牙科. 用于测定材料辐射不透明度的试验方法

[中文适用范围]： 本国际标准规定了通过参考铝标准样品测定测试材料的射线不透性的测试方法。 该方法旨在在临床有意义的水平上区分射线不透性，而不是考虑可能影响射线不透性的精确、固有值的因素，例如背景噪声、X射线束功率、灰度校正和图像增强。 人们认识到，这些因素可以改变射线不透性的值，但不能改变与内标（例如铝）的标准厚度相比的相对排名。 该测试可以利用牙科X射线设备的传统或数字传感技术来执行。 [外文原描述]： ISO 13116:2014 specifies test methods for determination of radio-opacity of a test material by reference to a specimen of an aluminium standard. The method is designed to discriminate radio-opacity at a clinically meaningful level and is not designed to take account of factors which may affect precise, inherent values of radio-opacity such as background noise, X-ray beam power, grey scale correction and image enhancement. It is recognized that such factors can change the value of radio-opacity but not the relative ranking compared to standard thicknesses of an internal standard such as aluminium. This test may be performed with conventional or digital sensoring techniques of dental X-ray apparatus.