医用诊断X射线设备——特性测定用辐射条件

[中文适用范围]： IEC 61267:2025适用于那些在确定医用诊断X射线设备系统或部件特性时，需要明确X射线辐射条件的测试程序。本文件涉及用于生成X射线辐射条件的方法，这些方法通常用于测试实验室或制造设施中，以确定医用诊断X射线设备的特性。IEC 61267:2025取代并废止了2005年发布的第二版，本次修订为技术性修订。与前一版相比，本版包含以下重大技术变更：a) 删除附录C“实用峰值电压的测量”；b) 增加了信息性附录“每空气比释动能的信噪比平方（SNR2in）表”和规范性附录“用于乳腺X射线摄影的附加X射线辐射条件及其对应的标称铝半值层”；c) 修订X射线辐射条件；d) 新增用于验证X射线辐射条件的方法；e) 修改术语定义。 [外文原描述]： IEC 61267:2025 applies to test procedures which, for the determination of characteristics of systems or components of medical diagnostic X-ray equipment, require well-defined X-ray radiation conditions. This document deals with methods for generating X-ray radiation conditions which can be used under test conditions typically found in test laboratories or in manufacturing facilities for the determination of characteristics of medical diagnostic X-ray equipment. IEC 61267:2025 cancels and replaces the second edition published 2005. This edition constitutes a technical revision. This edition includes the following significant technical changes with respect to the previous edition: a) removing former Annex C “Measurement of the practical peak voltage”; b) inserting informative “Tabulated values for the squared signal-to-noise ratio per air kerma (SNR2in)” and normative “Additional X-ray radiation conditions as used in mammography and determination of the corresponding nominal aluminium half-value layers”; c) revision of X-ray radiation conditions; d) new method for verification of X-ray radiation conditions; e) change of term definitions.