YY/T 0894-2013 in English

本标准规定了井型电离室及配套测量组件(见第3章定义)的性能和某些结构要求,用于测定一个量,例如:对给定类型的源进行适当校准后,用于近距离放射治疗光子的辐射场中的空气比释动能率强度或参考空气比释动能率,或者光子和β辐射场中在某一深度处水吸收剂量。
本标准包括适于近距离放射治疗源的定量方法。该量可以是空气比释动能率强度或距源1m 处的参考空气比释动能率,或者在某一深度处(例如:2mm 或5mm)水吸收剂量。这些量的测量可通过
现有的各种井型电离室或系统实现。本标准适用于包括光子和β射线在内的预期用途为低剂量率、高剂量率、血管内近距离放射治疗测量的产品。本标准不适用于核医学应用的仪器。本标准的应用限于以井型电离室作为探测器的仪器。
仪器的用途是测量腔内(插入体腔)或组织间(插入人体组织)密封源的放射性输出量。
本标准的目的是:
a) 建立井型电离室系统满意性能的要求,和
b) 提供用于确定符合该性能的标准化方法。
本标准不涉及井型电离室系统的安全特性。本标准包括的井型电离室系统不用于患者环境。井型电离室系统的电气安全见IEC61010-1。静电计测量系统见IEC60731。

Scope

This standard specifies the performance and certain structural requirements for well-type ionization chambers and associated measuring components (see definition in Chapter 3) used to determine a quantity, e.g. for use at close range after appropriate calibration of a given type of source. The air kerma rate intensity or reference air kerma rate in the radiation field of radiotherapy photons, or the water absorbed dose at a certain depth in the photon and beta radiation fields. This standard covers quantitative methods suitable for brachytherapy sources. This quantity may be the air kerma intensity or a reference air kerma rate at 1 m from the source, or the water absorbed dose at a certain depth (e.g. 2 mm or 5 mm). Measurement of these quantities can be accomplished with a variety of well-type ionization chambers or systems currently available. This standard applies to products whose intended use is low dose rate, high dose rate, intravascular brachytherapy measurement, including photons and beta rays. This standard does not apply to instruments used in nuclear medicine. The application of this standard is limited to instruments using well-type ionization chambers as detectors. The purpose of the instrument is to measure the radioactive output of an intracavity (inserted into a body cavity) or interstitial (inserted into human tissue) sealed source. The purpose of this standard is: a) to establish requirements for satisfactory performance of well-type ionization chamber systems, and b) to provide a standardized method for determining compliance with that performance. This standard does not address the safety features of well ionization chamber systems. The well-type ionization chamber systems covered by this standard are not intended for use in patient environments. The electrical safety of well ionization chamber systems is specified in IEC 61010-1. Electrometer measurement systems see IEC 60731.