Mini Compton Camera Based on an Array of Frisch-grid CdZnTe Detectors

被引：0

作者：

Lee, Wonho ^{[1
]}

Bolotnikov, Aleksey ^{[2
]}

Lee, Taewoong ^{[1
]}

Camarda, Giuseppe ^{[2
]}

Cui, Yonggang ^{[2
]}

Gul, Rubi ^{[2
]}

Hossain, Anwar ^{[2
]}

Roy, Utpal ^{[2
]}

Yang, Ge ^{[2
]}

James, Ralph ^{[2
]}

机构：

[1] Korea Univ, Dept Bioconvergence Engn, Seoul 136701, South Korea

[2] Brookhaven Natl Lab, Dept Nonproliferat & Natl Secur, Upton, NY 11973 USA

来源：

2014 IEEE NUCLEAR SCIENCE SYMPOSIUM AND MEDICAL IMAGING CONFERENCE (NSS/MIC) | 2014年

基金：

新加坡国家研究基金会;

关键词：

Compton Camera; Electronic Collimation; Frisch-Grid; CdZnTe; SEMICONDUCTOR RADIATION DETECTOR; MAXIMUM-LIKELIHOOD; GAMMA-CAMERA; EM ALGORITHM; SPECTROMETERS; SCINTILLATOR; TOMOGRAPHY; EMISSION; READOUT;

D O I：

暂无

中图分类号：

TL [原子能技术]; O571 [原子核物理学];

学科分类号：

0827 ; 082701 ;

摘要：

We constructed a mini Compton camera based on an array of CdZnTe detectors and assessed its spectral and imaging properties. The entire array consisted of 6x6 Frisch-grid CdZnTe detectors, each with a size of 6x6x15 mm(3). Since it is easier and more practical to grow small CdZnTe crystals rather than large monolithic ones, constructing a mosaic array of parallelepiped crystals can be an effective way to build a more efficient, large-volume detector. With the fully operational CdZnTe array, we measured the energy spectra for Ba-133-, Cs-137-, Co-60-radiation sources; we also located these sources using a Compton imaging approach. Although the Compton camera was small enough to hand-carry, its intrinsic efficiency was several orders higher than those generated in previous research using spatially separated scintillator arrays, because our camera measured the interactions inside the CZT detector array, wherein the detector elements were positioned very close to each other.

引用

页数：7

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