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Proceedings Paper

Development of a selenium-based flat-panel detector for real-time radiography and fluoroscopy
Author(s): Akira Tsukamoto; Shinichi Yamada; Takayuki Tomisaki; Manabu Tanaka; Takuya Sakaguchi; Hiroshi Asahina; Masayuki Nishiki
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Paper Abstract

Flat-panel detector (FPD) is the driving force for realizing the next generation of x-ray systems. The purpose of this study was to develop a selenium-based FPD for both radiography and fluoroscopy. The detector uses amorphous selenium (a-Se) and a thin-film transistor (TFT) array. The simple construction of the a-Se layer permits real-time readout. The unique response characteristics of the FPD, which can be saturated over permitted x-ray doses, are provided by the TFT structure. Our prototype FPD was designed to acquire images at 30 frames per second (fps). A high modulation transfer factor was obtained: 0.63 at 2.0 Lp/mm. Sequential fluoroscopic images were acquired at up to 30 fps. The linear characteristics of the detector covered the commonly employed range of clinical exposure dose. Less than 1.5% image lag was measured at 30 fps.

Paper Details

Date Published: 24 July 1998
PDF: 8 pages
Proc. SPIE 3336, Medical Imaging 1998: Physics of Medical Imaging, (24 July 1998); doi: 10.1117/12.317039
Show Author Affiliations
Akira Tsukamoto, Toshiba Medical Engineering Lab. (Japan)
Shinichi Yamada, Toshiba Medical Engineering Lab. (Japan)
Takayuki Tomisaki, Toshiba Medical Engineering Lab. (Japan)
Manabu Tanaka, Toshiba Medical Engineering Lab. (Japan)
Takuya Sakaguchi, Toshiba Medical Engineering Lab. (Japan)
Hiroshi Asahina, Toshiba Medical Engineering Lab. (Japan)
Masayuki Nishiki, Toshiba Nasu Works (Japan)


Published in SPIE Proceedings Vol. 3336:
Medical Imaging 1998: Physics of Medical Imaging
James T. Dobbins III; John M. Boone, Editor(s)

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