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Coded aperture imaging using LYSO self-radiation scintillator detector.

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Title: Coded aperture imaging using LYSO self-radiation scintillator detector.
Authors: Lin, Zebin1 (AUTHOR) zeb_lin@ecut.edu.cn, Kang, Zechao2,3 (AUTHOR), Pan, Ziwen1,2,3 (AUTHOR) panzw19@ustc.edu.cn, Deng, Li4,5 (AUTHOR), Yu, Pei4,5 (AUTHOR), Chen, Liangwen4,5,6 (AUTHOR), Zou, Jijun1 (AUTHOR), Wan, Jiangfeng1 (AUTHOR), Zhang, Xiongjie1 (AUTHOR), Wu, Yiyuan1 (AUTHOR), Tang, Bin1 (AUTHOR), Ye, Bangjiao2,3 (AUTHOR)
Source: Radiation Measurements. Aug2026, Vol. 196, pN.PAG-N.PAG. 1p.
Subjects: Scintillators, Gamma rays, Scintillation counters, Radioactivity, Image quality analysis, Decoding algorithms, Diagnostic imaging
Abstract: In nuclear radiation imaging, SiPM-coupled scintillator detectors are widely used for coded aperture imaging. LYSO is a non-hygroscopic scintillator with high detection efficiency and ease of large-array fabrication, which shows potential for gamma-ray imaging. However, its intrinsic self-radiation can interfere with the effective counts of imaged gamma-rays, degrading imaging performance. In this work, a coded aperture imaging system using a SiPM-coupled LYSO detector was constructed, and an open-coding method was proposed to mitigate the effects of LYSO self-radiation, even when the detector cannot distinguish between the energies of imaged gamma rays and self-radiation peaks. Additionally, a no-reference image quality index for use in experimental imaging quality evaluation was introduced, and its effectiveness was demonstrated through its monotonic correlation with Contrast-to-Noise Ratio (CNR). • An imaging quality assessment method independent of source distribution is proposed. • The impact of detector self-radiation on coded aperture imaging is discussed. • A method is proposed to effectively reduce the impact of detector self-radiation on coded aperture imaging. [ABSTRACT FROM AUTHOR]
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Database: Engineering Source
Description
Abstract:In nuclear radiation imaging, SiPM-coupled scintillator detectors are widely used for coded aperture imaging. LYSO is a non-hygroscopic scintillator with high detection efficiency and ease of large-array fabrication, which shows potential for gamma-ray imaging. However, its intrinsic self-radiation can interfere with the effective counts of imaged gamma-rays, degrading imaging performance. In this work, a coded aperture imaging system using a SiPM-coupled LYSO detector was constructed, and an open-coding method was proposed to mitigate the effects of LYSO self-radiation, even when the detector cannot distinguish between the energies of imaged gamma rays and self-radiation peaks. Additionally, a no-reference image quality index for use in experimental imaging quality evaluation was introduced, and its effectiveness was demonstrated through its monotonic correlation with Contrast-to-Noise Ratio (CNR). • An imaging quality assessment method independent of source distribution is proposed. • The impact of detector self-radiation on coded aperture imaging is discussed. • A method is proposed to effectively reduce the impact of detector self-radiation on coded aperture imaging. [ABSTRACT FROM AUTHOR]
ISSN:13504487
DOI:10.1016/j.radmeas.2026.107718