Browsing by author "Verhaegen, Frank"
Now showing items 1-8 of 8
-
A method of simulating dynamic multileaf collimators using Monte Carlo techniques for intensity-modulated radiation therapy
(IOP PUBLISHING LTD, 2001-09)A method of modelling the dynamic motion of multileaf collimators (MLCs) for intensity-modulated radiation therapy (IMRT) was developed and implemented into the Monte Carlo simulation. The simulation of the dynamic MLCs ... -
Dose perturbations at high-Z interfaces in kilovoltage photon beams: comparison with Monte Carlo simulations and measurements
(PERGAMON-ELSEVIER SCIENCE LTD, 2002-06)Dose perturbations, backscatter dose perturbation factor (BSDF), and forward dose perturbation factor (FDPF) near high-Z material interfaces have been reported to be intense and significant in kilovoltage photon beams. ... -
Evaluation of the EGSnrc Monte Carlo code for interface dosimetry near high-Z media exposed to kilovolt and Co-60 photons
(IOP PUBLISHING LTD, 2002-05-21)High atomic number (Z) heterogeneities in tissue exposed to photons with energies of up to about 1 MeV can cause significant dose perturbations in their immediate vicinity. The recently released Monte Carlo (MC) code EGSnrc ... -
Experimental p(wall) and p(cel) correction factors for ionization chambers in low-energy clinical proton bearras
(IOP PUBLISHING LTD, 2001-04)Current dosimetry protocols for clinical protons using ionization chambers do not take into account ionization chamber-dependent perturbation correction factors. In the present investigation, the relative response of 17 ... -
Incorporating dynamic collimator motion in Monte Carlo simulations: an application in modelling a dynamic wedge
(IOP PUBLISHING LTD, 2001-02)In radiation therapy, new treatment modalities employing dynamic collimation and intensity modulation increase the complexity of dose calculation because a new dimension, time, has to be incorporated into the traditional ... -
Interface dosimetry: measurements and Monte Carlo simulations of low-energy photon beams
(PERGAMON-ELSEVIER SCIENCE LTD, 2001-06)A comparison of measured and simulated dose perturbations at high-Z interfaces with Monte Carlo (MC) codes, EGS4, MCNP4B, and PENELOPE, having varied algorithms is presented. The measured dose perturbations strongly depend ... -
Microdosimetric characterisation of 28 kV(p) Mo/Mo, Rh/Rh, Rh/Al, W/Rh and Mo/Rh mammography X ray spectra
(NUCLEAR TECHNOLOGY PUBL, 2002)Microdosimetric characteristics of 28 kV(p), mammography X ray spectra were studied for several target/added filtration combinations (Mo/Mo, Rh/Rh, Rh/Al, W/Rh, Mo/Rh). Monte Carlo techniques were used to model X ray ... -
Quantifying effects of lead shielding in electron beams: a Monte Carlo study
(IOP PUBLISHING LTD, 2001-03)Lead shielding in contact with the patient’s skin is often encountered in radiotherapy with electron beams. The influence of the lead shielding on dose distributions in the patient cannot fully be assessed using modern ...