Fabrication and characterization of a 500-<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" id="mml15" display="inline" overflow="scroll" altimg="si2.gif"><mml:mi mathvariant="normal">μ</mml:mi></mml:math>m-pitch 64-channel silicon photomultiplier prototype

Koyama, Akihiro; Shimazoe, Kenji; Wiest, F.; Iskra, P.; Ganka, T.; Schneider, Florian; Gebauer, W.; Yoshino, Masao; Kamada, Kei; Yoshikawa, Akira; Takahashi, Hiroyuki

doi:10.1016/j.nima.2017.12.061

Cited by 5 publications

(2 citation statements)

References 10 publications

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“…In this study, we adopted a GFAG scintillation detector because of its stability, nonhygroscopicity, moderate energy resolution, and fast decay time. However, the performance of the system can be further improved using faster and better performing scintillation detectors, e.g., LaBr3 and CeBr3, which exhibit decay times of less than 20 ns and better energy resolutions [25][26][27][28][29][30][31][32][33][34][35][36][37] . Therefore, such detectors do not have packaging issues; that is, they do not require mitigation of hygroscopicity and are thus excellent potential candidates for PCCT.…”

Section: Further Improvements In the Proposed Methodsmentioning

confidence: 99%

“…Notably, owing to the recent advances in photon sensing technology (such as improvements in silicon photomultipliers (SiPMs) 18 , which are based on arrays of numerous single-photon avalanche diodes (SPADs) [19][20][21][22] , indirect radiation detectors have recently come under the spotlight as viable PCDs 23 . However, studies on material identification using detection systems composed of scintillation crystals combined with SiPMs, featuring small pixel sizes (such as 1 mm), are scarce 24,25 . For instance, Sar et al In this study, we designed and developed a functional fine-pitch energy resolving PCD, composed of a scintillation crystal array and fine-pitch SiPM array, for PCCT.…”

Section: Introductionmentioning

confidence: 99%

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Scintillator–single-photon avalanche diode array-based energy resolving photon counting X-ray detector

Shimazoe,

Kim,

Hamdan

et al. 2024

Preprint

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X-ray photon counting computed tomography (PCCT) has garnered considerable interest owing to its low dose administration, high-quality imaging, and material decomposition characteristics. Current commercial PCCT systems employ compound semiconductor photon counting X-ray detectors, which offer good energy resolution. However, the choice of materials is limited, and cadmium telluride or cadmium zinc telluride is mostly used. Although indirect radiation detectors can be used as alternatives to compound semiconductor detectors, implementing fine-pitch segmentation in such detectors is challenging. In the present study, we designed an indirect fine-pitch X-ray photon counting detector by combining miniaturized silicon photomultiplier arrays and fast scintillation crystals, with a pixel size of 250 µm, for PCCT. Performance characterization of the fabricated detector reveals its potential to discriminate photon energies with a reasonable resolution, good spatial resolution, charge-sharing inhibition ability.

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Section: Further Improvements In the Proposed Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Scintillator–single-photon avalanche diode array-based energy resolving photon counting X-ray detector

Shimazoe,

Kim,

Hamdan

et al. 2024

Preprint

View full text Add to dashboard Cite

show abstract

An energy-resolving photon-counting X-ray detector for computed tomography combining silicon-photomultiplier arrays and scintillation crystals

Shimazoe,

Kim,

Hamdan

et al. 2024

Commun Eng

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X-ray photon-counting computed tomography (PCCT) has garnered considerable interest owing to its low-dose administration, high-quality imaging, and material decomposition characteristics. Current commercial PCCT systems employ compound semiconductor photon-counting X-ray detectors, which offer good energy resolution. However, the choice of materials is limited, and cadmium telluride or cadmium zinc telluride is mostly used. Although indirect radiation detectors can be used as alternatives to compound semiconductor detectors, implementing fine-pitch segmentation in such detectors is challenging. Here we designed an indirect fine-pitch X-ray photon-counting detector by combining miniaturized silicon photomultiplier arrays and fast scintillation crystals, with a pixel size of 250 µm, for future indirect PCCT. The fabricated array detector has the potential to discriminate photon energies with a 27% resolution at 122 keV, 296 µm spatial resolution, and charge-sharing inhibition ability.

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Development of a dual-sided readout DOI-PET detector using 500-μm-pitch 64-ch SiPMs

et al. 2019

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Positron emission tomography (PET) is a nuclear imaging technique that can visualize molecular-level biological processes and is widely used in cancer examinations. The current spatial resolution of small-animal PET systems is sub-millimeter level.In addition, the pixel size of the detector and parallax error are important factors that affect the spatial resolution of a PET imaging system. In this study, to develop a high-resolution small-animal depth-of-interaction (DOI) PET detector, we used a novel 500-µm-pitch silicon photomultipliers (SiPMs), as developed by UTokyo and KETEK, that has a recovery time of 8 ns and gain of 1 × 10 6 . To realize DOI estimation, two SiPMs were used to detect the scintillation light from both ends of a Ce:Gd 3 Al 2 Ga 3 O 12 (GAGG) scintillator (0.4 mm × 0.4 mm × 20 mm). The experimental results show that a good DOI resolution of less than 3 mm can be achieved. The simulation results show that, for a detector with 3-mm DOI resolution, the spatial resolution was approximately 0.28 mm at the center of the field of view, and 0.63 mm at 20 mm from the center.

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Fabrication and characterization of a 500-μm-pitch 64-channel silicon photomultiplier prototype

Cited by 5 publications

References 10 publications

Scintillator–single-photon avalanche diode array-based energy resolving photon counting X-ray detector

Scintillator–single-photon avalanche diode array-based energy resolving photon counting X-ray detector

An energy-resolving photon-counting X-ray detector for computed tomography combining silicon-photomultiplier arrays and scintillation crystals

Development of a dual-sided readout DOI-PET detector using 500-μm-pitch 64-ch SiPMs

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