Speaker
Description
Total-body Jagiellonian positron emission tomography (TB-J-PET) is based on long plastic scintillators [1] which decrease cost of the scanner [2]. Total-body PET scanners enable positronium lifetime imaging of organs in human body [3] and tissue samples [4], measurements of polarization of photons [5], CPT symmetry [6], and beam therapy monitoring [7]. Development of TB-J-PET requires application of transparent plastic scintillators with low light attenuation [8] to build long modules with silicon photomultipliers attached at both ends of the scintillators. Modular TB-J-PET construction requires quality control of plastic scintillators and verifying its optical properties [9]. Purpose of this research is to verify time resolution of plastic scintillators for the TB-J-PET modules construction.
Six types of polyvinyltoluene-based plastic scintillators with mission spectra covering the maximum quantum efficiency of light detection of silicon photomultipliers, were measured. The plastic scintillators had dimensions of 6 mm × 30 mm × 500 mm, polished surfaces: faces as-cast and edges diamond-milled, and were manufactured by Eljen Technology. The time resolution was measured at three points along the scintillator using a setup consisting of silicon photomultipliers (Hamamatsu, S13361-6674), oscilloscope, power supply, black box, and collimated Na-22 source.
The best time resolution were achieved by the EJ-204, EJ-200, EJ-208 plastic scintillators combining short signal decay time, high light output, high transparency, and the best match of the emission spectrum to the maximum quantum efficiency of the photomultipliers. The best plastic scintillator type for the next generation total-body J-PET scanner is EJ-200. The EJ-200 plastic scintillator combines the best time resolution with uniform time resolution along the scintillator strip.
[1] S. Vandenberghe, P. Moskal, J. Karp, EJNMMI Physics 7 (2020) 35
[2] P. Moskal et al., Physics in Medicine and Biology 66 (2021) 175015
[3] P. Moskal et al., Science Advances 10(37) (2024) eadp2840
[4] M. Das et al., Scientific Reports (2026) in press
[5] P. Moskal et al., Science Advances 11(18) (2025) eads3046
[6] N. Chug et al., Physical Review D 113 (2025) 032003
[7] K. Parodi, T. Yamaya, P. Moskal, Journal of Medical Physics 33 (2023) 22
[8] Ł. Kapłon, et al., Nuclear Instruments and Methods in Physics Research A 1051 (2023) 168186
[9] Ł. Kapłon et al., Journal of Instrumentation 20 (2025) P09019
| Track | TBPET |
|---|---|
| Presentation type | Oral |