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논문 기본 정보
- 자료유형
- 학술저널
- 저자정보
- 발행연도
- 2021.4
- 수록면
- 1,266 - 1,276 (11page)
- DOI
- https://doi.org/10.1016/j.net.2020.09.012
이용수
초록· 키워드
오류제보하기
The mask parameters of a coded aperture are critical design features when optimizing the performanceof a gamma-ray camera. In this paper, experiments and Monte Carlo simulations were performed toderive the minimum detectable activity (MDA) when one seeks a real-time imaging capability. First, theimpact of the thickness of the modified uniformly redundant array (MURA) mask on the image quality isquantified, and the imaging of point, line, and surface radiation sources is demonstrated using bothcross-correlation (CC) and maximum likelihood expectation maximization (MLEM) methods. Second, theminimum detectable activity is also derived for real-time imaging by altering the factors used in theimage quality assessment, consisting of the peak-to-noise ratio (PSNR), the normalized mean squareerror (NMSE), the spatial resolution (full width at half maximum; FWHM), and the structural similarity(SSIM), all evaluated as a function of energy and mask thickness. Sufficiently sharp images werereconstructed when the mask thickness was approximately 2 cm for a source energy between 30 keVand 1.5 MeV and the minimum detectable activity for real-time imaging was 23.7 MBq at 1 m distancefor a 1 s collection time.
목차
등록된 정보가 없습니다.
참고문헌 (17)
참고문헌 신청
하정철 / 2016 / 후쿠시마 원전사고 및 방사능 오염에 대한 인식조사 / 방사선방어학회지 41(1):7~14
K. Weinfurther / 2018 / Model-based design evaluation of a compact, high-efficiency neutron scatter camera / Nucl. Instrum. Methods Phys. Res. Sect. A Accel. Spectrom. Detect. Assoc. Equip 883:115~135
T. M. Cannon / 1980 / Coded aperture imaging : many holes make light work / Opt. Eng 19(3):283~289
Manhee Jeong / 2020 / Comparison of gamma ray localization using system matrixes obtained by either MCNP simulations or ray-driven calculations for a coded-aperture imaging system / Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment 954:161353
R. Accorsi / 2001 / Design of a Near-Field Coded Aperture Cameras for High Resolution Medical and Industrial Gamma-Ray Imaging
K. Weinfurther / 2018 / Model-based design evaluation of a compact, high-efficiency neutron scatter camera / Nucl. Instrum. Methods Phys. Res. Sect. A Accel. Spectrom. Detect. Assoc. Equip 883:115~135
T. M. Cannon / 1980 / Coded aperture imaging : many holes make light work / Opt. Eng 19(3):283~289
Manhee Jeong / 2020 / Comparison of gamma ray localization using system matrixes obtained by either MCNP simulations or ray-driven calculations for a coded-aperture imaging system / Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment 954:161353
R. Accorsi / 2001 / Design of a Near-Field Coded Aperture Cameras for High Resolution Medical and Industrial Gamma-Ray Imaging
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