A5040337551- Radiation Detection and Scintillator Technologies
- Medical Imaging Techniques and Applications
- Nuclear Physics and Applications
- Atomic and Subatomic Physics Research
- Muon and positron interactions and applications
- Radiation Therapy and Dosimetry
- Diamond and Carbon-based Materials Research
- Boron Compounds in Chemistry
- Dark Matter and Cosmic Phenomena
- Particle physics theoretical and experimental studies
- Ion-surface interactions and analysis
- Nuclear reactor physics and engineering
- Advanced X-ray and CT Imaging
- Radiopharmaceutical Chemistry and Applications
- Nuclear physics research studies
Jagiellonian University
2023-2024
Institute of Physics
2023-2024
Debre Markos University
2019
Discrete symmetries play an important role in particle physics with violation of CP connected to the matter-antimatter imbalance Universe. We report most precise test P, T and invariance decays ortho-positronium, performed methodology involving polarization photons from these decays. Positronium, simplest bound state electron positron, is recent interest discrepancies reported between measured hyperfine energy structure theory at level $10^{-4}$ signaling a need for better understanding...
The modular J-PET scanner, comprising 24 compact and versatile modules, each consisting of 13 plastic strips with four SiPM detectors at the ends, represents a powerful tool for clinical applications in nuclear medical imaging. This study presents preliminary results from exploration simultaneous dual-isotope imaging using system. Our approach involved two isotopes: <sup>68</sup>Ge, characterized by ringlike shape, <sup>22</sup>Na, exhibiting point-like shape. was...
The positronium imaging technique represents a potential enhancement of the PET method. Its core principle involves employing β<sup>+</sup> radiation source that emits additional gamma (γ) quanta referred to as prompt gamma. Our aim is evaluate capability differentiate between annihilation and emissions, vital aspect imaging. For this purpose, selected isotopes should enable high efficiency purity in detecting both assessment identifying photons for various isotopes, which are...
In the state-of-the-art Positron Emission Tomography (PET), information about polarization of annihilation photons is not available. Current PET systems track molecules labeled with positron-emitting radioisotopes by detecting propagation direction two from positron-electron annihilation. However, carry more than just site where they originated. Here we present a novel J-PET scanner built plastic scintillators, in which interact predominantly via Compton effect, providing photon addition to...
The application of PET scanners to proton-beam-therapy monitoring is a promising solution obtain the range beam and hence positions Bragg peak – maximum dose deposition point. A proton induces nuclear reactions in tissue, leading production isotopes that emit <i>β<sup>+</sup></i> radiation. This enables imaging density distribution produced body, allowing reconstruction range. Moreover, detectors may open possibility for in-beam monitoring, which would offer an...
Positron Annihilation Lifetime Spectroscopy (PALS) is a well-established non-destructive technique used for nanostructural characterization of porous materials. It based on the annihilation positron and an electron. Mean lifetime in material depends free voids size molecular environment, allowing study porosity structural transitions nanometer scale. We have developed novel method enabling spatially resolved PALS, thus providing tomography extended object. Correlating space (position)...
In positron emission tomography acquisition (PET), sensitivity along a line of response can vary due to crystal geometrical arrangements in the scanner and/or detector inefficiencies, leading severe artefacts reconstructed image. To mitigate these effects, data must be corrected by set normalization coefficients applied each response. The J-PET Modular is PET device made 50 cm long plastic strips arranged axially, currently operation at Jagiellonian University Krak\'ow (Poland). We have...
Objective: Positron Emission Tomography (PET) is a widely used medical imaging technique that allows for non-invasive of metabolic processes. However, traditional PET scanners rely on costly inorganic scintillators, which limit their accessibility – especially in light emerging long axial field-of-view devices. The modular J-PET scanner, an innovative alternative, uses 50-cm plastic scintillator strips, offering cost-effective and solution. In this study, we develop assess the data...
Abstract Calculations of the excitation function 209 Bi ( α , n) 212 At, 2n) 211 At and 3n) 210 reactions have been focussed on alpha induced reac t ion. Energy ranges particles were taken into computations as 10 MeV to 70 MeV. The objective this study is compare computed results with experimental data existing in literature for each reactions. calculated Bi( ,xn) reaction cross-sections using computer code COMPLET then compared nuclear obtained from EXFOR library literature. This was...
Studies based on imaging the annihilation of electron (e$^{-}$) and its antiparticle positron (e$^{+}$) open up several interesting applications in nuclear medicine fundamental research. The process involves both direct conversion e$^{+}$e$^{-}$ into photons formation their atomically bound state, positronium atom (Ps), which can be used as a probe for studies. With ability to produce large quantities Ps, manipulate them long-lived Ps states, image annihilations after free fall or passing...
Positronium Imaging is gaining interest as a new promising method that may improve the diagnostic specificity of Positron Emission Tomography. Recently, first ex-vivo and in-vivo positronium lifetime images were demonstrated by means dedicated multi-photon J-PET system. The latest upgrades Biograph Vision Quadra (Siemens Healthineers) to singles mode acquisition open possibility imaging. In this simulation-based work, sensitivity both systems has been assessed function energy window applied...
The Modular J-PET scanner, developed by the collaboration, is a new prototype PET scanner based on axially arranged plastic scintillators as large axial field of view (50cm) affordable tomograph. In this study, performance characteristics were evaluated according to NEMA NU2-2018 standards using Monte Carlo simulation. order ensure selection true coincidence events, certain criteria established. Specifically, each photon emitting from single annihilation must deposit at least 200 keV within...