Effect of transverse magnetic fields on dose distribution and RBE of photon beams: comparing PENELOPE and EGS4 Monte Carlo codes

Physics in Medicine and Biology
H NettelbeckA B Rosenfeld

Abstract

The application of a strong transverse magnetic field to a volume undergoing irradiation by a photon beam can produce localized regions of dose enhancement and dose reduction. This study uses the PENELOPE Monte Carlo code to investigate the effect of a slice of uniform transverse magnetic field on a photon beam using different magnetic field strengths and photon beam energies. The maximum and minimum dose yields obtained in the regions of dose enhancement and dose reduction are compared to those obtained with the EGS4 Monte Carlo code in a study by Li et al (2001), who investigated the effect of a slice of uniform transverse magnetic field (1 to 20 Tesla) applied to high-energy photon beams. PENELOPE simulations yielded maximum dose enhancements and dose reductions as much as 111% and 77%, respectively, where most results were within 6% of the EGS4 result. Further PENELOPE simulations were performed with the Sheikh-Bagheri and Rogers (2002) input spectra for 6, 10 and 15 MV photon beams, yielding results within 4% of those obtained with the Mohan et al (1985) spectra. Small discrepancies between a few of the EGS4 and PENELOPE results prompted an investigation into the influence of the PENELOPE elastic scattering parameters C(1)...Continue Reading

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Citations

Nov 22, 2011·International Journal of Radiation Biology·Peter LazarakisAnatoly B Rosenfeld
Oct 26, 2018·The British Journal of Radiology·Jonathan Kim MohajerGiuseppe Schettino
Oct 21, 2015·Radiation Oncology Journal·Nuri Hyun JungJungwon Kwak
May 30, 2019·International Journal of Radiation Biology·Taku InaniwaKoji Noda
Aug 25, 2015·Physics in Medicine and Biology·G Pang

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