title: Inconsistencies in egspp (the EGSnrc C++ class library) and in the SLAB module of BEAMnrc.
abstract: In April 2005, a geometry package to implement almost arbitrary geometries was added to the EGSnrc code system: egspp (Kawrakow 2005 NRCC Report PIRS-899, Kawrakow and Rogers 2006 NRCC Report PIRS-701). During the use of this geometry package, some inconsistencies were found which might lead to dose values that are wrong by up to a factor of 100. In addition, discrepancies up to a factor of 3 were found between egspp and BEAMnrc when using the SLAB module (Rogers et al 2007 NRCC Report PIRS-509). In this letter, the measures to overcome these inconsistencies are described.
authors.forename: R
authors.initials: R
authors.lastname: Behrens
mesh_terms: D009010:Monte Carlo Method; D011879:Radiotherapy Dosage; D012107:Research Design; D012984:Software