Improving the spatial resolution in CZT detectors using charge sharing effect and transient signal analysis: Simulation study

Xin, Zheng; Zhou, Cheng; Deen, M. Jamal; Peng, Hao

doi:10.1016/j.nima.2015.11.006

Cited by 13 publications

(8 citation statements)

References 10 publications

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“…It is equal to pixel size convolved with charge cloud blurring kernel, which has a radius of around 50µm. This property is well studied [57,58]. As shown in Fig.…”

Section: Summary and Discussionmentioning

confidence: 93%

Design, Performance Evaluation, and Modeling of an Ultrahigh Resolution Detector Dedicated for Simultaneous SPECT/MRI

Lai

Cai

Tan

et al. 2022

IEEE Trans. Radiat. Plasma Med. Sci.

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“…It is equal to pixel size convolved with charge cloud blurring kernel, which has a radius of around 50µm. This property is well studied [57,58]. As shown in Fig.…”

Section: Summary and Discussionmentioning

confidence: 93%

Design, Performance Evaluation, and Modeling of an Ultrahigh Resolution Detector Dedicated for Simultaneous SPECT/MRI

Lai

Cai

Tan

et al. 2022

IEEE Trans. Radiat. Plasma Med. Sci.

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“…One method of obtaining spatial information from a semiconductor detector is to use so-called pixel detectors [114,115,117] in which a series of square pixels are patterned on one detector side, typically the anode side. In this case, only a single side of the detector must be read out to obtain two-dimensional position information.…”

Section: New Generation Photon Detectors: Czt Technologymentioning

confidence: 99%

The Core of Medical Imaging: State of the Art and Perspectives on the Detectors

et al. 2021

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In this review, the roles of detectors in various medical imaging techniques were described. Ultrasound, optical (near-infrared spectroscopy and optical coherence tomography) and thermal imaging, magnetic resonance imaging, computed tomography, single-photon emission tomography, positron emission tomography were the imaging modalities considered. For each methodology, the state of the art of detectors mainly used in the systems was described, emphasizing new technologies applied.

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“…In this configuration, the same 2D position information can be read from orthogonally crossed anode and cathode strips. Compared to the pixelated configuration, the cross-strip configuration will reduce the numbers of electrodes required to produce the same position resolution across the same volume of the detector (from N2 down to 2N), which greatly relieves the burden for the readout electronics [162].…”

Section: Cadmium Zinc Telluride (Czt) Detectorsmentioning

confidence: 99%

“…If these effects are not properly processed, degradation of the PDE, spatial resolution and energy resolution of CZT detectors can be expected. In [162], the authors carefully studied the charge sharing effect and analyzed the transient signals by simulation through Geant4 Application for Tomographic Emission (GATE)—a numerical simulation platform for radiotherapy and medical imaging. The simulations showed that a CZT detector with dimensions of 20 × 20 × 5 mm 3 achieved an SNR of ~17 and a subpixel spatial resolution of 30 µm by using the charge sharing method and of 250 µm by using transient signal analysis methods.…”

Section: Research Challenges and Conclusionmentioning

confidence: 99%

Sensors for Positron Emission Tomography Applications

Jiang

Chalich

Deen

2019

Sensors

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Positron emission tomography (PET) imaging is an essential tool in clinical applications for the diagnosis of diseases due to its ability to acquire functional images to help differentiate between metabolic and biological activities at the molecular level. One key limiting factor in the development of efficient and accurate PET systems is the sensor technology in the PET detector. There are generally four types of sensor technologies employed: photomultiplier tubes (PMTs), avalanche photodiodes (APDs), silicon photomultipliers (SiPMs), and cadmium zinc telluride (CZT) detectors. PMTs were widely used for PET applications in the early days due to their excellent performance metrics of high gain, low noise, and fast timing. However, the fragility and bulkiness of the PMT glass tubes, high operating voltage, and sensitivity to magnetic fields ultimately limit this technology for future cost-effective and multi-modal systems. As a result, solid-state photodetectors like the APD, SiPM, and CZT detectors, and their applications for PET systems, have attracted lots of research interest, especially owing to the continual advancements in the semiconductor fabrication process. In this review, we study and discuss the operating principles, key performance parameters, and PET applications for each type of sensor technology with an emphasis on SiPM and CZT detectors—the two most promising types of sensors for future PET systems. We also present the sensor technologies used in commercially available state-of-the-art PET systems. Finally, the strengths and weaknesses of these four types of sensors are compared and the research challenges of SiPM and CZT detectors are discussed and summarized.

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Improving the spatial resolution in CZT detectors using charge sharing effect and transient signal analysis: Simulation study

Cited by 13 publications

References 10 publications

Design, Performance Evaluation, and Modeling of an Ultrahigh Resolution Detector Dedicated for Simultaneous SPECT/MRI

Design, Performance Evaluation, and Modeling of an Ultrahigh Resolution Detector Dedicated for Simultaneous SPECT/MRI

The Core of Medical Imaging: State of the Art and Perspectives on the Detectors

Sensors for Positron Emission Tomography Applications

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