Special Section on Development, Challenges, and Opportunities of Positron Emission Tomography

Modularized compact positron emission tomography detector for rapid system development

[+] Author Affiliations
Daoming Xi, Wei Liu

Raycan Technology Co., Ltd., Building 17, 8 Jinfeng Road, SND, Suzhou, Jiangsu 215163, China

Xiang Liu, Yanzhao Li

Huazhong University of Science and Technology, Department of Biomedical Engineering, Luoyu Road 1037, Wuhan, Hubei 430074, China

Chen Zeng, Yuexuan Hua, Xiongze Mei

Raycan Technology Co., Ltd., Building 17, 8 Jinfeng Road, SND, Suzhou, Jiangsu 215163, China

Huazhong University of Science and Technology, Department of Biomedical Engineering, Luoyu Road 1037, Wuhan, Hubei 430074, China

Heejong Kim, Chien-Min Kao

University of Chicago, Department of Radiology, 5841 South Maryland Avenue, MC-2026, Chicago, Illinois 60637, United States

Peng Xiao, Qingguo Xie

Huazhong University of Science and Technology, Department of Biomedical Engineering, Luoyu Road 1037, Wuhan, Hubei 430074, China

Wuhan National Laboratory for Optoelectronics, Luoyu Road 1037, Wuhan, Hubei 430074, China

J. Med. Imag. 4(1), 011006 (Dec 20, 2016). doi:10.1117/1.JMI.4.1.011006
History: Received June 28, 2016; Accepted November 21, 2016
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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  mm3 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.

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© 2016 Society of Photo-Optical Instrumentation Engineers

Citation

Daoming Xi ; Xiang Liu ; Chen Zeng ; Wei Liu ; Yanzhao Li, et al.
"Modularized compact positron emission tomography detector for rapid system development", J. Med. Imag. 4(1), 011006 (Dec 20, 2016). ; http://dx.doi.org/10.1117/1.JMI.4.1.011006


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