医疗电气设备 - 剂量面积产品表

[中文适用范围]： 本文件规定了用于测量患者在接受医学放射检查时所暴露的剂量面积乘积和/或剂量面积乘积率的剂量面积乘积计的性能和测试要求。 本文件适用于以下类型的剂量面积乘积计： a) 现场级剂量面积乘积计，通常用于医学放射检查期间测量剂量面积乘积； b) 参考级剂量面积乘积计，通常用于校准现场级剂量计。 注：参考级剂量面积乘积计也可用作现场级剂量面积乘积计。 本文件的目的是： 1) 为剂量面积乘积计建立满足性能水平的要求； 2) 标准化确定符合此性能水平的方法。 规定了两种性能水平： – 适用于现场级剂量面积乘积计的低性能水平； – 适用于参考级剂量面积乘积计的高性能水平。 [外文原描述]： IEC 60580:2019 specifies the performance and testing of Dose Area Product Meters intended to measure Dose Area Product and/or Dose Area Product Rate to which the Patient is exposed during Medical Radiological Examinations. This document is applicable to the following types of Dose Area Product Meters: a) Field-Class Dose Area Product Meters normally used for the measurement of Dose Area Products during Medical Radiological Examinations; b) Reference-Class Dose Area Product Meters normally used for the Calibration of Field-Class Dosimeters. NOTE Reference-Class Dose Area Product Meters can be used as Field-Class Dose Area Product Meters. The object of this document is 1) to establish requirements for a satisfactory level of performance for Dose Area Product Meters, and 2) to standardize the methods for the determination of compliance with this level of performance. Two levels of performance are specified: – a lower level of performance applying to Field-Class Dose Area Product Meters; – a higher level of performance applying to Reference-Class Dose Area Product Meters. IEC 60580:2019 cancels and replaces the second edition published 2000, and constitutes a technical revision. This edition includes the following significant technical changes with respect to the previous edition: a) a second class of devices is introduced with tighter uncertainty tolerances; b) this document has been expanded to include detectors other than ionization chambers; c) radiation qualities have been updated to the new definitions according to IEC 61267; d) a requirement on the linearity of the dose area product rate measurement was added; e) changed chamber light transmission requirement from 70 % to 60 %.