防医疗诊断用X射线的防护装置. 第2部分: 半透明防护板

[中文适用范围]： IEC 61331 的这一部分适用于 X 射线诊断和 X 射线治疗中用于辐射防护的半透明防护板。它还适用于核医学和带有自动控制后装设备的近距离治疗中用于防护伽玛辐射的半透明防护板。它不包括其他半透明辐射防护材料@，例如 - 用于保护操作者眼睛的含铅眼镜或护目镜（眼镜）@ - 覆盖操作者整个面部的含铅面罩@ - 患者眼睛保护@和 - 甲状腺颈部保护装置。第 2 部分涉及以下要求： - 几何精度； - 材料的光学质量； - 光谱透射率； - 辐射衰减特性； - 标记； - 符合本标准的声明。 [外文原描述]： IEC 61331-2:2014 applies to translucent protective plates used for radiation protection in X-ray diagnosis and in X-ray therapy. It also applies to translucent protective plates used for protection against gamma radiation in nuclear medicine and brachytherapy with automatically-controlled afterloading equipment. It does not cover other translucent radiation protection materials, e.g. leaded glasses or goggles for protection of the operator's eyes (eye spectacles); leaded face shields, which cover the entire face of the operator; patient eye protection; and thyroid/neck protective devices. This Part 2 deals with the requirements on: - geometrical accuracy; - optical quality of the material; - spectral transmittance; - radiation attenuation properties; - marking; and - statement of compliance with this standard. This second edition cancels and replaces the first edition of IEC 61331-2, published in 1994. It constitutes a technical revision. This second edition has been adapted to apply to the present technology. The essential changes and extensions are: - extension of scope to cover all kinds of translucent protective plates and all kinds of radiation qualities and gamma radiation; - removal of definition and requirements for translucent protective plates for visual imaging; - changes of requirements concerning geometrical accuracy and optical quality; - changes of requirements concerning determination of lead equivalent and minimal thickness; and - changes of requirements concerning information and marking.