간접평판형 검출기에서 변조전달함수 측정 시 Edge 각도에 따른 비교 연구

Comparison of Modulation Transfer Function in Measurements by Using Edge Device angle in Indirect Digital Radiography

This study was purpose to compare image quality of Indirect digital radiography (IDR) system by using the International electro-technical commission standard(IEC 62220-1) which were applied to IEC in medical imaging. To evaluation the analysis of Modulation transfer function(MTF) measurements edge device each angle by using edge method. In this study, Aero (Konica, Japan) which is Indirect flat panel detector(FPD) was used, the size of image receptor matrix 1994 × 2430 which performed 12bit processing and pixel pitch is 175 μm. In IEC standard method were applied to each angle were compared. The results of shown as LSF at 2.0° and 3.0° angeles. Shape is constant and shows smooth shape. The amount of data seemed reasonable and 2.19 cycles/mm and 2.01 cycles/mm at a spatial frequency of 2.0° and 3.0° at an MTF value of 0.1. At an MTF value of 0.5, the spatial frequencies were 2.0° and 1.11 cycles/mm and 0.93 cycles/mm at an angle of 3.0°. This study were to evaluate MTF by setting the each 2∼3° each angle and to suggest the quantitative methods of measuring by using IEC.