title: A flood map based DOI decoding method for block detector: a GATE simulation study.
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.
authors.affiliation: Tsinghua University, Welding Building Room 111, Beijing, China.
authors.forename: Han
authors.initials: H
authors.lastname: Shi
authors.affiliation: Tsinghua University, Welding Building Room 111, Beijing, China.
authors.forename: Dong
authors.initials: D
authors.lastname: Du
authors.affiliation: Southern Medical University, Guangzhou, China.
authors.forename: Zhihong
authors.initials: Z
authors.lastname: Su
authors.affiliation: Lawrence Berkeley National Laboratory, CA, USA.
authors.forename: Qiyu
authors.initials: Q
authors.lastname: Peng
mesh_terms: D003198:Computer Simulation; D017076:Computer-Aided Design; D004867:Equipment Design; D019544:Equipment Failure Analysis; D007089:Image Enhancement / Q000295:instrumentation* / Q000379:methods*; D015233:Models, Statistical; D009010:Monte Carlo Method; D049268:Positron-Emission Tomography / Q000295:instrumentation* / Q000379:methods*; D015203:Reproducibility of Results; D012680:Sensitivity and Specificity; D012984:Software; D014159:Transducers
keywords: GATE simulation; Positron emission tomography; depth of interaction