219 citations · 1.5k across the 45 of their papers we have counts for
46 papers
Synchronisation and calibration of the 24-modules J-PET prototype with 300~mm axial field of view
P. Moskal, T. Bednarski, Sz. Niedzwiecki +36
Research conducted in the framework of the J-PET project aims to develop a cost-effective total-body positron emission tomography scanner. As a first step on the way to construct a…
Multichannel FPGA based MVT system for high precision time (20~ps~RMS) and charge measurement
M. Pałka, P. Strzempek, G. Korcyl +29
In this article it is presented an FPGA based ulti-oltage hreshold (MVT) system which allows of sampling fast signals ( ns rising and falling edge) in both voltage an…
Calculation of time resolution of the J-PET tomograph using the Kernel Density Estimation
L. Raczyński, W. Wiślicki, W. Krzemień +31
In this paper we estimate the time resolution of the J-PET scanner built from plastic scintillators. We incorporate the method of signal processing using the Tikhonov regularizatio…
Measurement of gamma quantum interaction point in plastic scintillator with WLS strips
J. Smyrski, D. Alfs, T. Bednarski +29
We demonstrated the feasibility of measuring the axial coordinate of a gamma quantum interaction point in a plastic scintillator bar via the detection of scintillation photons esca…
A feasibility study of ortho-positronium decays measurement with the J-PET scanner based on plastic scintillators
D. Kamińska, A. Gajos, E. Czerwiński +26
We present a study of the application of the Jagiellonian Positron Emission Tomograph (J-PET) for the registration of gamma quanta from decays of ortho-positronium (o-Ps). The J-PE…
Time resolution of the plastic scintillator strips with matrix photomultiplier readout for J-PET tomograph
P. Moskal, O. Rundel, D. Alfs +27
Recent tests of a single module of the Jagiellonian Positron Emission Tomography system (J-PET) consisting of 30 cm long plastic scintillator strips have proven its applicability f…
Trilateration-based reconstruction of ortho-positronium decays into three photons with the J-PET detector
A. Gajos, D. Kamińska, E. Czerwiński +28
This work reports on a new reconstruction algorithm allowing to reconstruct the decays of ortho-positronium atoms into three photons using the places and times of photons recorded…
Scatter fraction of the J-PET tomography scanner
P. Kowalski, W. Wiślicki, L. Raczyński +24
A novel Positron Emission Tomography system, based on plastic scintillators, is being developed by the J-PET collaboration. In this article we present the simulation results of the…
Sampling FEE and Trigger-less DAQ for the J-PET Scanner
G. Korcyl, D. Alfs, T. Bednarski +29
In this paper, we present a complete Data Acquisition System (DAQ) together with the readout mechanisms for the J-PET tomography scanner. In general detector readout chain is const…
Beam profile investigation of the new collimator system for the J-PET detector
E. Kubicz, M. Silarski, A. Wieczorek +23
Jagiellonian Positron Emission Tomograph (J-PET) is a multi-purpose detector which will be used for search for discrete symmetries violations in the decays of positronium atoms and…
Potential of the J-PET detector for studies of discrete symmetries in decays of positronium atom - a purely leptonic system
P. Moskal, D. Alfs, T. Bednarski +24
The Jagiellonian Positron Emission Tomograph (J-PET) was constructed as a prototype of the cost-effective scanner for the simultaneous metabolic imaging of the whole human body. Be…
Searches for discrete symmetries violation in ortho-positronium decay using the J-PET detector
D. Kamińska, T. Bednarski, P. Białas +24
In this paper we present prospects for using the J-PET detector to search for discrete symmetries violations in a purely leptonic system of the positronium atom. We discuss tests o…
Studies of unicellular micro-organisms Saccharomyces cerevisiae by means of Positron Annihilation Lifetime Spectroscopy
E. Kubicz, B. Jasińska, B. Zgardzińska +26
Results of Positron Annihilation Lifetime Spectroscopy (PALS) and microscopic studies on simple microorganisms: brewing yeasts are presented. Lifetime of ortho - positronium (o-Ps)…
Reconstruction of hit-time and hit-position of annihilation quanta in the J-PET detector using the Mahalanobis distance
N. G. Sharma, M. Silarski, T. Bednarski +24
The J-PET detector being developed at Jagiellonian University, is a Positron Emission Tomograph composed of the long strips of polymer scintillators. At the same time it is a detec…
PALS investigations of free volumes thermal expansion of J-PET plastic scintillator synthesized in polystyrene matrix
A. Wieczorek, B. Zgardzińska, B. Jasińska +25
The polystyrene dopped with 2,5-diphenyloxazole as a primary fluor and 2-(4-styrylphenyl)benzoxazole as a wavelength shifter, prepared as a plastic scintillator was investigated us…
Processing optimization with parallel computing for the J-PET tomography scanner
W. Krzemień, M. Bała, T. Bednarski +27
The Jagiellonian-PET (J-PET) collaboration is developing a prototype TOF-PET detector based on long polymer scintillators. This novel approach exploits the excellent time propertie…
Application of the Compress Sensing Theory for Improvement of the TOF Resolution in a Novel J-PET Instrument
L. Raczynski, P. Moskal, P. Kowalski +24
Nowadays, in Positron Emission Tomography (PET) systems, a Time of Flight information is used to improve the image reconstruction process. In Time of Flight PET (TOF-PET), fast det…
3D PET image reconstruction based on Maximum Likelihood Estimation Method (MLEM) algorithm
Artur Słomski, Zbigniew Rudy, Tomasz Bednarski +23
Positron emission tomographs (PET) do not measure an image directly. Instead, they measure at the boundary of the field-of-view (FOV) of PET tomograph a sinogram that consists of m…
Plastic scintillators for positron emission tomography obtained by the bulk polymerization method
Łukasz Kapłon, Andrzej Kochanowski, Marcin Molenda +24
This paper describes three methods regarding the production of plastic scintillators. One method appears to be suitable for the manufacturing of plastic scintillator, revealing pro…
Multiple scattering and accidental coincidences in the J-PET detector simulated using GATE package
P. Kowalski, P. Moskal, W. Wiślicki +28
Novel Positron Emission Tomography system, based on plastic scintillators, is developed by the J-PET collaboration. In order to optimize geometrical configuration of built device,…
Analysis framework for the J-PET scanner
W. Krzemień, A. Gajos, A. Gruntowski +28
J-PET analysis framework is a flexible, lightweight, ROOT-based software package which provides the tools to develop reconstruction and calibration procedures for PET tomography. I…
Hit time and hit position reconstruction in the J-PET detector based on a library of averaged model signals
P. Moskal, N. G. Sharma, M. Silarski +28
In this article we present a novel method of hit time and hit position reconstruction in long scintillator detectors. We take advantage of the fact that for this kind of detectors…
GPU accelerated image reconstruction in a two-strip J-PET tomograph
P. Białas, J. Kowal, A. Strzelecki +26
We present a fast GPU implementation of the image reconstruction routine, for a novel two strip PET detector that relies solely on the time of flight measurements.
A pilot study of the novel J-PET plastic scintillator with 2-(4-styrylphenyl)benzoxazole as a wavelength shifter
A. Wieczorek, P. Moskal, Sz. Niedźwiecki +30
For the first time a molecule of 2-(4-styrylphenyl)benzoxazole containing benzoxazole and stilbene groups is applied as a scintillator dopant acting as a wavelength shifter. In thi…