ArticleEJNMMI physics2022
Monte Carlo modelling of a compact CZT-based gamma camera with application to
Article in EJNMMI physics, 2022. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 5 papers.
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5 citing papers in PubMed, 5 citations in OpenAlex.
- Monte Carlo simulation and experimental validation of SPECT systems via energy spectrum decomposition and image profile analysis.EJNMMI physics · 2026Article
- Improved patient models for simulation of clinically realisticEJNMMI physics · 2026Article
- Accuracy of a whole-body single-photon emission computed tomography with a thallium-bromide detector: Verification via Monte Carlo simulations.Medical physics · 2025Article
- Monte Carlo methods for medical imaging research.Biomedical engineering letters · 2024Review
- Feasibility ofEJNMMI physics · 2024Article
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4 authors at 2 institutions in 1 country.
Funding
Abstract
backgroundSemiconductor gamma-camera systems based on cadmium zinc telluride (CZT) detectors present new challenges due to an energy-response that includes effects of low-energy tailing. In particular, such energy tails produce effects that need to be considered when imaging radionuclides with multiple emissions such as [Formula: see text]. Monte Carlo simulation can be used to investigate the behaviour of such systems and optimise their use, provided that the detector model closely reflects the real physical detector. The aim of this work is to develop a CZT model applicable for simulation of CZT-based gamma cameras.
methodsThe equations describing the charge transport and signal induction are considered in three dimensions and are solved numerically, and the CZT model is then realised by coupling the detector-response to the photon-transport handled by the SIMIND Monte Carlo program. The CZT model is tuned to reproduce experimentally measured energy spectra of a hand-held gamma camera system for multiple radionuclides ([Formula: see text], [Formula: see text] and [Formula: see text]) and parallel-hole collimators (MEGP, LEHR) as well as an uncollimated system.
resultsOverall, the model results agree well with measurements across the range of experimental conditions. The applicability of the model is demonstrated by separating energy spectra into components to investigate the interference of high-energy photons on lower energy-windows, where pronounced effects of low-energy tailing for [Formula: see text] are observed.
conclusionsThe developed model provides understanding of the specifics of the camera response and is expected to be helpful for future optimisation of gamma camera applications.
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