摘要
为了保证诊断X射线设备应用的安全有效,针对三种型号的多参数测量仪,分析了测量过程中可能对半值层测量产生影响的诸多因素,比如X射线管电压、管电流、曝光时间、半值层仪的摆放位置等,设计多组对照试验。试验结果显示,管电压的偏差会导致半值层的改变,合适的曝光时间可以获得更加稳定的测量结果。
At present,there are many kinds of multi-parameter measuring instruments with the function of half-value layer(HVL)measurement in the market,which can be used to measure the HVL value of diagnostic X-ray equipment.Based on three types of multi-parameter measuring instrument,we analyze many factors that may affect the measurement of HVL,such as X-ray tube voltage,tube current,exposure time,and the placement of the HVL instrument,and then design several groups of control tests.The test results show that the deviation of the tube voltage leads to changes of the HVL and that more stable measurement results can be obtained with appropriate exposure time.
作者
王家伟
魏鹏
马伯轩
李德红
郭彬
WANG Jiawei;WEI Peng;MA Boxuan;LI Dehong;GUO Bin(Anhui Institute of Metrology,Hefei 230051,China;Fujian Institute of Metrology,Fuzhou 350003,China;National Institute of Metrology,Beijing 100029,China)
出处
《计量科学与技术》
2021年第8期3-6,28,共5页
Metrology Science and Technology
基金
国家重点研发计划资助(2018YFF0212403)。
关键词
半值层
诊断X射线
管电压
管电流
曝光时间
half-value layer
diagnostic X-ray
tube voltage
tube current
exposure time
