Novel method for hit-position reconstruction using voltage signals in plastic scintillators and its application to Positron Emission Tomography

doi:10.1016/j.nima.2014.07.032

Novel method for hit-position reconstruction using voltage signals in plastic scintillators and its application to Positron Emission Tomography

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Novel method for hit-position reconstruction using voltage signals in plastic scintillators and its application to Positron Emission Tomography

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punktacja MNiSW [2014 A]: 25

title:	Novel method for hit-position reconstruction using voltage signals in plastic scintillators and its application to Positron Emission Tomography
author:	Raczyński L., Moskal Paweł , Kowalski P., Wiślicki W., Bednarski Tomasz , Białas Piotr , Czerwiński Eryk , Kapłon Łukasz , Kochanowski Andrzej , Korcyl Grzegorz , Kowal Jakub , Kozik Tomasz , Krzemień Wojciech , Kubicz Ewelina , Molenda Marcin , Moskal Ines, Niedźwiecki Szymon , Pałka Marek , Pawlik-Niedźwiecka Monika , Rudy Zbigniew , Salabura Piotr , Gupta-Sharma Neha , Silarski Michał , Słomski Artur , Smyrski Jerzy , Strzelecki Adam , Wieczorek Anna , Zieliński Marcin , Zoń Natalia
journal title:	Nuclear Instruments and Methods in Physics Research. Section A, Accelerators, Spectrometers, Detectors and Associated Equipment
volume:	764
date of publication :	2014
pages:	186-192
ISSN:	0168-9002
eISSN:	1872-9576
DOI:	10.1016/j.nima.2014.07.032
language:	English
journal language:	English
abstract in English:	Currently inorganic scintillator detectors are used in all commercial Time of Flight Positron Emission Tomograph (TOF-PET) devices. The J-PET collaboration investigates a possibility of construction of a PET scanner from plastic scintillators which would allow for single bed imaging of the whole human body. This paper describes a novel method of hit-position reconstruction based on sampled signals and an example of an application of the method for a single module with a 30 cm long plastic strip, read out on both ends by Hamamatsu R4998 photomultipliers. The sampling scheme to generate a vector with samples of a PET event waveform with respect to four user-defined amplitudes is introduced. The experimental setup provides irradiation of a chosen position in the plastic scintillator strip with an annihilation gamma quanta of energy 511 keV. The statistical test for a multivariate normal (MVN) distribution of measured vectors at a given position is developed, and it is shown that signals sampled at four thresholds in a voltage domain are approximately normally distributed variables. With the presented method of a vector analysis made out of waveform samples acquired with four thresholds, we obtain a spatial resolution of about 1 cm and a timing resolution of about 80 ps (σ).
keywords in English:	Positron Emission Tomography, plastic scintillators, statistical analysis
number of pulisher's sheets:	0,5
affiliation:	Wydział Fizyki, Astronomii i Informatyki Stosowanej : Instytut Fizyki im. Mariana Smoluchowskiego, Wydział Chemii : Zakład Technologii Chemicznej, Wydział Fizyki, Astronomii i Informatyki Stosowanej : Zespół Zakładów Informatyki Stosowanej
type:	journal article
subtype:	academic paper

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