B. Zgardzińska
A5058715811- Muon and positron interactions and applications
- Radiation Detection and Scintillator Technologies
- Medical Imaging Techniques and Applications
- Atomic and Subatomic Physics Research
- Atomic and Molecular Physics
- Graphene research and applications
- Synthesis and characterization of novel inorganic/organometallic compounds
- Ammonia Synthesis and Nitrogen Reduction
- Advancements in Battery Materials
- Particle Detector Development and Performance
- Nuclear Physics and Applications
- Silicone and Siloxane Chemistry
- Advanced MRI Techniques and Applications
- Advanced NMR Techniques and Applications
- Advanced X-ray and CT Imaging
- X-ray Diffraction in Crystallography
- Material Dynamics and Properties
- Neutrino Physics Research
- Hydrogen Storage and Materials
- Membrane Separation and Gas Transport
- Glass properties and applications
- Advanced biosensing and bioanalysis techniques
- Advanced Battery Materials and Technologies
- Advanced Radiotherapy Techniques
- Biopolymer Synthesis and Applications
Maria Curie-Skłodowska University
2015-2024
Istituto Nazionale di Fisica Nucleare, Sezione di Milano
2019
Istituto Nazionale di Fisica Nucleare, Trento Institute for Fundamental Physics And Applications
2019
Institute of Physics
2005-2018
Jagiellonian University
2016-2017
OncoRay
2016
TU Dresden
2016
Massachusetts General Hospital
2016
Dokuz Eylül University
2016
Institute of Metallurgy and Materials Science
2016
A detection system of the conventional PET tomograph is set-up to record data from e+ e- annihilation into two photons with energy 511 keV, and it gives information on density distribution a radiopharmaceutical in body object. In this paper we explore possibility performing three gamma imaging based ortho-positronium annihilation, as well positronium mean lifetime J-PET constructed plastic scintillators. For purposes simulations formation its were performed taking account distributions...
The Jagiellonian Positron Emission Tomograph (J-PET) is the first PET built from plastic scintillators.J-PET prototype consists of 192 detection modules arranged axially in three layers forming a cylindrical diagnostic chamber with inner diameter 85 cm and axial field-of-view 50 cm.An arrangement long strips scintillators, their small light attenuation, superior timing properties, relative ease increase opens promising perspectives for cost effective construction whole-body scanner, as well...
The novel whole-body PET system based on plastic scintillators is developed by the {J-PET} Collaboration. It consists of scintillator strips arranged axially in form a cylinder, allowing cost-effective construction total-body PET. In order to determine properties scanner prototype and optimize its geometry, advanced computer simulations using GATE software were performed. spatial resolution, sensitivity, scatter fraction noise equivalent count rate estimated according NEMA norm as function...
In this article it is presented an FPGA based $M$ulti-$V$oltage $T$hreshold (MVT) system which allows of sampling fast signals ($1-2$ ns rising and falling edge) in both voltage time domain. It possible to achieve a precision measurement $20$ ps RMS reconstruct charge signals, using simple approach, with deviation from real value smaller than 10$\%$. Utilization the differential inputs chip as comparators together implementation TDC inside allowed us compact multi-channel characterized by...
A novel approach to tomographic data processing has been developed and evaluated using the Jagiellonian PET (J-PET) scanner as an example. We propose a system in which there is no need for powerful, local facility, capable reconstruct images on fly. Instead we introduce Field Programmable Gate Array (FPGA) System-on-Chip (SoC) platform connected directly streams coming from scanner, can perform event building, filtering, coincidence search Region-Of-Response (ROR) reconstruction by...
We present a study of the application Jagiellonian positron emission tomograph (J-PET) for registration gamma quanta from decays ortho-positronium (o-Ps). The J-PET is first tomography scanner based on organic scintillators in contrast to all current PET scanners inorganic crystals. Monte Carlo simulations show that as an axially symmetric and high acceptance can be used multi-purpose detector well suited pursue research including e.g. tests discrete symmetries addition medical imaging....
In living organisms, the positron-electron annihilation (occurring during PET imaging) proceeds in about 30% via creation of a metastable ortho-positronium atom. tissue, due to pick-off and conversion processes, over 98% ortho-positronia annihilate into two 511 keV photons. this article, we assess feasibility for reconstruction mean lifetime image based on annihilations The main objectives work include (i) estimation sensitivity total-body scanners imaging using 2γ (ii) spatial time...
J-PET is a detector optimized for registration of photons from the electron-positron annihilation via plastic scintillators where interact predominantly Compton scattering. Registration both primary and scattered enables to determinate linear polarization photon on event by basis with certain probability. Here we present quantitative results feasibility such measurements decay positronium explore physical limitations resolution determination 511 keV For scattering angles about 82 ∘ (where...
In this paper, we present a complete Data Acquisition System (DAQ) together with the readout mechanisms for J-PET tomography scanner.In general, detector chain is constructed out of Front-End Electronics (FEE) measurement devices such as Time-to-Digital or Analog-to-Digital Converters (TDCs ADCs), data collectors and storage.We have developed system capable maintaining continuous digitized without preliminary selection.Such operation mode results in up to 8 Gbps stream, therefore, it...
In this paper we estimate the time resolution of J-PET scanner built from plastic scintillators. We incorporate method signal processing using Tikhonov regularization framework and kernel density estimation method. obtain simple, closed-form analytical formulae for resolution. The proposed is validated signals registered by means single detection unit tomograph a 30 cm long scintillator strip. It shown that experimental theoretical results obtained equipped with vacuum tube photomultipliers...
There is much speculation and a modest amount of evidence that certain mesons might form quasi-bound states with nuclei to produce really exotic matter.For this be practical possibility, the interaction between meson nucleons at low energies must strong attractive production rates "healthy".The conditions for are surveyed K, η, ω, η , φ mesons.How lead then discussed in few typical cases.Though some interesting effects have been seen above-threshold data, search experimental signals these...
Abstract Purpose The time-over-threshold (TOT) technique is being used widely due to itsimplications in developing the multi-channel readouts, mainly when fast signal processing required. Using TOT technique, as a measure of energy loss instead charge integration methods, significantly reduces readout costs by combining time and information. Therefore, this approach can potentially be utilized J-PET tomograph which built from plastic scintillators characterized light signals. drawback...
Solid-state boron nuclear magnetic resonance (11B NMR) and positron annihilation lifetime spectroscopies (PALS) were used to study the molecular structure of self-healing hydrogels based on cross-linked hyperbranched polyglycidol (HbPGL) with borax at basic pH. The intensity orthopositronium allowed characterizing micro- nanostucture various thermal conditions. Stepwise changes in free volume parameters found pure HbPGL as well this polymer. However, shift phase transition temperature...
Samples of uterine leiomyomatis and normal tissues taken from patients after surgery were investigated using the Positron Annihilation Lifetime Spectroscopy (PALS).Significant differences in all PALS parameters between diseased observed.For studied patients, it was found that values free annihilation orthopositronium lifetime are larger for tumorous than healthy ones.For most intensity ortho-positronium smaller tissues.For first time, this kind studies, 3γ fraction positron determined to...
In this paper, we report a new generation of polymeric networks as potential functional material based on changes in molecular dynamics the solid state. The is obtained by free radical polymerization diacrylate derivative bearing steroid (stator) and 1,4-diethynyl-phenylene-d
The positron annihilation lifetime spectroscopy was applied to the samples of human uterine leiomyomas and normal myometrium tissues taken from selected place uterus during a surgery.The method indicated differences in values measured parameters (lifetimes intensities) between healthy diseased tissue samples.The additional measurements were performed either darkness or presence visible light which influenced free radicals present both kind and, as result, made changes o-Ps decay intensity values.
The Jagiellonian Positron Emission Tomograph (J-PET) is the first PET device built from plastic scintillators. It a multi-purpose detector designed for medical imaging and studies of properties positronium atoms in porous matter living organisms. In this article we report on commissioning J-PET view decays. We present results analysis positron lifetime measured polymer. obtained prove that capable performing simultaneous density distribution annihilation points as well spectroscopy.
We report the synthesis and structural studies of new hybrid organic–inorganic porous materials with flexible siloxane spacers different lengths bonded to polyhedral oligomeric silsesquioxane (POSS) cages. Positron annihilation lifetime spectroscopy (PALS) was used measure pore sizes two polymers. For sample 1, which has a shorter linker, free volume diameters were found be 5.32 ± 0.06 Å, 8.28 0.05 10.42 Å at 25 °C. The first value represents POSS cage, while others describe space between...
There is much speculation and a modest amount of evidence that certain mesons might form quasi-bound states with nuclei to produce really exotic matter.For this be practical possibility, the interaction between meson nucleons at low energies must strong attractive production rates "healthy".The conditions for are surveyed K, η, ω, η , φ mesons.How lead then discussed in few typical cases.Though some interesting effects have been seen above-threshold data, search experimental signals these...
Abstract Samples of healthy and neoplastic myometrial tissues were investigated using Positron Annihilation Lifetime Spectroscopy (PALS). Meaningful differences between normal diseased observed for each patient. The also clearly visible various kinds lesions in set lifetimes intensities obtained from PALS was correlated with the histopathological examinations same fragments tissues. Strong coincidence parameters findings only case a very precise correlation area both techniques. Measurements...