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Proceedings Paper

Progress report on the performance of real-time selenium flat-panel detectors for direct x-ray imaging
Author(s): Olivier Tousignant; Martin Choquette; Yves Demers; Luc Laperriere; Jonathan Leboeuf; Michitaka Honda; Masayuki Nishiki; Akihito Takahashi; Akira Tsukamoto
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Paper Abstract

Real time flat panel detectors based on amorphous selenium (a-Se) have demonstrated to be the most advanced technology for direct conversion X-ray imaging in various medical applications. In continuation of real time detector development, ANRAD Corporation introduce in this paper a large size 14 inches X 14 inches active area detector built with an amorphous selenium (a-Se) converter coated on a TFT array. This new detector is a scaled up version of the 9 inches X 9 inches presented last year based on a TFT array with 150 um x 150 um pixel and a 1000 mm thick a-Se PIN structure operated at 10V/um. DQE(f=0) measurements were performed in low dose range and demonstrated to be in agreement with a linear model including 2500e of electronic noise. It is also shown that the spatial resolution (MTF) could be controlled by selenium coating process and can almost reach the theoretical limit defined by the pixel pitch. Finally, the first 14 inches X 14 inches chest image is presented.

Paper Details

Date Published: 3 May 2002
PDF: 8 pages
Proc. SPIE 4682, Medical Imaging 2002: Physics of Medical Imaging, (3 May 2002); doi: 10.1117/12.465594
Show Author Affiliations
Olivier Tousignant, ANRAD Corp. (Canada)
Martin Choquette, ANRAD Corp. (Canada)
Yves Demers, ANRAD Corp. (Canada)
Luc Laperriere, ANRAD Corp. (Canada)
Jonathan Leboeuf, ANRAD Corp. (Canada)
Michitaka Honda, Toshiba Corp. (Japan)
Masayuki Nishiki, Toshiba Corp. (Japan)
Akihito Takahashi, Toshiba Corp. (Japan)
Akira Tsukamoto, Toshiba Corp. (Japan)


Published in SPIE Proceedings Vol. 4682:
Medical Imaging 2002: Physics of Medical Imaging
Larry E. Antonuk; Martin Joel Yaffe, Editor(s)

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