English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Plus annual

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Plus monthly

Global: Zendy Tools annual

Global: Zendy Tools monthly

Global: Zendy Free Plan

In this article, a new method for the reconstruction of hit-position andhit-time of photons in long scintillator detectors is investigated. Thisresearch is motivated by the recent development of the positron emissiontomography scanners based on plastic scintillators. The proposed methodconstitutes a new way of signal processing in Multi-Voltage-Technique. It isbased on the determination of the degree of similarity between the registeredsignals and the synchronized model signals stored in a library. The library wasestablished for a set of well defined hit-positions along the length of thescintillator. The Mahalanobis distance was used as a measure of similaritybetween the two compared signals. The method was validated on the experimentaldata measured using two-strips J-PET prototype with dimensions of 5x9x300mm$^3$. The obtained Time-of-Flight (TOF) and spatial resolutions amount to325~ps (FWHM) and 25~mm (FWHM), respectively. The TOF resolution was alsocompared to the results of an analogous study done using Linear Fitting method.The best TOF resolution was obtained with this method at four pre-definedthreshold levels which was comparable to the resolution achieved from theMahalanobis distance at two pre-defined threshold levels. Although thealgorithm of Linear Fitting method is much simpler to apply than theMahalanobis method, the application of the Mahalanobis distance requires alower number of applied threshold levels and, hence, decreases the costs ofelectronics used in PET scanner.

Hit-time and hit-position reconstruction in strips of plastic scintillators using multi-threshold readouts