1. Synchronization and Calibration of the 24-Modules J-PET Prototype With 300-mm Axial Field of View.
- Author
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Moskal, P., Bednarski, T., Niedzwiecki, Sz., Silarski, M., Czerwinski, E., Kozik, T., Chhokar, J., Bala, M., Curceanu, C., Grande, R. Del, Dadgar, M., Dulski, K., Gajos, A., Gorgol, M., Gupta-Sharma, N., Hiesmayr, B. C., Jasinska, B., Kacprzak, K., Kaplon, L., and Karimi, H.
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POSITRON emission tomography , *DATA acquisition systems , *COINCIDENCE , *CALIBRATION , *PROTOTYPES , *ATTENUATION of light - Abstract
Research conducted in the framework of the Jagiellonian-PET (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, which 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 the 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 ${\mathrm {CRT}}=490\pm 9$ ps. This value can be translated to the position reconstruction accuracy $\sigma (\Delta l) =18$ mm, which is fairly position independent. [ABSTRACT FROM AUTHOR]
- Published
- 2021
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