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A flood map based DOI decoding method for block detector: A GATE simulation study

Issue title: Frontiers in Biomedical Engineering and Biotechnology – Proceedings of the 3rd International Conference on Biomedical Engineering and Biotechnology, 25–28 September 2014, Beijing, China

Article type: Research Article

Authors: Shi, Han | Du, Dong; | Su, Zhihong | Peng, Qiyu

Affiliations: Tsinghua University, Welding Building Room 111, Beijing, China | Southern Medical University, Guangzhou, China | Lawrence Berkeley National Laboratory, CA, USA

Note: [] Corresponding author: Dong Du, Department of Mechanical Engineer, Welding Building Room 113, Tsinghua University, Beijing, China. Tel./Fax: +86 01062783862; E-mail: [email protected].

Keywords: Positron emission tomography, depth of interaction, GATE simulation

DOI: 10.3233/BME-141134

Journal: Bio-Medical Materials and Engineering, vol. 24, no. 6, pp. 3121-3127, 2014

Published: 2014
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Abstract

Positron Emission Tomography (PET) systems using detectors with Depth of Interaction (DOI) capabilities could achieve higher spatial resolution and better image quality than those without DOI. Up till now, most DOI methods developed are not cost-efficient for a whole body PET system. In this paper, we present a DOI decoding method based on flood map for low-cost conventional block detector with four-PMT readout. Using this method, the DOI information can be directly extracted from the DOI-related crystal spot deformation in the flood map. GATE simulations are then carried out to validate the method, confirming a DOI sorting accuracy of 85.27%. Therefore, we conclude that this method has the potential to be applied in conventional detectors to achieve a reasonable DOI measurement without dramatically increasing their complexity and cost of an entire PET system.

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