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Proceedings Paper

Development of a large-area CMOS-based detector for real-time x-ray imaging
Author(s): Sung Kyn Heo; Sung Kyu Park; Sung Ha Hwang; Dong Ak Im; Jari Kosonen; Tae Woo Kim; Seungman Yun; Ho Kyung Kim
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Paper 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.

Paper Details

Date Published: 23 March 2010
PDF: 10 pages
Proc. SPIE 7622, Medical Imaging 2010: Physics of Medical Imaging, 76223T (23 March 2010); doi: 10.1117/12.844582
Show Author Affiliations
Sung Kyn Heo, E-WOO Technology Co., Ltd. (Korea, Republic of)
Sung Kyu Park, E-WOO Technology Co., Ltd. (Korea, Republic of)
Sung Ha Hwang, E-WOO Technology Co., Ltd. (Korea, Republic of)
Dong Ak Im, E-WOO Technology Co., Ltd. (Korea, Republic of)
Jari Kosonen, E-WOO Technology Co., Ltd. (Korea, Republic of)
Tae Woo Kim, E-WOO Technology Co., Ltd. (Korea, Republic of)
Seungman Yun, Pusan National Univ. (Korea, Republic of)
Ho Kyung Kim, Pusan National Univ. (Korea, Republic of)


Published in SPIE Proceedings Vol. 7622:
Medical Imaging 2010: Physics of Medical Imaging
Ehsan Samei; Norbert J. Pelc, Editor(s)

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