Row-Column Readout Method to Mitigate Radiographic-Image Blurring From Multipixel Events in a Coded-Aperture Imaging System

被引：7

作者：

Boo, Jihwan ^{[1
]}

Hammig, Mark D. ^{[2
]}

Jeong, Manhee ^{[1
]}

机构：

[1] Jeju Natl Univ, Dept Nucl & Energy Engn, Jeju Si 63243, South Korea

[2] Univ Michigan, Dept Nucl Engn & Radiol Sci, Ann Arbor, MI 48109 USA

来源：

IEEE TRANSACTIONS ON NUCLEAR SCIENCE | 2021年 / 68卷 / 05期

关键词：

Scattering; Image reconstruction; Gamma-rays; Scintillators; Imaging; Detectors; Mathematical model; Coded-aperture; Compton scattering; multipixel events rejection; row– column readout; silicon photomultiplier (SiPM) array;

D O I：

10.1109/TNS.2021.3066414

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

In order to improve the image quality of a coded-aperture-based gamma-ray imaging apparatus, a method for removing Compton scattered and other multipixel events is presented that removes inaccurate position estimations from the data stream. In coded-aperture gamma-ray imaging detectors, scattering events that are shared between different partitions in the active medium can result in the inaccurate determination of the initial gamma-ray interaction position, the result of which is distortion in the angular reconstruction mapping. For coded-aperture system in which the rapid localization and identification of the emitting source is important, the distortion due to scattered radiation can increase the integration time of the system. We show, in both software and hardware implementations using a cerium-doped gadolinium aluminum gallium garnet pixelated scintillator array, that filtering the data to remove multipixel events can improve the image quality despite the efficiency loss associated with not utilizing all of the interactions within the detector.

引用

页码：1175 / 1183

页数：9

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