International Electrotechnical Commission (IEC) established the framework for the use of exposure index (EI) for evaluating the exposure conditions with various digital systems. In this study, we investigated the feasibility of EI, as per the IEC, by comparing the EIs obtained through manual calculated and that displayed on the console of two computed radiography (CR) and digital radiography (DR) systems with radiation beam qualities of RQA3,5,7 and 9. As a result, both two systems indicated an uncertainty of less than 20% for both calculated and displayed EI with all beam qualities except displayed EI obtained by RQA3. However, the displayed EI values were different even under the same exposure conditions because of the characteristics of the imaging receptor materials, such as BaFI or CsI, of two systems. Therefore, when an operator attempts to introduce displayed EI for managing radiation dose, it is essential to understand the characteristics of the digital system.

中文翻译：

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IEC标准框架中显示的曝光指数作为数字射线照相系统剂量优化工具的可行性。

国际电工委员会（IEC）建立了使用曝光指数（EI）评估各种数字系统的曝光条件的框架。在这项研究中，我们通过比较通过人工计算获得的EI和在两个具有RQA3辐射质量的计算机射线照相（CR）和数字射线照相（DR）系统的控制台上显示的EI进行比较，研究了根据IEC的EI的可行性。 ，5、7和9。结果，两个系统都显示出，除了通过RQA3获得的显示EI以外，所有光束质量的计算和显示EI的不确定度均小于20％。但是，由于两个系统的成像受体材料（例如BaFI或CsI）的特性，即使在相同的曝光条件下，显示的EI值也不同。因此，