Novel scintillating material 2-(4-styrylphenyl)benzoxazole for the fully digital and MRI compatible J-PET tomograph based on plastic scintillators

PLoS One. 2017 Nov 27;12(11):e0186728. doi: 10.1371/journal.pone.0186728. eCollection 2017.

Abstract

A novel plastic scintillator is developed for the application in the digital positron emission tomography (PET). The novelty of the concept lies in application of the 2-(4-styrylphenyl)benzoxazole as a wavelength shifter. The substance has not been used as scintillator dopant before. A dopant shifts the scintillation spectrum towards longer wavelengths making it more suitable for applications in scintillators of long strips geometry and light detection with digital silicon photomultipliers. These features open perspectives for the construction of the cost-effective and MRI-compatible PET scanner with the large field of view. In this article we present the synthesis method and characterize performance of the elaborated scintillator by determining its light emission spectrum, light emission efficiency, rising and decay time of the scintillation pulses and resulting timing resolution when applied in the positron emission tomography. The optimal concentration of the novel wavelength shifter was established by maximizing the light output and it was found to be 0.05 ‰ for cuboidal scintillator with dimensions of 14 mm x 14 mm x 20 mm.

MeSH terms

  • Benzoxazoles / chemistry*
  • Light
  • Magnetic Resonance Imaging*
  • Molecular Weight
  • Polymerization
  • Positron-Emission Tomography*
  • Scintillation Counting / instrumentation*
  • Spectrometry, Fluorescence
  • Styrenes / chemistry*
  • Temperature
  • Time Factors
  • Tomography*

Substances

  • Benzoxazoles
  • Styrenes

Grant support

This work was supported by INNOTECH-K1/IN1/64/159174/NCBR/12 (http://www.ncbr.gov.pl/), LIDER/274/L-6/14/NCBR/2015 (http://www.ncbr.gov.pl/), POIG.02.03.00-161 00- 013/09 (http://www.fnp.org.pl/), 7150/E-338/M/2015 (http://www.nauka.gov.pl/), 2016/21/B/ST2/01222 (https://www.ncn.gov.pl/), the Foundation for Polish Science through MPD programme, Marian Smoluchowski Krakow Research Consortium “Matter-Energy-Future,” and the Austrian Science Fund (FWFP 26783). The funders had no role in study design, data collection and analysis, decision to publish, or preparation of the manuscript.