Proceedings of the KOSOMBE Conference (대한의용생체공학회:학술대회논문집)
- Volume 1998 Issue 11
- /
- Pages.295-296
- /
- 1998
The study for electric readout of X-ray signal using MOSFET
MOSFET를 이용한 X선 신호의 전기적 획득에 관한 연구
- Park, S.K. (Department of Biomedical Engineering, College of Health Science, Inje University) ;
- Kang, Y.S. (Department of Biomedical Engineering, College of Health Science, Inje University) ;
- Seo, J.H. (Department of Biomedical Engineering, College of Health Science, Inje University) ;
- Park, J.K. (Department of Biomedical Engineering, College of Health Science, Inje University) ;
-
Nam, S.H.
(Department of Biomedical Engineering, College of Health Science, Inje University)
- 박성광 (인제대학교 보건대학 의용공학과) ;
- 강영수 (인제대학교 보건대학 의용공학과) ;
- 서지현 (인제대학교 보건대학 의용공학과) ;
- 박지군 (인제대학교 보건대학 의용공학과) ;
-
남상희
(인제대학교 보건대학 의용공학과)
- Published : 1998.11.20
Abstract
With xeroradiography appearance, DR (Digital Radiography) system have been studying for X-ray detection using photoreceptor. Also detection method for receptor charge change have been developing variably. We use photoreceptor material of a-Se(Amorphous Selenium) with high DQE, high SNR(Signal to Noise Ratio) and high transformation efficiency of X-ray signals into electrical signals. After a-Se receptor is uniformly charged by using Arc discharge, X-ray is exposed. Then a-Se receptor produce subtle charge variation and MOSFET detect charge variations. The detected signal pass A/D converter and signal processing by PC. As results, the initial voltage is 8V. It has wide dynamic range needed digital radiography system. In this study, we obtained data with changing kVp(tube potential voltage) and fixed 8mAs(tube current by exposure time) in X-ray system. However MOSFET detector for X-ray signal is not tested X-ray mAs variations. But if MOSFET detector is tested X-ray mAs variation and exactly calibrated multichannel is made and noise-reduction is done, suitable DR system readout method will be done.
Keywords