数字化X射线胃肠机的质量控制检测研究  

Study on the testing for quality control of digital X-ray gastrointestinal machine

作　　者：杜伟翔 闵高瑜 赵峰[1] 胡益斌[1] DU Wei-xiang;MIN Gao-yu;ZHAO Feng(Department of Clinical Medical Engineering,The First Affiliated Hospital with Nanjing Medical University,Nanjing 210029,China;不详)

机构地区：[1]南京医科大学第一附属医院临床医学工程处,江苏南京210029

出　　处：《中国医学装备》2023年第12期15-19,共5页China Medical Equipment

摘　　要：目的:研究数字化X射线胃肠机的质量控制检测方法,确保设备安全有效运行。方法:依据国家卫生行业标准《医用X射线诊断设备质量控制检测规范》(WS76-2020),对数字化X射线胃肠机进行质量控制检测。采用多功能射线剂量仪及相应模体,对数字化X射线胃肠机的管电压指示的偏离、半值层、透视受检者入射体表空气比释动能率、高对比度分辨力等参数进行检测,评价其质量控制检测是否符合国家规范要求。结果:数字化X射线胃肠机经质量控制检测,81kV和90 kV的管电压指示的偏离最大值分别为0.86%和0.97%;辐射输出重复性为0.1%;半值层为3.12 mmAI;透视受检者入射体表空气比释动能率典型值和最大值分别为5.316 mGy/min和18.63 mGy/min;透视高对比度分辨力为1.6 lp/mm;透视低对比度分辨力为3.3%;有用线束垂直度<1.5°;光野与照射野四边的偏离右边界(a_(1))为-0.6 cm,左边界(a_(2))为-0.1 cm,下边界(b_(1))为0 cm,上边界(b_(2))为-0.7 cm;测距误差中水平相对偏差0.3%,垂直相对偏差0.5%;在曝光时间(t)的偏离中,50 ms时偏差为9.42%,140 ms时偏差为2.14%;影像无明显伪影。数字化X射线胃肠机的质量控制检测符合卫生行业标准规范要求。结论:采用多功能射线剂量仪和相应模体对数字化X射线胃肠机进行质量控制检测,能够反映设备的性能状态,确保设备在临床诊疗中安全有效运行。Objective:To study the testing method of quality control of digital X-ray gastrointestinal machine,so as to ensure safe and effective operation of the equipment.Methods:According to the National Health Industry Standard<Specification for Testing of Quality Control in Medical X-ray Diagnostic Equipment>(WS 76-2020),the quality control of digital X-ray machine for the stomach and intestine was tested.The multifunctional X-ray dosimeter and the corresponding phantom were adopted to detect the deviation of the tube voltage indication,the half-value layer(HVL),the Kerma rate of incident body surface air of the subjects who received fluoroscopy examination,the high-contrast resolution and other parameters of the digital X-ray gastrointestinal machine.And then,whether the testing of quality control of that complied with the requirement of national regulations were further evaluated.Results:The detection of quality control of digital X-ray gastrointestinal machine indicated that the maximum deviation values of the tube voltage indications of 81kV and 90kV were respectively 0.86%and 0.97%,and the repeatability of radiation output was 0.1%,and the HVL was 3.12mmAI,and the typical value and the maximum value of the Kerma rate of incident body surface air of the subjects who received fluoroscopy examination were respectively 5.316mGy/min and 18.63mGy/min,and the high-contrast resolution of fluoroscopy was 1.6 lp/mm,and the low-contrast resolution of fluoroscopy was 3.3%,and the vertical angle of the useful wire beam was<1.5°,and the deviations between the light field and each boundary of right,left,lower and upper boundaries of the radiation field were respectively(a_(1))=-0.6cm,(a_(2))=-0.1cm,(b_(1))=0cm and(b_(2))=-0.7cm.In addition,the horizontally and vertically relative deviations of range errors were respectively 0.3%and 0.5%.In the deviations of exposure times(t),the deviations of t=50ms and t=140ms were respectively 9.42%and 2.14%.The images did not have obvious artifact.The above results indicated that the testing

关 键 词：数字化X射线胃肠机 质量控制 性能检测 质控模体 多功能射线剂量仪 

分 类 号：R812[医药卫生—放射医学]