IEC TR 61948-4:20 19 RLV包含IEC官方国际标准及其红线版本。Redline版本不是官方文档，它只有英文版本，为您提供了一种快速简单的方法来比较IEC官方标准与其以前版本之间的所有变化。 IEC TR 61948-4:20 19涵盖了核医学中使用的放射性核素校准器的常规测试。这种装置利用阱型的电离室和以活性为单位的直接读出。IEC 61303中描述了确定性能参数的要求和具体方法。这些方法主要用于验收测试。IEC TR 61948-4:20 19取消并取代了2006年发布的第一版。本版构成技术修订版。与上一版相比，此版本包含以下重大技术变更:确定系统线性的测试方法已经更新，以反映放射性核素校准器的技术发展。

IEC TR 61948-4:2019 RLV contains both the official IEC International Standard and its Redline version. The Redline version is not an official document, it is available in English only and provides you with a quick and easy way to compare all the changes between the official IEC Standard and its previous edition.

IEC TR 61948-4:2019 covers the routine testing of radionuclide calibrators used in nuclear medicine. Such devices utilise ionisation chambers of the well type and a direct readout in units of activity. Requirements and specific methods to determine performance parameters are described in IEC 61303. These methods are primarily designed for acceptance testing. IEC TR 61948-4:2019 cancels and replaces the first edition published in 2006. This edition constitutes a technical revision. This edition includes the following significant technical change with respect to the previous edition: the test method to determine system linearity has been updated to reflect the technical developments of radionuclide calibrators.