In medical physics, GPU-based Monte Carlo simulations (MCS) have been proposed for computational gains. However, they remain limited to specific applications and are not easily generalized.
GGEMS (GPU Geant4-based Monte Carlo Simulations) is advanced MCS software that uses OpenCL. Entirely written in C++, its software architecture allows flexibility and generality for numerous applications...
The super-resolution (SR) techniques are often used in the up-scaling process to add-in details that are not present in the original low-resolution image. In radiation therapy the SR can be applied to enhance the quality of medical images used in treatment planning. The Dose3D detector measuring spatial dose distribution [1], the dedicated set of ML algorithms for SR has been proposed to...
We present one of the first images for an in vivo scan of a human patient, measured by the modular Jagiellonian positron emission tomographic (J-PET) prototype, which records 511-keV annihilation photons via Compton scattering in plastic scintillators [1]. The original reconstruction algorithm is adapted from the maximum likelihood expectation maximisation (MLEM), with the realistic J-PET...
Positronium Imaging (PI) has become one of the most prospective branch of Positron Emission Tomography. During the PI measurement two classes of events are required: double-coincidence events originated from pair of back-to-back annihilation photons and triple-coincidence events comprised with three photons, i.e, two annihilation photons and one additional prompt photon. The standard...
Positron Emission Tomography (PET) is a widely employed medical imaging technique that uses radiotracers to visualise various metabolic processes. PET functions by detecting gamma rays resulting from the decay of the radiotracer in the patient body. The acquired data are then utilised to reconstruct an image representing the initial radiotracer distribution. However, numerous effects,...
Assessing radiation doses to internal organs is crucial in evaluating the risks and benefits of diagnostic and therapeutic nuclear medicine procedures, such as PET, for patients. Respiratory motion causes significant displacement of internal organs, affecting the absorbed dose in cases of external r adiation exposure. In this study, our focus was on determining the role of respiratory motion...
