluminescent dosimetry)must be calibrated before used in individual dosimetry.In this paper,some related issues that affect the accuracy of calibration,including principle and performance of the instruments,conditions of annealing and measuring,method of curve fitting are discussed and an appropriate calibration method is proposed.The results show that the method we proposed is valid and efficient,which ensures the accuracy of individual dosimetry.

Operation of radiological equipment affects not only the quality of clinical diagnosis & treatment,but also the health of the radiographer and subjects.The operation and safety protection of the aged radiological equipment in primary medical units has to be paid particular attention to.Based on the survey,some advices are put forward from the aspects of equipment management,personnel training and protection supervision.