Results 41 to 50 of about 2,681 (192)

Use of the GATE Monte Carlo package for dosimetry applications [PDF]

open access: yes, 2005
6 pages, 3 figures - submitted to NIM A, presented by D. VisvikisInternational audienceOne of the roles for MC simulation studies is in the area of dosimetry.
Bardies, M.   +8 more
core   +4 more sources

A Monte Carlo study of organ and effective doses of cone beam computed tomography (CBCT) scans in radiotherapy [PDF]

open access: yes, 2017
Cone-beam CT (CBCT) scans utilized for image guided radiation therapy (IGRT) procedures have become an essential part of radiotherapy. The aim of this study was to assess organ and effective doses resulting from new CBCT scan protocols (head, thorax, and
Abuhaimed, Abdullah   +2 more
core   +1 more source

Evaluating the Effects of Field Size on Beam Homogeneity Coefficient in the Superficial Radiotherapy Machine Using Empirical Method and Simulation [PDF]

open access: yesIranian Journal of Medical Physics, 2012
Introduction Superficial X-ray therapy is one of the most important treatment methods in radiotherapy especially in the treatment of superficial skin lesions (Up to 300 kVp).
Hamed Babapour   +3 more
doaj   +1 more source

Soft tissue and water substitutes for megavoltage photon beams: An EGSnrc‐based evaluation [PDF]

open access: yesJournal of Applied Clinical Medical Physics, 2016
In this work, soft‐tissue equivalence of water, polystyrene, PMMA and water equivalence of polystyrene, and PMMA has been assessed for multiple megavoltage photon beams and field sizes. EGSnrc based Monte Carlo (MC) codes, BEAMnrc and DOSXYZnrc are used for the linac head modeling and the phantom dose calculations, respectively. Percentage depth doses (
Aslam, Ambreen   +4 more
openaire   +2 more sources

Determination of dosimetric dependence for effective atomic number of LDR brachytherapy seed capsule by Monte Carlo simulation

open access: yesNuclear Engineering and Technology, 2023
Brachytherapy is a special case of radiotherapy. It should be arranged according to some principles in medical radiation applications and radiation physics.
Berkay Camgöz, Dilara Tarım
doaj   +1 more source

Development and validation of a TOPAS Monte Carlo model for a 0.5 T bi‐planar Linac‐MR [PDF]

open access: yesMed Phys
Abstract Background MR‐guided radiotherapy enables real‐time imaging and adaptive treatment but may introduce magnetic field effects that alter dose deposition. Accurate dose calculation in such settings requires detailed Monte Carlo (MC) modeling. Purpose To develop and validate a detailed MC model of the 0.5 T bi‐planar Linac‐MR with an integrated ...
Gazor A   +6 more
europepmc   +2 more sources

Fast Monte Carlo Simulation for Patient-specific CT/CBCT Imaging Dose Calculation

open access: yes, 2011
Recently, X-ray imaging dose from computed tomography (CT) or cone beam CT (CBCT) scans has become a serious concern. Patient-specific imaging dose calculation has been proposed for the purpose of dose management.
Briesmeister J F   +23 more
core   +1 more source

Dosimetry characterization of $^{32}$P intravascular brachytherapy source wires using Monte Carlo codes PENELOPE and GEANT4

open access: yes, 2003
Monte Carlo calculations using the codes PENELOPE and GEANT4 have been performed to characterize the dosimetric parameters of the new 20 mm long catheter based $^{32}$P beta source manufactured by Guidant Corporation.
Agostinelli   +21 more
core   +1 more source

Accurate,robust and harmonized implementation of morpho-functional imaging in treatment planning for personalized radiotherapy [PDF]

open access: yes, 2019
In this work we present a methodology able to use harmonized PET/CT imaging in dose painting by number (DPBN) approach by means of a robust and accurate treatment planning system.
Baeza, José Antonio   +8 more
core   +2 more sources

Computation of the electron beam quality $k_{{\rm Q,Q}_0}$ factors for the NE2571, NE2571A and NE2581A thimble ionization chambers using PENELOPE

open access: yes, 2017
The quality correction factor $k_{Q,Q_{0}}$ for electron beams was calculated for three thimble ionization chambers, namely, NE2571, NE2571A and NE2581A.
Brualla, L., Erazo, F., Lallena, A. M.
core   +1 more source

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