Synchronization and Calibration of the 24-Modules J-PET Prototype With 300-mm Axial Field of View

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Abstract
Research conducted in the framework of the J-PET project aims to develop a cost-effective total-body positron emission tomography scanner. As a first step on the way to construct a full-scale J-PET tomograph from long strips of plastic scintillators, a 24-strip prototype was built and tested. The prototype consists of detection modules arranged axially forming a cylindrical diagnostic chamber with the inner diameter of 360 mm and the axial field-of-view of 300 mm. Promising perspectives for a low-cost construction of a total-body PET scanner are opened due to an axial arrangement of strips of plastic scintillators, wchich have a small light attenuation, superior timing properties, and the possibility of cost-effective increase of the axial field-of-view. The presented prototype comprises dedicated solely digital front-end electronic circuits and a triggerless data acquisition system which required development of new calibration methods including time, thresholds and gain synchronization. The system and elaborated calibration methods including first results of the 24-module J-PET prototype are presented and discussed. The achieved coincidence resolving time equals to CRT = 490 ± 9 ps. This value can be translated to the position reconstruction accuracy σ(Δ) = 18 mm which is fairly position-independent Keywords: positron emission tomography, plastic scintillators, J-PET.
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Funding Information
  • The Polish National Center for Research and Development (INNOTECH-K1/IN1/64/159174/NCBR/12)
  • Foundation for Polish Science through the MPD and TEAM Programs (POIR.04.04.00-00-4204/17)
  • Narodowe Centrum Nauki (2016/21/B/ST2/01222)
  • Narodowe Centrum Nauki (2017/25/N/NZ1/00861)
  • Ministry for Science and Higher Education (6673/IA/SP/2016)
  • Ministry for Science and Higher Education (7150/E338/SPUB/2017/1)
  • Ministry for Science and Higher Education (7150/E-338/M/2017)
  • Austrian Science Fund (FWF-P26783)

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