Comparative studies of plastic scintillator strips with high technical attenuation length for the total-body J-PET scanner

Kapłon, Ł.; Baran, Jakub; Chug, Neha; Coussat, A.; Curceanu, C.; Czerwiński, E.; Dadgar, M.; Dulski, K.; Gajewski, J.; Gajos, A.; Hiesmayr, Beatrix C.; Eliyan, Kavya Valsan; Klimaszewski, K.; Korcyl, G.; Kozik, T.; Krzemień, W.; Kumar, D.; Niedźwiecki, Szymon; Panek, Dominik; Parzych, Szymon; Río, E. Pérez del; Raczyński, L.; Ruciński, Antoni; Sharma, Sushil; Shivani, Shivendra; Shopa, R. Y.; Silarski, M.; Skurzok, M.; Stępień, Ewa; Ardebili, F. Tayefi; Ardebili, K. Tayefi; Wiślicki, W.; Moskal, P.

doi:10.1016/j.nima.2023.168186

Cited by 4 publications

(1 citation statement)

References 48 publications

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“…The novelty of the reported measurement is in the determination of the polarization plane of annihilation photons and the experimental coverage of the whole angular range of the tested correlation. In addition, application of data acquisition system based on a fast, trigger-less, field-programmable gate array (FPGA) 32 , 33 and good timing properties of the plastic scintillators used in the experiment 34 – 36 (short light signals with 1 ns rising and 2 ns falling edges) and a high activity β + radioactive source allowed us to register the highest number of o-Ps → 3 γ annihilations for discrete symmetry studies so far recorded.…”

Section: Resultsmentioning

confidence: 99%

Discrete symmetries tested at 10−4 precision using linear polarization of photons from positronium annihilations

Moskal,

Czerwiński,

Raj

et al. 2024

Nat Commun

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Discrete symmetries play an important role in particle physics with violation of CP connected to the matter-antimatter imbalance in the Universe. We report the most precise test of P, T and CP invariance in decays of ortho-positronium, performed with methodology involving polarization of photons from these decays. Positronium, the simplest bound state of an electron and positron, is of recent interest with discrepancies reported between measured hyperfine energy structure and theory at the level of 10−4 signaling a need for better understanding of the positronium system at this level. We test discrete symmetries using photon polarizations determined via Compton scattering in the dedicated J-PET tomograph on an event-by-event basis and without the need to control the spin of the positronium with an external magnetic field, in contrast to previous experiments. Our result is consistent with QED expectations at the level of 0.0007 and one standard deviation.

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Section: Resultsmentioning

confidence: 99%

Discrete symmetries tested at 10−4 precision using linear polarization of photons from positronium annihilations

Moskal,

Czerwiński,

Raj

et al. 2024

Nat Commun

Self Cite

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Performance Simulation of Muon Detectors Based on Structural Design and Array Layout of Plastic Scintillators

Wang,

Li,

Wang

et al. 2024

J. Inst.

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The performances of muon detectors have prominent effects on the accuracy and application scenario of muon imaging. Previous studies have paid more attention to the performance improvements of muon detectors in the assembly of imaging systems and optimization of imaging algorithms, while, the structural design and array layout of plastic scintillators in muon detectors have received less attention. In this work, the simulation models of plastic scintillator, wavelength-shifting (WLS) fibers, and muon source are constructed in the Geant4 software. On this basis, different factors affecting light collection efficiency (LCE) have been investigated, including muon hitting position, plastic scintillator cross-sectional shape and size, and WLS fiber size and position. Meanwhile, the influences of scintillator array layout, average width, and muon energy on the position resolution performance of the detector are investigated. The constructive results have been listed as follows: (a) the longitudinal length of the plastic scintillator unit, the shape and size of the WLS fiber, and the position of the WLS fiber have a large impact on the LCE. (b) The Right-angled triangle staggered layout is suitable for small-sized scintillators with single-energy muon hitting, and the Rhombus staggered layout is suitable for large-sized scintillators with multiple-energy muon hitting. This work provides theoretical support for the structural design and array layout of plastic Scintillators, and it has an important significance as a guide for the design of the subsequent muography system.

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A cross-staged gantry for total-body PET and CT imaging

Kaplanoğlu,

Moskal

2023

Bio-Algorithms and Med-Systems

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Total-body Positron Emission Tomography (PET) scanning is a promising new method for rapidly acquiring comprehensive wide-volume metabolic data with a lower radiation dosage compared to discrete whole-body PET imaging. PET scanners are generally used with Computed Tomography (CT) scanners to precisely understand tumor location and composition with the help of anatomical images. However, PET/CT sequential imaging methods for simultaneous total-body imaging are impractical for claustrophobic patients due to the enclosed gantry design and require large examination rooms because of the need for an exceptionally long patient table. To address this challenge, the Jagiellonian- -PET Tomography (J-PET) Total-body scanner employs an innovative approach: utilizing both PET and CT devices on the same patient table but from different axes. The motion system of the J-PET Total Body scanner requires custom linear stages to move both PET and CT gantries. In this study, a novel cross-staged linear guiding solution is proposed by combining scanners on intersecting separable stages. The proposed sliding system is a combination of different machine elements and will be produced for the J-PET Total-body PET/CT Scanner. Concept designs are shown, and the proposed system is described. The application of the system for the J-PET total-body PET/CT scanner is discussed. The proposed solution is still in the development phase. The system holds the potential to achieve combining CT and PET scanners from different axes and enables motion artifact-free imaging for total-body imaging.

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Comparative studies of plastic scintillator strips with high technical attenuation length for the total-body J-PET scanner

Cited by 4 publications

References 48 publications

Discrete symmetries tested at 10−4 precision using linear polarization of photons from positronium annihilations

Discrete symmetries tested at 10−4 precision using linear polarization of photons from positronium annihilations

Performance Simulation of Muon Detectors Based on Structural Design and Array Layout of Plastic Scintillators

A cross-staged gantry for total-body PET and CT imaging

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