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15 February 2021 Back-end readout electronic design and initial results: a head-and-neck dedicated PET system based on CZT
Yuli Wang, Ryan Herbst, Shiva Abbaszadeh
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Proceedings Volume 11595, Medical Imaging 2021: Physics of Medical Imaging; 1159510 (2021) https://doi.org/10.1117/12.2576598
Event: SPIE Medical Imaging, 2021, Online Only
Abstract
Cadmium zinc telluride (CZT) radiation detectors are suitable for various applications, due to good energy performance at room temperature and simple pixilation to achieve high spatial resolution. Our group is developing a two-panel head-and-neck dedicated positron emission tomography (PET) system with CZT detectors. In this work, we present the back-end readout electronic design and the initial electronic noise results of our system. The back-end readout electronic incorporates RENA boards (a total 150 RENA boards for each panel), 30:1 fan-in boards connecting 30 RENA boards to the PicoZed 7010/7020 board (a total 5 fan-in boards for each panel). In each panel, 5:1 intermediate boards are used for biasing CZT detectors. The RENA board and the Picozed board are capable of data transmission of 50 Mbps and 6.6 Gbps, respectively. Electronic noise was also quantified using a square wave test pulse that provides charge injection into each channel of the RENA chip in the amount of 75fC/Volt. The pulse amplitude was chosen to generate approximately the same amount of charges as 511 keV photon would provide for each channels. The FWHM electronic noise at 511 keV was measured to be less than 1% (FWHM of 7.80 ± 1.47 ADC units or 4.89 ± 0.92 keV after conversion).
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Yuli Wang, Ryan Herbst, and Shiva Abbaszadeh "Back-end readout electronic design and initial results: a head-and-neck dedicated PET system based on CZT", Proc. SPIE 11595, Medical Imaging 2021: Physics of Medical Imaging, 1159510 (15 February 2021); https://doi.org/10.1117/12.2576598
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KEYWORDS
Positron emission tomography
Sensors
Cadmium
Data transmission
Spatial resolution
Zinc
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