ISO/ASTM 51650:2013是一种使用三醋酸纤维素（CTA）剂量测定系统测量光子或电子辐照材料的吸收剂量（以对水的吸收剂量为准）的规程。CTA剂量测定系统被归类为常规剂量测定系统。 根据影响量对其响应的复杂影响，CTA剂量计被归类为II型剂量计。 ISO/ASTM 51650:2013是一套标准之一，该标准提供了在辐射处理中正确实施剂量测定的建议，并描述了实现符合ASTM E2628中CTA剂量测定系统要求的方法。 本标准将与ASTM E2628一起阅读。

ISO/ASTM 51650:2013 is a practice for using a cellulose triacetate (CTA) dosimetry system to measure absorbed dose in materials irradiated by photons or electrons in terms of absorbed dose to water. The CTA dosimetry system is classified as a routine dosimetry system. The CTA dosimeter is classified as a type II dosimeter on the basis of the complex effect of influence quantities on its response. ISO/ASTM 51650:2013 is one of a set of standards that provides recommendations for properly implementing dosimetry in radiation processing, and describes a means of achieving compliance with the requirements of ASTM E2628 for a CTA dosimetry system. It is intended to be read in conjunction with ASTM E2628.