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J Radiat Prot > Volume 24(3); 1999 > Article
Journal of Radiation Protection 1999;24(3):161-0.
비정질 실리콘 디지털 방사선 촬영기와 X-ray film과의 영상질 비교 평가
윤제웅;이형구;서태석;최보영;신경섭;문인기;김홍권;한용우;남승배;
Comparison of Image Quality of the Amorphous Silicon DR System and the Film-screen Systems
Youn, Je-Woong;Lee, Hyoung-Koo;Suh, Tae-Suk;Choe, Bo-Young;Shin, Kyung-Sub;Mun, In-K.;Kim, Hong-Kwon;Han, Yong-Woo;Nam, Seung-Bae;
ABSTRACT
System performances in terms of image quality between an amorphous silicon DR system and a conventional film-screen system were evaluated. Various aspects of image quality MTF (modulation transfer function), NPS (noise power spectrum), SNR(signal-to-noise ratio) and contrast were measured and calculated. The MTF of the DR system was comparable to the film-screen systems. The noise was mainly dominated by the quantum mottle in both systems and the electronic noise was found in the DR system. The contrast of the DR system was better than the film-screen systems by virtue of high sensitivity and image processing. Compared to the film-screen systems in general radiography, the DR system had similar resolution and showed better contrast with the same exposure condition after contrast manipulation. The results of this study provide some useful information about the performance of the DR system in connection with medical applications.
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