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Proceedings Paper

An investigation of digital signal processing for shaped pulses for all-digital PET
Author(s): Qingguo Xie; Jun Zhu; Xi Wang; Bo Zhang; Caigang Zhu; Ning Guo; Zhi Zhang; Chin-Tu Chen; Yau W. Wah; Mircea Bogdan; Chien-Min Kao
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Paper Abstract

We present our work toward implementing all-digital signal processing for Positron Emission Tomography (PET) event detection. In the conventional PET system, proper calibration and extending event processing are challenging tasks due to the huge number of channels and multiplexing of input signals in the mixed-signal front-end. To alleviate such limitations, we have proposed a simple all-digital PET system utilizing digital signal processing (DSP) technologies for analyzing event pulses generated in PET. In this work, we implement a Gaussian shaper circuit for scintillation pulses, which followed by a moderate sampling rate Analog-to-Digital Converter (ADC). We also evaluate two DSP algorithms for extracting time information from the digitized pulse samples, and the two algorithms examined could generate a coincidence timing resolution of ~ 2.4ns FWHM, by using a 125MSps sampling rate ADC.

Paper Details

Date Published: 18 March 2008
PDF: 7 pages
Proc. SPIE 6913, Medical Imaging 2008: Physics of Medical Imaging, 69134B (18 March 2008); doi: 10.1117/12.769704
Show Author Affiliations
Qingguo Xie, Huazhong Univ. of Science and Technology (China)
The Univ. of Chicago (United States)
Jun Zhu, Huazhong Univ. of Science and Technology (China)
Xi Wang, Huazhong Univ. of Science and Technology (China)
Bo Zhang, Huazhong Univ. of Science and Technology (China)
Caigang Zhu, Huazhong Univ. of Science and Technology (China)
Ning Guo, Huazhong Univ. of Science and Technology (China)
Zhi Zhang, Huazhong Univ. of Science and Technology (China)
Chin-Tu Chen, The Univ. of Chicago (United States)
Yau W. Wah, The Univ. of Chicago (United States)
Mircea Bogdan, The Univ. of Chicago (United States)
Chien-Min Kao, The Univ. of Chicago (United States)


Published in SPIE Proceedings Vol. 6913:
Medical Imaging 2008: Physics of Medical Imaging
Jiang Hsieh; Ehsan Samei, Editor(s)

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