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Full-Text Articles in Engineering
Monte Carlo Study Of The Energy Response And Depth Dose Water Equivalence Of The Moskin Radiation Dosimeter At Clinical Kilovoltage Photon Energies, C Lian, M Othman, D Cutajar, M Butson, Susanna Guatelli, Anatoly Rosenfeld
Monte Carlo Study Of The Energy Response And Depth Dose Water Equivalence Of The Moskin Radiation Dosimeter At Clinical Kilovoltage Photon Energies, C Lian, M Othman, D Cutajar, M Butson, Susanna Guatelli, Anatoly Rosenfeld
Susanna Guatelli
Skin dose is often the quantity of interest for radiological protection, as the skin is the organ that receives maximum dose during kilovoltage X-ray irradiations. The purpose of this study was to simulate the energy response and the depth dose water equivalence of the MOSkin radiation detector (Centre for Medical Radiation Physics (CMRP), University of Wollongong, Australia), a MOSFET-based radiation sensor with a novel packaging design, at clinical kilovoltage photon energies typically used for superficial/orthovoltage therapy and X-ray CT imaging. Monte Carlo simulations by means of the Geant4 toolkit were employed to investigate the energy response of the CMRP MOSkin …
Effect Of A Magnetic Field On The Track Structure Of Low-Energy Electrons: A Monte Carlo Study, M Bug, E Gargioni, Susanna Guatelli, S Incerti, H Rabus, R Schulte, Anatoly Rosenfeld
Effect Of A Magnetic Field On The Track Structure Of Low-Energy Electrons: A Monte Carlo Study, M Bug, E Gargioni, Susanna Guatelli, S Incerti, H Rabus, R Schulte, Anatoly Rosenfeld
Susanna Guatelli
The increasing use of MRI-guided radiation therapy evokes the necessity to investigate the potential impact of a magnetic field on the biological effectiveness of therapeutic radiation beams. While it is known that a magnetic field, applied during irradiation, can improve the macroscopic absorbed dose distribution of electrons in the tumor region, effects on the microscopic distribution of energy depositions and ionizations have not yet been investigated. An effect on the number of ionizations in a DNA segment, which is related to initial DNA damage in form of complex strand breaks, could be beneficial in radiation therapy. In this work we …
From Imaging To Dosimetry: Geant4-Based Study On The Application Of Medipix To Neutron Dosimetry, M Othman, D Marinaro, M Petasecca, S Guatelli, D Cutajar, M Lerch, Dale Prokopovich, M Reinhard, J Uher, J Jakubek, S Pospisil, Anatoly Rosenfeld
From Imaging To Dosimetry: Geant4-Based Study On The Application Of Medipix To Neutron Dosimetry, M Othman, D Marinaro, M Petasecca, S Guatelli, D Cutajar, M Lerch, Dale Prokopovich, M Reinhard, J Uher, J Jakubek, S Pospisil, Anatoly Rosenfeld
Susanna Guatelli
An application of Medipix2 using a newly developed segmented multiple thickness polyethylene (PE) converter for fast neutron detection is presented. The system has the ability to provide an energy independent response for the dose equivalent for fast neutrons. The application of weighting factors to each defined thickness of PE allows for a flattening of the response of the detector system for dosimetry applications. Six PE converter segments were applied, and their thicknesses and weighting factors were optimised to obtain the required energy independent detector response. The study performed by means of GEANT4. Its suitability for neutron dosimetry was studied with …
Monte Carlo Study Of Mosfet Packaging, Optimised For Improved Energy Response: Single Mosfet Filtration, M Othman, D Cutajar, Nicholas Hardcastle, S Guatelli, Anatoly Rosenfeld
Monte Carlo Study Of Mosfet Packaging, Optimised For Improved Energy Response: Single Mosfet Filtration, M Othman, D Cutajar, Nicholas Hardcastle, S Guatelli, Anatoly Rosenfeld
Susanna Guatelli
Monte Carlo simulations of the energy response of a conventionally packaged single metal-oxide field effect transistors (MOSFET) detector were performed with the goal of improving MOSFET energy dependence for personal accident or military dosimetry. The MOSFET detector packaging was optimised. Two different ‘drop-in’ design packages for a single MOSFET detector were modelled and optimised using the GEANT4 Monte Carlo toolkit. Absorbed photon dose simulations of the MOSFET dosemeter placed in free-air response, corresponding to the absorbed doses at depths of 0.07 mm (Dw(0.07)) and 10 mm (Dw(10)) in a water equivalent phantom of size 30 x 30 x30 cm3 for …