Development of a large-area CMOS-based detector for real-time x-ray imaging

Sung Kyn Heo; Sung Kyu Park; Sung Ha Hwang; Dong Ak Im; Jari Kosonen; Tae Woo Kim; Seungman Yun; Ho Kyung Kim

doi:10.1117/12.844582

22 March 2010 Development of a large-area CMOS-based detector for real-time x-ray imaging

Sung Kyn Heo, Sung Kyu Park, Sung Ha Hwang, Dong Ak Im, Jari Kosonen, Tae Woo Kim, Seungman Yun, Ho Kyung Kim

Proceedings Volume 7622, Medical Imaging 2010: Physics of Medical Imaging; 76223T (2010) https://doi.org/10.1117/12.844582
Event: SPIE Medical Imaging, 2010, San Diego, California, United States

Abstract

Complementary metal-oxide-semiconductor (CMOS) active pixel sensors (APSs) with high electrical and optical performances are now being attractive for digital radiography (DR) and dental cone-beam computed tomography (CBCT). In this study, we report our prototype CMOS-based detectors capable of real-time imaging. The field-of-view of the detector is 12 × 14.4 cm. The detector employs a CsI:Tl scintillator as an x-ray-to-light converter. The electrical performance of the CMOS APS, such as readout noise and full-well capacity, was evaluated. The x-ray imaging characteristics of the detector were evaluated in terms of characteristic curve, pre-sampling modulation transfer function, noise power spectrum, detective quantum efficiency, and image lag. The overall performance of the detector is demonstrated with phantom images obtained for DR and CBCT applications. The detailed development description and measurement results are addressed. With the results, we suggest that the prototype CMOS-based detector has the potential for CBCT and real-time x-ray imaging applications.

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Sung Kyn Heo, Sung Kyu Park, Sung Ha Hwang, Dong Ak Im, Jari Kosonen, Tae Woo Kim, Seungman Yun, and Ho Kyung Kim "Development of a large-area CMOS-based detector for real-time x-ray imaging", Proc. SPIE 7622, Medical Imaging 2010: Physics of Medical Imaging, 76223T (22 March 2010); https://doi.org/10.1117/12.844582

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