Efficiency determination of J-PET : first plastic scintillators-based PET scanner

doi:10.1186/s40658-023-00546-7

Efficiency determination of J-PET : first plastic scintillators-based PET scanner

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Efficiency determination of J-PET : first plastic scintillators-based PET scanner

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punktacja MEiN [2023]: 100

title:	Efficiency determination of J-PET : first plastic scintillators-based PET scanner
author:	Sharma Sushil , Baran Jakub , Chug Neha , Curceanu C., Czerwiński Eryk , Dadgar Meysam , Dulski Kamil , Valsan Eliyan Kavya , Gajos Aleksander , Gupta-Sharma Neha , Hiesmayr B. C., Kacprzak Krzysztof, Kapłon Łukasz , Klimaszewski Konrad , Konieczka P., Korcyl Grzegorz , Kozik Tomasz , Krzemień Wojciech, Kumar Deepak , Niedźwiecki Szymon , Panek Dominik , Parzych Szymon , Perez del Rio Elena , Raczyński L., Shivani Shivani , Shopa R. Y., Skurzok Magdalena , Stępień Ewa , Tayefi Ardebili Faranak , Tayefi Ardebili Keyvan , Wiślicki W., Moskal Paweł
journal title:	EJNMMI Physics
volume:	10
date of publication :	2023
article ID:	28
eISSN:	2197-7364
DOI:	10.1186/s40658-023-00546-7
language:	English
journal language:	English
abstract in English:	Background: The Jagiellonian Positron Emission Tomograph is the 3-layer prototype of the first scanner based on plastic scintillators, consisting of 192 half-metre-long strips with readouts at both ends. Compared to crystal-based detectors, plastic scintillators are several times cheaper and could be considered as a more economical alternative to crystal scintillators in future PETs. JPET is also a first multi-photon PET prototype. For the development of multi-photon detection, with photon characterized by the continuous energy spectrum, it is important to estimate the efficiency of J-PET as a function of energy deposition. The aim of this work is to determine the registration efficiency of the J-PET tomograph as a function of energy deposition by incident photons and the intrinsic efficiency of the J-PET scanner in detecting photons of different incident energies. In this study, 3-hit events are investigated, where 2-hits are caused by 511 keV photons emitted in e$^{+}$e$^{-}$ annihilations, while the third hit is caused by one of the scattered photons. The scattered photon is used to accurately measure the scattering angle and thus the energy deposition. Two hits by a primary and a scattered photon are sufficient to calculate the scattering angle of a photon, while the third hit ensures the precise labeling of the 511 keV photons. Results: By comparing experimental and simulated energy distribution spectra, the registration efficiency of the J-PET scanner was determined in the energy deposition range of 70–270 keV, where it varies between 20 and 100%. In addition, the intrinsic efficiency of the J-PET was also determined as a function of the energy of the incident photons. Conclusion: A method for determining registration efficiency as a function of energy deposition and intrinsic efficiency as a function of incident photon energy of the J-PET scanner was demonstrated. This study is crucial for evaluating the performance of the scanner based on plastic scintillators and its applications as a standard and multi-photon PET systems. The method may be also used in the calibration of Compton-cameras developed for the ion−beam therapy monitoring and simultaneous multi-radionuclide imaging in nuclear medicine.
keywords in English:	positron emission tomography, registration efciency, efciency of J-PET scanner, medical imaging
affiliation:	Wydział Fizyki, Astronomii i Informatyki Stosowanej : Instytut Fizyki im. Mariana Smoluchowskiego, Szkoła Doktorska Nauk Ścisłych i Przyrodniczych, Wydział Fizyki, Astronomii i Informatyki Stosowanej : Instytut Informatyki Stosowanej
type:	journal article
subtype:	academic paper