摘要
目的:遵照IEC和IAEA相关技术规范的要求,为了建立用于校准诊断X射线剂量仪的标准辐射场,在实验室测定了新装MG325X射线机常用的RQR系列辐射线质。方法:通过标准剂量仪测量吸收铝片主射线束的衰减,测定X射线的第一、第二半值层及同质系数,确定常用的RQR辐射线质。结果:测定的RQR辐射线质半值层等参数与IEC和IAEA给出的主要技术指标误差小于3%,满足国际标准要求。结论:建立的诊断X射线标准场可以用于校准诊断X射线剂量仪及开展国际比对。
Objective： According to the RQR requirement of IEC and IAEA, half value layer was determined in the X-ray diagnostic qualities for the establishment of standard calibration field. Methods： Attenuation ratio of a series of aluminum absorbers with variable thickness was measured by a dosimeter with well-energy response at the good geometric condition. Results： The technical requirement of IEC and IAEA were met within 3% for the X-ray diagnostic qualities in Beijing SSDL. Conclusion： New RQR standard radiation field can be used for the calibration of X-ray diagnostic dosimeters and international comparisons.
出处
《中国医学装备》
2009年第6期1-4,共4页
China Medical Equipment
关键词
X射线标准辐射场
RQR辐射线质
半值层测定
X-ray standard calibration field
RQR calibration qualities
Determination of half value layer
