DOI correction for gamma ray energy reconstruction based on energy segment in 3D position-sensitive CdZnTe detectors

Li, Y.; Gong, Pin; Tang, Xiaobin; Hu, Zengrong; Wang, P.; Tian, Feng; Wu, Sen; Ye, M.; Zhou, Chungen; Zhu, Xiaoxiang

doi:10.1088/1748-0221/17/03/t03004

Cited by 8 publications

(2 citation statements)

References 28 publications

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“…At the same time, the precision of accuracy is found through the performance of the models in key parameter indicators (KPI). In the case of DOI, such KPI can be the extent of improvement of DTR with the application of relevant time-walk corrections [7], or that of energy resolution [21], given that the causal relation between DOI accuracy and DTR or energy resolution is well established.…”

Section: F Nn Applicationmentioning

confidence: 99%

Semi-Monolithic Meta-Scintillator Simulation Proof-of-Concept, Combining Accurate DOI and TOF

Konstantinou,

Zhang,

Bonifacio

et al. 2024

IEEE Trans. Radiat. Plasma Med. Sci.

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Metascintllators arrangements have shown to achieve an equivalent CTR of 200 ps for BGO-plastic and 140 ps for LYSO-plastic sets. In this paper, we examine a novel architecture: The idea is to slice a slow scintillator (BGO or LYSO) into thin slabs read out by an array of SiPM in the semimonolithic manner providing depth-of-interaction (DOI) information; and interleave them with thin segmented fast scintillators (plastic EJ232 or EJ232Q) read out by single SiPMs as in pixelated designs, providing pixelated level coincidence time resolution (CTR), in what we call a semi-monolithic meta-scintillator (SMMS). We thus combine layers of slow scintillator of dimension 0.3x25.5x(15 or 24) mm 3 and layers of fast scintillator of dimensions 0.1x3.1x(15 or 24) mm 3 in a Monte Carlo Gate platform to investigate the performance of this new type of semimonolithic detector. It is shown that the time resolution of SMMS is equivalent to that of single metapixels of the same configuration. In particular, 15 mm deep LYSO based SMMS led to CTR 121 ps, before implementation of timewalk correction (107 ps CTR). Same dimensions for BGO based SMMS led to CTR of 241 ps, a 15% deviation from metapixel experimental results. Further to this timing study, we expand the study to application of neural networks on the photon distributions and timestamps recorded at the SiPM array. This leads to determination of the DOI with < 3mm precision and 0.85 confidence level in the best scenario and more than 2 standard deviations precision in reconstructing energy sharing and energy of interactions. Overall, neural network prediction capabilities, taking advantage of enhanced understanding of the photon distribution, exceed those of the standard energy calculation through addition of numbers of detected photons or any analytic approach on energy sharing.

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Section: F Nn Applicationmentioning

confidence: 99%

Semi-Monolithic Meta-Scintillator Simulation Proof-of-Concept, Combining Accurate DOI and TOF

Konstantinou,

Zhang,

Bonifacio

et al. 2024

IEEE Trans. Radiat. Plasma Med. Sci.

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“…Therefore, the calibration of detectors using the Depth of Interaction correction technique plays a crucial role in improving the energy resolution of γ-ray detectors. Li [134] from Nanjing University of Aeronautics and Astronautics conducted research on existing DOI correction methods and proposed an improved energycorrection algorithm. The experimental study discussed DOI correction factors for CZT detectors at various energy levels.…”

Section: Research On the Spatial Resolution Of Array Detectorsmentioning

confidence: 99%

Research on the Technological Progress of CZT Array Detectors

Li,

Cheng,

Liu

et al. 2024

Sensors

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CdZnTe (CZT) is a new type of compound semiconductor that has emerged in recent years. Compared to other semiconductor materials, it possesses an ideal bandgap, high density, and high electron mobility, rendering it an excellent room-temperature composite semiconductor material for X-ray and γ-ray detectors. Due to the exceptional performance of CZT material, detectors manufactured using it exhibit high energy resolution, spatial resolution, and detection efficiency. They also have the advantage of operating at room temperature. CZT array detectors, furthermore, demonstrate outstanding spatial detection and three-dimensional imaging capabilities. Researchers worldwide have conducted extensive studies on this subject. This paper, building upon this foundation, provides a comprehensive analysis of CZT crystals and CZT array detectors and summarizes existing research to offer valuable insights for envisioning new detector methodologies.

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GPU-accelerated three-dimensional reconstruction method of the Compton camera and its application in radionuclide imaging

Geng

Tian

et al. 2023

NUCL SCI TECH

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DOI correction for gamma ray energy reconstruction based on energy segment in 3D position-sensitive CdZnTe detectors

Cited by 8 publications

References 28 publications

Semi-Monolithic Meta-Scintillator Simulation Proof-of-Concept, Combining Accurate DOI and TOF

Semi-Monolithic Meta-Scintillator Simulation Proof-of-Concept, Combining Accurate DOI and TOF

Research on the Technological Progress of CZT Array Detectors

GPU-accelerated three-dimensional reconstruction method of the Compton camera and its application in radionuclide imaging

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