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Scientific article
Open access
English

Development of novel low-cost readout electronics for large field-of-view gamma camera detectors

Published inPhysica medica, vol. 121, 103357
Publication date2024-05
Abstract

Purpose: Large scintillation crystals-based gamma cameras play a crucial role in nuclear medicine imaging. In this study, a large field-of-view (FOV) gamma detector consisting of 48 square PMTs developed using a new readout electronics, reducing 48 (6 × 8) analog signals to 14 (6 + 8) analog sums of each row and column, with reduced complexity and cost while preserving image quality.

Methods: All 14 analog signals were converted to digital signals using AD9257 high-speed analog to digital (ADC) converters driven by the SPARTAN-6 family of field-programmable gate arrays (FPGA) in order to calculate the signal integrals. The positioning algorithm was based on the digital correlated signal enhancement (CSE) algorithm implemented in the acquisition software. The performance characteristics of the developed gamma camera were measured using the NEMA NU 1-2018 standards.

Results: The measured energy resolution of the developed detector was 8.7 % at 140 keV, with an intrinsic spatial resolution of 3.9 mm. The uniformity was within 0.6 %, while the linearity was within 0.1 %.

Conclusion: The performance evaluation demonstrated that the developed detector has suitable specifications for high-end nuclear medicine imaging.

eng
Keywords
  • Gamma camera
  • NEMA NU 1-2018
  • Readout electronics
  • Square PMT
Citation (ISO format)
RADNIA, Aram et al. Development of novel low-cost readout electronics for large field-of-view gamma camera detectors. In: Physica medica, 2024, vol. 121, p. 103357. doi: 10.1016/j.ejmp.2024.103357
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ISSN of the journal1120-1797
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Technical informations

Creation04/19/2024 8:06:38 AM
First validation05/23/2024 12:22:58 PM
Update time05/23/2024 12:22:58 PM
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