Development of a portable digital radiographic system based on FOP-coupled CMOS image sensor and its performance evaluation

H. S. Cho; M. H. Jeong; B. S. Han; S. Kim; B. S. Lee; H. K. Kim; S. C. Lee

doi:10.1109/TNS.2005.856792

Development of a portable digital radiographic system based on FOP-coupled CMOS image sensor and its performance evaluation

H. S. Cho, M. H. Jeong, B. S. Han, S. Kim, B. S. Lee, H. K. Kim, S. C. Lee

Research output: Contribution to journal › Article › peer-review

11 Citations (Scopus)

Abstract

As a continuation of our digital X-ray imaging sensor R&D, we have developed a cost-effective, portable, digital radiographic system based on a CMOS image sensor coupled with a fiber optic plate (FOP) and selected conventional scintillators. The imaging system consists of a commercially available CMOS image sensor of 48 μm × 48 μm pixel size and 49.2 mm × 49.3 mm active area, a FOP bundled with several millions of glass fibers of about 6 μm in diameter and 3 mm in thickness, phosphor screens such as Min-R or Lanex series, a readout IC board, a GUI software, and a battery-operated X-ray generator (20-60 kV _p; up to 1 mA). Here the FOP was incorporated into the imaging system to reduce the performance degradation of the CMOS sensor module caused by irradiation and also to improve image quality. In this paper, we described each imaging component of the fully-integrated portable digital radiographic system in detail, and also presented its performance analysis with experimental measurements and acquired X-ray images in terms of system response with exposure, contrast-to-noise ratio (CNR), modulation transfer function (MTF), noise power spectrum (NPS), and detective quantum efficiency (DQE).

Original language	English
Pages (from-to)	1766-1772
Number of pages	7
Journal	IEEE Transactions on Nuclear Science
Volume	52
Issue number	5 III
DOIs	https://doi.org/10.1109/TNS.2005.856792
Publication status	Published - Oct 2005

Bibliographical note

Funding Information:
Manuscript received October 26, 2004. This work was supported by the Basic Atomic Energy Research Institute (BAERI) program of the Ministry of Science and Technology (MOST) under Contract M2-0376-03-0000. H. S. Cho and B. S. Han are with the Department of Radiological Science, Yonsei University, Wonju 220-71, Korea (e-mail: [email protected]; [email protected]). M. H. Jeong is with the Basic Atomic Energy Research Institute, Yonsei University, Wonju 220-710, Korea (e-mail: [email protected]). S. Kim is with the Department of Nuclear and Energy Engineering, Cheju National University, Cheju 690-756, Korea (e-mail: [email protected]). B. S. Lee is with the School of Biomedical Engineering, Konkuk University, Chungju 380-701, Korea (e-mail: [email protected]). H. K. Kim is with the School of Mechanical Engineering, Pusan National University, Pusan 609-735, Korea (e-mail: [email protected]). S. C. Lee is with the Department of Biomedical Engineering, Kyunghee University, Yongin 449-701, Korea (e-mail: [email protected]). Digital Object Identifier 10.1109/TNS.2005.856792

Keywords

CMOS image sensor
Digital radiography
Fiber optic plate with scintillator (FOS)
X-ray imaging

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10.1109/TNS.2005.856792

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abstract = "As a continuation of our digital X-ray imaging sensor R&D, we have developed a cost-effective, portable, digital radiographic system based on a CMOS image sensor coupled with a fiber optic plate (FOP) and selected conventional scintillators. The imaging system consists of a commercially available CMOS image sensor of 48 μm × 48 μm pixel size and 49.2 mm × 49.3 mm active area, a FOP bundled with several millions of glass fibers of about 6 μm in diameter and 3 mm in thickness, phosphor screens such as Min-R or Lanex series, a readout IC board, a GUI software, and a battery-operated X-ray generator (20-60 kV p; up to 1 mA). Here the FOP was incorporated into the imaging system to reduce the performance degradation of the CMOS sensor module caused by irradiation and also to improve image quality. In this paper, we described each imaging component of the fully-integrated portable digital radiographic system in detail, and also presented its performance analysis with experimental measurements and acquired X-ray images in terms of system response with exposure, contrast-to-noise ratio (CNR), modulation transfer function (MTF), noise power spectrum (NPS), and detective quantum efficiency (DQE).",

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note = "Funding Information: Manuscript received October 26, 2004. This work was supported by the Basic Atomic Energy Research Institute (BAERI) program of the Ministry of Science and Technology (MOST) under Contract M2-0376-03-0000. H. S. Cho and B. S. Han are with the Department of Radiological Science, Yonsei University, Wonju 220-71, Korea (e-mail: [email protected]; [email protected]). M. H. Jeong is with the Basic Atomic Energy Research Institute, Yonsei University, Wonju 220-710, Korea (e-mail: [email protected]). S. Kim is with the Department of Nuclear and Energy Engineering, Cheju National University, Cheju 690-756, Korea (e-mail: [email protected]). B. S. Lee is with the School of Biomedical Engineering, Konkuk University, Chungju 380-701, Korea (e-mail: [email protected]). H. K. Kim is with the School of Mechanical Engineering, Pusan National University, Pusan 609-735, Korea (e-mail: [email protected]). S. C. Lee is with the Department of Biomedical Engineering, Kyunghee University, Yongin 449-701, Korea (e-mail: [email protected]). Digital Object Identifier 10.1109/TNS.2005.856792",

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AU - Lee, B. S.

AU - Kim, H. K.

AU - Lee, S. C.

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Development of a portable digital radiographic system based on FOP-coupled CMOS image sensor and its performance evaluation

Abstract

Bibliographical note

Keywords

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