A Rotating Scatter Mask for Inexpensive Gamma-Ray Imaging in Orphan Source Search: Simulation Results

FitzGerald, Jack

doi:10.1109/tns.2014.2379332

Cited by 14 publications

(7 citation statements)

References 16 publications

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“…However, typical dual-particle imaging systems are based on the Compton camera concept and coded aperture, which require position-sensitive radiation detectors [1][2][3]. One of recent advances in the radiation imaging system includes the development of a rotating scatter mask Hyun Suk Kim is with the Division of Radiation Regulation, Korea Institute of Nuclear Safety (KINS), Daejeon, Korea (RSM) system, which identifies the direction of the source with a single detector [4][5][6][7][8]. The system response is derived from primarily scattering events instead of full-energy absorption, as a function of time.…”

Section: Introductionmentioning

confidence: 99%

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Dual-Particle Imaging Performance of a Cs₂LiYCl₆:Ce (CLYC)-Based Rotational Modulation Collimator (RMC) System

Kim

2022

IEEE Trans. Nucl. Sci.

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A dual-particle imager based on a rotational modulation collimator (RMC) utilizing a Cs2LiYCl6:Ce (CLYC) scintillator was developed and investigated for its dual-particle imaging performance. Design considerations and previous simulation work were verified by conducting experiments, and experimental results showing neutron and gamma-ray imaging capabilities were obtained. The imaging performance of the CLYC-based RMC system was further evaluated by investigating it in a mixed neutron and gamma-ray environment, and dualparticle imaging capability of the RMC system was demonstrated. Signal-to-noise ratio values larger than 45 were achieved for reconstructed images of each neutron and gamma-ray source distribution, if modulation patterns were obtained with average fractional counting uncertainty of less than 3%. The structural similarity index of reconstructed images was calculated to be almost unity, indicating an artifact-free image.

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Section: Introductionmentioning

confidence: 99%

“…the system response) also changes accordingly. Early work on this technique by FitzGerald, and later by Egner et al demonstrated that RSM could be used in dual-particle environments [4,6].…”

Section: Introductionmentioning

confidence: 99%

Dual-Particle Imaging Performance of a Cs₂LiYCl₆:Ce (CLYC)-Based Rotational Modulation Collimator (RMC) System

Kim

2022

IEEE Trans. Nucl. Sci.

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“…A novel approach, similar in concept to the coded aperture system, exists that eliminates many of the alternative's limitations. This system utilizes a Low-Z mask placed over a single position-insensitive detector [6]. The system records energy spectra as a function of the geometrically varying mask, which is accomplished through a set, constant mask rotation.…”

Section: Introductionmentioning

confidence: 99%

“…The measured position dependent spectra, referred to as detector response curves (DRCs), depend on the source position and can be used to identify the source direction. FitzGerald's mask geometry [6] generates some DRCs that are nearly identical, which can lead to misidentification of the source direction. This work seeks to reduce the DRCs' linear dependence by optimizing the mask's geometry.…”

Section: Introductionmentioning

confidence: 99%

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Rotating scatter mask optimization for gamma source direction identification

Holland

Bevins

Burggraf

et al. 2018

Nuclear Instruments and Methods in Physics Research Section A:

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Rotating scattering masks have shown promise as an inexpensive, lightweight method with a large field-of-view for identifying the direction of a gamma emitting source or sources. However, further examination of the current rotating scattering mask design shows that changing the geometry may improve the identification by reducing or eliminating degenerate solutions and lower required count times. These changes should produce more linearly independent characteristics for the mask, resulting in a decrease in the mis-identification probability. Three approaches are introduced to generate alternative mask geometries. The eigenvector method uses a spring-mass system to create a geometry basis. The binary approach uses ones and zeros to represent the geometry with many possible combinations allowing for additional design flexibility. Finally, a Hadamard matrix is modified to examine a decoupled geometric solution. Four criteria are proposed for evaluating these methodologies. An analysis of the resulting detector response matrices demonstrates that these methodologies produced masks with superior identification characteristics than the original design. The eigenvector approach produces the least linearly dependent results, but exhibits a decrease in average efficiency. The binary results are more linearly dependent than the eigenvector approach, but this design achieves a higher average efficiency than original. The Hadamard-based method produced a lower maximum, but a higher average linear dependence than the original design. Further possible design enhancements are discussed.

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Multilabel proportion prediction and out-of-distribution detection on gamma spectra of short-lived fission products

Van Omen,

Morrow,

Scott

et al. 2024

Annals of Nuclear Energy

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A Rotating Scatter Mask for Inexpensive Gamma-Ray Imaging in Orphan Source Search: Simulation Results

Cited by 14 publications

References 16 publications

Dual-Particle Imaging Performance of a Cs₂LiYCl₆:Ce (CLYC)-Based Rotational Modulation Collimator (RMC) System

Dual-Particle Imaging Performance of a Cs₂LiYCl₆:Ce (CLYC)-Based Rotational Modulation Collimator (RMC) System

Rotating scatter mask optimization for gamma source direction identification

Multilabel proportion prediction and out-of-distribution detection on gamma spectra of short-lived fission products

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A Rotating Scatter Mask for Inexpensive Gamma-Ray Imaging in Orphan Source Search: Simulation Results

Cited by 14 publications

References 16 publications

Dual-Particle Imaging Performance of a Cs2LiYCl6:Ce (CLYC)-Based Rotational Modulation Collimator (RMC) System

Dual-Particle Imaging Performance of a Cs2LiYCl6:Ce (CLYC)-Based Rotational Modulation Collimator (RMC) System

Rotating scatter mask optimization for gamma source direction identification

Multilabel proportion prediction and out-of-distribution detection on gamma spectra of short-lived fission products

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Dual-Particle Imaging Performance of a Cs₂LiYCl₆:Ce (CLYC)-Based Rotational Modulation Collimator (RMC) System

Dual-Particle Imaging Performance of a Cs₂LiYCl₆:Ce (CLYC)-Based Rotational Modulation Collimator (RMC) System