医用电气设备.近距放射疗法用剂量测定仪器.第1部分:安装在井型电离室的器械

[中文适用范围]： 范围和目标 IEC 62467 的这一部分规定了第 3 条@中定义的井型电离室和相关测量装置@的性能和一些相关结构要求，用于确定空气比释动能强度或参考空气比释动能等量@对给定类型的源进行适当校准后，近距离治疗@中使用的光子辐射场中的光子辐射场速率或水中一定深度@处的吸收剂量。本国际标准涵盖了适合于所考虑的近距离治疗源的数量量化技术。该量可以是1 m 处的空气比释动能强度或参考空气比释动能速率或一定深度（例如2 毫米或5 毫米）处的水吸收剂量。这些量的测量可以通过当前可用于此目的的各种井型电离室或系统来完成。本标准适用于低剂量率@高剂量率@血管内@光子和β@近距离治疗测量的产品。它不适用于核医学应用的仪器。该标准的应用仅限于采用 WELLTYPE 电离室作为检测器的仪器。预期用途是测量腔内（插入体腔）或间质（插入身体组织）应用的放射性@封装源的输出。本标准的目的是：a) 为井型腔室系统@建立令人满意的性能水平的要求；b) 标准化确定是否符合该性能水平的方法。本标准不涉及井型腔室系统的安全方面。本标准涵盖的 WELL-TYPE 腔室系统不适用于患者环境。 IEC 61010-1 涵盖了 WELL-TYPE CHAMBER SYSTEMS 的电气安全。 IEC 60731 涵盖了静电计测量系统的操作。 [外文原描述]： IEC 62467-1:2009 specifies the performance and some related constructional requirements of well-type ionization chambers and associated measurement apparatus, intended for the determination of a quantity, such as air kerma strength or reference air kerma rate in photon radiation fields or absorbed dose to water at a depth, in photon and beta radiation fields used in brachytherapy, after appropriate calibration for a given type of source. IEC 62467-1:2009 covers the techniques for the quantification of the quantity appropriate for the brachytherapy source under consideration. This quantity may be air kerma strength or reference air kerma rate at 1 m, or absorbed dose to water at a depth (e.g. 2 mm or 5 mm). Measurement of these quantities may be accomplished by a variety of well-type ionization chambers or systems currently available for this purpose. This standard applies to products intended for low dose rate, high dose rate, intravascular, both photon and beta, brachytherapy measurements. It does not apply to instruments for nuclear medicine applications. The application of the standard is limited to instruments that incorporate well-type ionization chambers as detectors. The intended use is the measurement of the output of radioactive, encapsulated sources for intracavitary (insertion into body cavities) or interstitial (insertion into body tissue) applications. The object of IEC 62467-1:2009 is a) to establish requirements for a satisfactory level of performance for well-type chamber systems, and b) to standardize the methods for the determination of compliance with this level of performance. IEC 62467-1:2009 is not concerned with the safety aspects of well-type chamber systems. The well-type chamber systems covered by this standard are not intended for use in patient environment. The electrical safety of well-type chamber systems is covered in IEC 61010-1. The operation of the electrometer measuring system is covered in IEC 60731.