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Journal of Medical Imaging

Modularized compact positron emission tomography detector for rapid system development
Author(s): Daoming Xi; Xiang Liu; Chen Zeng; Wei Liu; Yanzhao Li; Yuexuan Hua; Xiongze Mei; Heejong Kim; Peng Xiao; Chien-Min Kao; Qingguo Xie
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Paper Abstract

We report the development of a modularized compact positron emission tomography (PET) detector that outputs serial streams of digital samples of PET event pulses via an Ethernet interface using the UDP/IP protocol to enable rapid configuration of a PET system by connecting multiple such detectors via a network switch to a computer. Presently, the detector is 76    mm × 50    mm × 55    mm in extent (excluding I/O connectors) and contains an 18 × 12 array of 4.2 × 4.2 × 20    mm 3 one-to-one coupled lutetium-yttrium oxyorthosilicate/silicon photomultiplier pixels. It employs cross-wire and stripline readouts to merge the outputs of the 216 detector pixels to 24 channels. Signals at these channels are sampled using a built-in 24-ch, 4-level field programmable gate arrays-only multivoltage threshold digitizer. In the computer, software programs are implemented to analyze the digital samples to extract event information and to perform energy qualification and coincidence filtering. We have developed two such detectors. We show that all their pixels can be accurately discriminated and measure a crystal-level energy resolution of 14.4% to 19.4% and a detector-level coincidence time resolution of 1.67 ns FWHM. Preliminary imaging results suggests that a PET system based on the detectors can achieve an image resolution of 1.6    mm .

Paper Details

Date Published: 20 December 2016
PDF: 9 pages
J. Med. Imag. 4(1) 011006 doi: 10.1117/1.JMI.4.1.011006
Published in: Journal of Medical Imaging Volume 4, Issue 1
Show Author Affiliations
Daoming Xi, Raycan Technology Co., Ltd. (China)
Xiang Liu, Huazhong Univ. of Science and Technology (China)
Chen Zeng, Raycan Technology Co., Ltd. (China)
Huazhong Univ. of Science and Technology (China)
Wei Liu, Raycan Technology Co., Ltd. (China)
Yanzhao Li, Huazhong Univ. of Science and Technology (China)
Yuexuan Hua, Raycan Technology Co., Ltd. (China)
Huazhong Univ. of Science and Technology (China)
Xiongze Mei, Raycan Technology Co., Ltd. (China)
Huazhong Univ. of Science and Technology (China)
Heejong Kim, The Univ. of Chicago (United States)
Peng Xiao, Huazhong Univ. of Science and Technology (China)
Wuhan National Lab. for Optoelectronics (China)
Chien-Min Kao, The Univ. of Chicago (United States)
Qingguo Xie, Huazhong Univ. of Science and Technology (China)
Wuhan National Lab. for Optoelectronics (China)


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