Modularized compact positron emission tomography detector for rapid system development

Daoming Xi; Xiang Liu; Chen Zeng; Wei Liu; Yanzhao Li; Yuexuan Hua; Xiongze Mei; Heejong Kim; Peng Xiao; Chien-Min Kao; Qingguo Xie

doi:10.1117/1.JMI.4.1.011006

20 December 2016 Modularized compact positron emission tomography detector for rapid system development

Daoming Xi, Xiang Liu, Chen Zeng, Wei Liu, Yanzhao Li, Yuexuan Hua, Xiongze Mei, Heejong Kim, Peng Xiao, Chien-Min Kao, Qingguo Xie

Author Affiliations +

Journal of Medical Imaging, Vol. 4, Issue 1, 011006 (December 2016). https://doi.org/10.1117/1.JMI.4.1.011006

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.

Citation Download Citation

Daoming Xi, Xiang Liu, Chen Zeng, Wei Liu, Yanzhao Li, Yuexuan Hua, Xiongze Mei, Heejong Kim, Peng Xiao, Chien-Min Kao, and Qingguo Xie "Modularized compact positron emission tomography detector for rapid system development," Journal of Medical Imaging 4(1), 011006 (20 December 2016). https://doi.org/10.1117/1.JMI.4.1.011006

Received: 28 June 2016; Accepted: 21 November 2016; Published: 20 December 2016

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