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 |
punktacja MNiSW [2014 A]: 25