| Autor: |
Raczyński Lech, Moskal Paweł, Kowalski Paweł, Wiślicki Wojciech, Bednarski Tomasz, Białas Piotr, Czerwiński Eryk, Gajos Aleksander, Kapłon Łukasz, Kochanowski Andrzej, Korcyl Grzegorz, Kowal Jakub, Kozik Tomasz, Krzemień Wojciech, Kubicz Ewelina, Niedźwiecki Szymon, Pałka Marek, Rudy Zbigniew, Salabura Piotr, Gupta-Sharma Neha, Silarski Michał, Słomski Artur, Smyrski Jerzy, Strzelecki Adam, Wieczorek Anna, Zieliński Marcin, Zoń Natalia |
| Jazyk: |
angličtina |
| Rok vydání: |
2016 |
| Předmět: |
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| Zdroj: |
Nukleonika, Vol 61, Iss 1, Pp 35-39 (2016) |
| Druh dokumentu: |
article |
| ISSN: |
0029-5922 |
| DOI: |
10.1515/nuka-2016-0012 |
| Popis: |
Nowadays, in positron emission tomography (PET) systems, a time of flight (TOF) information is used to improve the image reconstruction process. In TOF-PET, fast detectors are able to measure the difference in the arrival time of the two gamma rays, with the precision enabling to shorten significantly a range along the line-of-response (LOR) where the annihilation occurred. In the new concept, called J-PET scanner, gamma rays are detected in plastic scintillators. In a single strip of J-PET system, time values are obtained by probing signals in the amplitude domain. Owing to compressive sensing (CS) theory, information about the shape and amplitude of the signals is recovered. In this paper, we demonstrate that based on the acquired signals parameters, a better signal normalization may be provided in order to improve the TOF resolution. The procedure was tested using large sample of data registered by a dedicated detection setup enabling sampling of signals with 50-ps intervals. Experimental setup provided irradiation of a chosen position in the plastic scintillator strip with annihilation gamma quanta. |
| Databáze: |
Directory of Open Access Journals |
| Externí odkaz: |
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