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24 July 1998 Development of a selenium-based flat-panel detector for real-time radiography and fluoroscopy
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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.
© (1998) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
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);

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