Development of a selenium-based flat-panel detector for real-time radiography and fluoroscopy

Akira Tsukamoto; Shinichi Yamada; Takayuki Tomisaki; Manabu Tanaka; Takuya Sakaguchi; Hiroshi Asahina; Masayuki Nishiki

doi:10.1117/12.317039

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24 July 1998 Development of a selenium-based flat-panel detector for real-time radiography and fluoroscopy

Akira Tsukamoto, Shinichi Yamada, Takayuki Tomisaki, Manabu Tanaka, Takuya Sakaguchi, Hiroshi Asahina, Masayuki Nishiki

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Proceedings Volume 3336, Medical Imaging 1998: Physics of Medical Imaging; (1998) https://doi.org/10.1117/12.317039
Event: Medical Imaging '98, 1998, San Diego, CA, United States

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.

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Akira Tsukamoto, Shinichi Yamada, Takayuki Tomisaki, Manabu Tanaka, Takuya Sakaguchi, Hiroshi Asahina, and Masayuki Nishiki "Development of a selenium-based flat-panel detector for real-time radiography and fluoroscopy", Proc. SPIE 3336, Medical Imaging 1998: Physics of Medical Imaging, (24 July 1998); https://doi.org/10.1117/12.317039

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