Abstract:
:The implementation of an improved model for multiple scattering into the-Voxel Monte Carlo (VMC) algorithm for fast electron dose calculation in radiation therapy is presented. The model takes into account path-length corrections (PLC) and lateral displacement in the individual electron steps. The extraction of the scattering power from the available computed-tomography images is discussed. It is shown that with the improved modeling of multiple electron scattering, the VMC algorithm is comparable in accuracy with PRESTA, the electron transport algorithm of EGS4. The problem of double counting of contributions from atomic electrons to the scattering power is considered and a simple solution is found.
journal_name
Med Physjournal_title
Medical physicsauthors
Kawrakow Idoi
10.1118/1.597933subject
Has Abstractpub_date
1997-04-01 00:00:00pages
505-17issue
4eissn
0094-2405issn
2473-4209journal_volume
24pub_type
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