Niroomand-Rad A
Department of Radiation Medicine, Georgetown University Medical Center, Washington, D.C. 20007-2197.
Radiat Med. 1990 Nov-Dec;8(6):238-45.
Brachytherapy, which refers to short-distance treatment via implanted sources, requires an accurate knowledge of the dose distribution in the implant volume. A critical step in the determination of the dose distribution involves an accurate calibration of brachytherapy source strength. Following the guidelines recommended by AAPM Task Group No. 22, a routine calibration procedure for brachytherapy sources 137-Cs, 192-Ir, and 125-I has been developed. The calibration of sources is performed with a well-type dose calibrator using standard calibrated sources obtained from the American, British, and French national laboratories. Selected characteristics of the dose calibrator are reported, and some of the problems associated with the dose calibrator are discussed. The results of a comparison of the calibrated sources from the three national laboratories are presented.
近距离放射治疗是指通过植入源进行的短距离治疗，它需要精确了解植入体积内的剂量分布。确定剂量分布的关键步骤之一是对近距离放射治疗源强度进行精确校准。按照美国医学物理学会第22任务组推荐的指南，已制定了针对137-Cs、192-Ir和125-I近距离放射治疗源的常规校准程序。使用从美国、英国和法国国家实验室获得的标准校准源，通过井型剂量校准器对源进行校准。报告了剂量校准器的选定特性，并讨论了与剂量校准器相关的一些问题。给出了三个国家实验室校准源的比较结果。
