High resolution flat-panel X-ray detector for digital radiography

Author

Park, Ji-Koon ; Kang, Sang-Sik ; Cha, Byung-Youl ; Kim, Jin-Young ; Kim, So-Young ; Choi, Heung-Kook ; Nam, Sang-hee

Author_Institution

Dept. of Biomed. Eng., Inje Univ., Kimhae, South Korea

fYear

2005

fDate

23-25 June 2005

Firstpage

359

Lastpage

363

Abstract

In this paper, the evaluation of a selenium-based flat-panel digital X-ray detector is described. The prototype detector has a pixel pitch of 139 μm and a total active imaging area of 14 inches×8.5 inches, making up a total of 3.9 million pixels. Several quantitative parameters have been devised that correlate with the abilities of imaging devices to perform clinical tasks. The concepts of MTF, NPS, and DQE have been well described and are very useful descriptors of resolution, noise, and signal-to-noise ratio transfer ability. Such parameters (sensitivity, leakage current, MTF, NPS, DQE) were examined to evaluate the performance of this system. The sensitivity of 4.82 nC/mR/cm² was measured at 10 V/μm, while leakage current was measured at 270 pA/cm². The measured MTF at 2 lp/mm was 40%, and the DQE at 1.5 lp/mm was 16%.

Keywords

X-ray detection; diagnostic radiography; image resolution; leakage currents; selenium; MTF; Se; detective quantum efficiency; digital radiography; high resolution flat-panel X-ray detector; imaging devices; leakage current measurement; noise power spectrum; pixel pitch; selenium-based flat-panel digital X-ray detector; sensitivity measurement; signal-to-noise ratio transfer; Current measurement; High-resolution imaging; Leakage current; Optical imaging; Pixel; Prototypes; Radiography; Signal resolution; Signal to noise ratio; X-ray detectors;

fLanguage

English

Publisher

ieee

Conference_Titel

Enterprise networking and Computing in Healthcare Industry, 2005. HEALTHCOM 2005. Proceedings of 7th International Workshop on

Print_ISBN

0-7803-8940-9

Type

conf

DOI

10.1109/HEALTH.2005.1500481

Filename

1500481