Template matching method for γ-ray localization based on coded aperture imaging

Yuying Yin; Xiaopeng Zhou; Lisheng Geng

doi:10.1007/s41605-025-00531-x

Template matching method for γ-ray localization based on coded aperture imaging

Yuying Yin
, Xiaopeng Zhou^*
, Lisheng Geng^*

^*Corresponding author for this work

Beihang University
CAS - Institute of Modern Physics

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

Abstract

Purpose: Gamma cameras based on coded aperture imaging are widely used to locate and identify radiation sources. The imaging quality is tightly related to the accuracy of γ-ray interaction location determining the projection data. Methods: We used the template matching (TM) method, combining the light response function to rebuild the interaction positions. Array and monolithic crystal detectors were employed in this study. We calculated the standard deviation of the reconstructed projection data and the reconstructed point source image’s contrast noise ratio (CNR) values for 60–1460 keV γ-rays. Results: 0.3-mm resolution was achieved for 60 keV γ-rays with simulation data. Compared to the classical center of gravity (CoG) method, the TM performs much better for both imaging systems with better noise immunity and energy extraction ability, achieving high reconstruction accuracy.

Original language	English
Pages (from-to)	521-532
Number of pages	12
Journal	Radiation Detection Technology and Methods
Volume	9
Issue number	3
DOIs	https://doi.org/10.1007/s41605-025-00531-x
State	Published - Sep 2025

Keywords

Coded aperture imaging
Gamma
Geant4
Radiation detection

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10.1007/s41605-025-00531-x

Cite this

@article{6a3daec362f1432385d19da871bf1609,

title = "Template matching method for γ-ray localization based on coded aperture imaging",

abstract = "Purpose: Gamma cameras based on coded aperture imaging are widely used to locate and identify radiation sources. The imaging quality is tightly related to the accuracy of γ-ray interaction location determining the projection data. Methods: We used the template matching (TM) method, combining the light response function to rebuild the interaction positions. Array and monolithic crystal detectors were employed in this study. We calculated the standard deviation of the reconstructed projection data and the reconstructed point source image{\textquoteright}s contrast noise ratio (CNR) values for 60–1460 keV γ-rays. Results: 0.3-mm resolution was achieved for 60 keV γ-rays with simulation data. Compared to the classical center of gravity (CoG) method, the TM performs much better for both imaging systems with better noise immunity and energy extraction ability, achieving high reconstruction accuracy.",

keywords = "Coded aperture imaging, Gamma, Geant4, Radiation detection",

author = "Yuying Yin and Xiaopeng Zhou and Lisheng Geng",

note = "Publisher Copyright: {\textcopyright} Institute of High Energy Physics, Chinese Academy of Sciences 2025.",

year = "2025",

month = sep,

doi = "10.1007/s41605-025-00531-x",

language = "英语",

volume = "9",

pages = "521--532",

journal = "Radiation Detection Technology and Methods",

issn = "2509-9930",

publisher = "Springer Singapore",

number = "3",

}

TY - JOUR

T1 - Template matching method for γ-ray localization based on coded aperture imaging

AU - Yin, Yuying

AU - Zhou, Xiaopeng

AU - Geng, Lisheng

N1 - Publisher Copyright: © Institute of High Energy Physics, Chinese Academy of Sciences 2025.

PY - 2025/9

Y1 - 2025/9

N2 - Purpose: Gamma cameras based on coded aperture imaging are widely used to locate and identify radiation sources. The imaging quality is tightly related to the accuracy of γ-ray interaction location determining the projection data. Methods: We used the template matching (TM) method, combining the light response function to rebuild the interaction positions. Array and monolithic crystal detectors were employed in this study. We calculated the standard deviation of the reconstructed projection data and the reconstructed point source image’s contrast noise ratio (CNR) values for 60–1460 keV γ-rays. Results: 0.3-mm resolution was achieved for 60 keV γ-rays with simulation data. Compared to the classical center of gravity (CoG) method, the TM performs much better for both imaging systems with better noise immunity and energy extraction ability, achieving high reconstruction accuracy.

AB - Purpose: Gamma cameras based on coded aperture imaging are widely used to locate and identify radiation sources. The imaging quality is tightly related to the accuracy of γ-ray interaction location determining the projection data. Methods: We used the template matching (TM) method, combining the light response function to rebuild the interaction positions. Array and monolithic crystal detectors were employed in this study. We calculated the standard deviation of the reconstructed projection data and the reconstructed point source image’s contrast noise ratio (CNR) values for 60–1460 keV γ-rays. Results: 0.3-mm resolution was achieved for 60 keV γ-rays with simulation data. Compared to the classical center of gravity (CoG) method, the TM performs much better for both imaging systems with better noise immunity and energy extraction ability, achieving high reconstruction accuracy.

KW - Coded aperture imaging

KW - Gamma

KW - Geant4

KW - Radiation detection

UR - https://www.scopus.com/pages/publications/85217646567

U2 - 10.1007/s41605-025-00531-x

DO - 10.1007/s41605-025-00531-x

M3 - 文章

AN - SCOPUS:85217646567

SN - 2509-9930

VL - 9

SP - 521

EP - 532

JO - Radiation Detection Technology and Methods

JF - Radiation Detection Technology and Methods

IS - 3

ER -

Template matching method for γ-ray localization based on coded aperture imaging

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Keywords

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