摘要
目的对摄影设备"焦点到影像接收器之间的距离指示值偏离"一项检测方法进行分析和研究。方法根据《医用常规X射线诊断设备影像质量控制检测规范》(WS76—2011)中规定的方法,给出计算过程和推导方法。结果在p值可精确获得时可采用国标方法进行计算,在p值较难精确获得时可采用推导方法。结论新国家标准对检测结果的合格范围要求更加严格,应结合实际情况,合理选用方法,尽量减少测量误差。
Objective To study and analyze the methods for testing accuracy of the indicator for ＂focal spot to image receptor distance＂ in roegenographic equipment.Methods According to the national standard of ＂Specification for Testing of Image Quality Control in Regular Medical X-Ray Diagnostic Equipment＂（WS 76—2011）,the distance from focal spot to image receptor of roetgenographic equipment was calculated and inferred.Results The distance of ＂focal spot to image receptor distance＂ in roegenographic equipment,with the value of p as its indicator,can be accurately measured using international standard method,otherwise it was measured by inference method.Conclusion Appropriate method should be selected according to actual situation in measurement to reduce error in measuring the distance of ＂focal spot to image receptor distance＂ in roegenographic equipment,as the requirements for acceptance range of measurement results become more strict in the new national standard.
出处
《首都公共卫生》
2011年第5期225-227,共3页
Capital Journal of Public Health
关键词
指示值
偏离
精度
误差
Roentgenography
Distance from focal spot to image receptor（SID）
Indicator
Deviation
Accuracy
Error
