医用放射治疗水平级电离剂量计性能比较

A Comparison of the Performances between the Ionization Chamber Dosimeters Used in Radiation Therapy

对治疗水平级电离剂量计的结构原理及性能技术指标要求作简要介绍,并对我国医院放疗单位使用得较多的四种剂量计的标称性能指标作一比较,四种剂量计技术指标基本满足IEC731及JJG912-96中所现定的工作级剂量计的技术要求,配备合适的电离室,可作为医院放疗单位工作级剂量计使用,最后讨论了电剂量计的使用注意事项。

The structural principles and technical performances of different ionization chamber dosimeters used in radiotherpay have been briefly introduced in this paper. In the mean time, a comparison of technical performances of four different kinds of ionization chamber dosimeter used in hospitals in china has also been made. The data show their quality meet the required specification specified by IEC731 and JJG912-96, so they can be used as field survey dosimeters in hospitals. Some precautions in using these dosimeters are given here too .