诊断X射线剂量检测仪的研制  

Research on development of diagnostic X-ray dosimeter

作　　者：王伟[1] 张建[1] 宁静[1] 

机构地区：[1]军事医学科学院放射与辐射医学研究所,北京100850

出　　处：《中国医学装备》2014年第8期25-28,共4页China Medical Equipment

基　　金：军事医学计量科研专项课题(2011-JL2-056)"CT计量测量方法研究与测量标准建立"

摘　　要：目的：研制一款用于测量诊断X射线装置辐射输出量、输出量率的剂量检测仪.方法：选用高灵敏PIN结半导体探测器,通过附加一定厚度铝片和喷涂金属粉末的塑料联合补偿材料,改善探测器在诊断X射线能量范围内的能量响应.基于数字单片机技术的设计,以高速C8051F310微控制器内核作为控制系统的前置放大电路及微功耗高速A/D转换电路,以RS232接口进行通讯,上位机软件基于Windows操作系统,使用VC＋＋语言编写.结果：探测器的能量响应好于5％（70 ～ 150 kV）,测量精确度为士0.071％（SD）,稳定度为士0.18％（SD）.结论：该诊断X射线剂量仪体积小,全数字化,灵敏度高,测量范围宽,性能指标达到国家标准要求,可用于诊断X射线装置常规计量测量与质量保证.Objective：A diagnostic X-ray dosimeter for measuring radiation Dose and dose rate was designed and developed.Methods：The detector is made of PIN semiconductor of Si diode as a receiver to radiation signal.To meet the requirements of energy response,the detector is compensated by aluminum sheet and plastic with metal powder.Designed the preamplifier circuit and high rate A/D circuit with the core of controller system is C8051F310 MCU.The VC＋＋ software is taken as the development platform based on windows system,communication by RS232 interface.Results：The energy response of detector from（70～150kV） is less than 5％.The device can provide a good precision ±0.071％（SD） and stability ±0.18％（SD）.Conclusion：The semiconductor dosimeter of diagnosis X-ray has small size,fast real-time response,good energy response,wide measuring range and so on.The performance of device meet the standard of national.The dosimeter can be used to metrology test and quality control （QC） for general Diagnostic X-ray Device.

关 键 词：诊断X射线 剂量仪 PIN硅光二极管 半导体探测器 

分 类 号：R144.1[医药卫生—公共卫生与预防医学]