Physica Medica
Papers 5955
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#1Serena Monti (National Research Council)H-Index: 14
#2Giuseppe Pontillo (Information Technology University)H-Index: 1
Last. Giuseppe Palma (National Research Council)H-Index: 14
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Abstract null null Purpose null To introduce a class of fast 3D quantitative MRI (qMRI) schemes (RESUMEN, for null null null null N null = null 1 null , null … null , null 4 null null null ) that allow for a thorough characterization of microstructural properties of brain tissues. null null null Methods null An arbitrary multi-echo GRE acquisition optimized for quantitative susceptibility mapping (QSM) is complemented with an appropriate low flip-angle GRE sequence drawn from four possible choic...
#1Hideyuki MizunoH-Index: 12
#2Wataru YamashitaH-Index: 3
Last. Shigekazu FukudaH-Index: 16
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PURPOSE We experimentally determined the radiophotoluminescent glass dosimeter (RPLD) dose responses for TomoTherapy, CyberKnife, and flattening-filter-free (FFF) linear accelerator (linac) outputs for dosimetry audits in Japan. METHODS A custom-made solid phantom with a narrow central-axis spacing of three RPLD elements was used for output measurement to minimise the dose-gradient effect of the non-flattening filter beams. For RPLD dose estimation, we used the ISO 22127 formalism. Additional un...
#1Veronica Tessaro (National University of Rosario)
#2Benoit Gervais (UNICAEN: University of Caen Lower Normandy)H-Index: 19
Last. M E Galassi (National University of Rosario)H-Index: 15
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Abstract null null Purpose null To develop a particle transport code to compute w-values and stopping power of swift ions in liquid water and gases of interest for reference dosimetry in hadrontherapy. To analyze the relevance of inelastic and post-collisional processes considered. null null null Methods null The Monte Carlo code MDM was extended to the case of swift ion impact on liquid water (MDM-Ion). Relativistic corrections in the inelastic cross sections and the post-collisional Auger emis...
#1Wook-Geun Shin (Seoul National University Hospital)
#2José Ramos-Méndez (UCSF: University of California, San Francisco)H-Index: 10
Last. Sebastien Incerti (CNRS: Centre national de la recherche scientifique)H-Index: 45
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This paper demonstrates the impact of the pre-chemical stage, especially the dissociation scheme and the associated probabilities, on water radiolysis simulation using the Geant4-DNA Monte Carlo track structure simulation toolkit. The models and parameters provided by TRACs have been collected and implemented into Geant4-DNA. In order to evaluate their influence on water radiolysis simulation, the radiochemical yields (G-values) are evaluated as a function of time and LET using the "chem6" Geant...
#2F. Dorn (University Hospital Bonn)
Last. Patrick Vogel (University of Würzburg)H-Index: 13
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Abstract null null Purpose null Magnetic Particle Imaging (MPI) is a new, background- and radiation-free tomographic imaging method that enables near real-time imaging of superparamagnetic iron-oxide nanoparticles (SPIONs) with high temporal and spatial resolution. This phantom study aims to investigate the potential of MPI for visualization of the stent lumen in intracranial flow diverters (FD). null null null Methods null Nitinol FD of different dimensions (outer diameter: 3.5 mm, 4.0 mm, 5.5 ...
#1Pablo Mínguez (UPV/EHU: University of the Basque Country)H-Index: 5
#2Jose GenolláH-Index: 8
Last. Emilia RodeñoH-Index: 2
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PURPOSE To study the dependency of the effective half-life on the administered activity and the correlation between the time-integrated activity and the remnant uptake at 2d and 7d in patients treated for DTC with 1.11 GBq, 3.7 GBq or 5.55 GBq of 131I-NaI. METHODS Ninety-two patients undergoing total thyroidectomy and lymph node removal were included. If cancer had not spread to lymph nodes, patients received 1.11 GBq of 131I-NaI when the lesion maximal diameter was smaller than 4 cm, and 3.7 GB...
#1Kristin Karlsson (Karolinska University Hospital)H-Index: 6
#2Ingmar Lax (Karolinska University Hospital)H-Index: 39
Last. Gavin Poludniowski (Karolinska University Hospital)H-Index: 16
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Abstract null null Introduction null Dose-response relationships for local control of lung tumours treated with stereotactic body radiotherapy (SBRT) have proved ambiguous, however, these have been based on the prescribed or planned dose. Delivered dose to the target may be a better predictor for local control. In this study, the probability of the delivered minimum dose to the clinical target volume (CTV) in relation to the prescribed dose was estimated for a cohort of patients, considering geo...
#1Jan Klohs (UZH: University of Zurich)H-Index: 19
#2Ann M. Hirt (ETH Zurich)H-Index: 40
Abstract null null Purpose null Several magnetic resonance imaging (MRI) techniques exploit the difference in magnetic susceptibilities between tissues, but systematic measurements of tissue susceptibility are lacking. Furthermore, there is the question as to whether chemical fixation that is used for ex vivo MRI studies, affects the magnetic properties of the tissue. Here, we determined the magnetic susceptibility and water content of fresh and chemically fixed mouse tissue. null null null Meth...
Abstract null null Replacing moving mechanics in computed tomography (CT) and digital breast tomosynthesis (DBT) has inspired numerous projects to develop alternative X-ray sources. While less suitable for CT, DBT is a viable target application for the multi-X-ray-source array tube suggested in Becker, A.E., et al. (2020): A prototype Multi-X-ray-source array (MXA) for digital breast tomosynthesis. Physics in Medicine & Biology, 65(23), 235033. The proposed prototype MXA tube comprises rotating ...
#1Una O’ConnorH-Index: 4
#2Eleftheria Carinou (Greek Atomic Energy Commission)H-Index: 19
Last. O. Hupe (German National Metrology Institute)H-Index: 9
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Occupational radiation doses from interventional procedures have the potential to be relatively high. The requirement to optimise these doses encourages the use of electronic or active personal dosimeters (APDs) which are now increasingly used in hospitals. They are typically used in tandem with a routine passive dosimetry monitoring programme, with APDs used for real-time readings, for training purposes and when new imaging technology is introduced. However, there are limitations when using APD...
Top fields of study
Imaging phantom
Medical physics
Nuclear medicine
Computer science