IEC 규정 노출지수를 활용한 디지털 방사선 영상시스템에서의 영상 수용체간 특성평가 (Ⅰ)

Abstract

The International Electrotechnical Commission (IEC) has regulated the definition and requirements of the exposure index (EI). In this study, we calculated the EI of several image receptors in digital radiography system of two different manufacturers according to the method as per IEC, and evaluated the relationship with incident air kerma. To calculate t he E I, w e obtained the characteristics curve of e ach i mage receptor b y increasing t he i ncident air kerma at R QA 3, 5, 7 and 9, respectively. As a result, there was no significant difference in the EI values between different image receptors of the same manufacturer, but EI values of different manufacturer was different despite the same air kerma was incident. Therefore, understanding the characteristics of the digital radiography systems is important in order to use EI as a tool for measuring and managing the radiation dose.