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Simulating oblique incident irradiation using the BEAMnrc Monte Carlo code

Downes, P. and Spezi, Emiliano 2009. Simulating oblique incident irradiation using the BEAMnrc Monte Carlo code. Physics in Medicine and Biology 54 (7) , N93-N100. 10.1088/0031-9155/54/7/N02

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A new source for the simulation of oblique incident irradiation has been developed for the BEAMnrc Monte Carlo code. In this work, we describe a method for the simulation of any component that is rotated at some angle relative to the central axis of the modelled radiation unit. The performance of the new BEAMnrc source was validated against experimental measurements. The comparison with ion chamber data showed very good agreement between experiments and calculation for a number of oblique irradiation angles ranging from 0 degrees to 30 degrees . The routine was also cross-validated, in geometrically equivalent conditions, against a different radiation source available in the DOSXYZnrc code. The test showed excellent consistency between the two routines. The new radiation source can be particularly useful for the Monte Carlo simulation of radiation units in which the radiation beam is tilted with respect to the unit's central axis. To highlight this, a modern cone-beam CT unit is modelled using this new source and validated against measurement.

Item Type: Article
Date Type: Publication
Status: Published
Schools: Engineering
Subjects: Q Science > QC Physics
R Medicine > R Medicine (General)
T Technology > TA Engineering (General). Civil engineering (General)
Publisher: Institute of Physics
ISSN: 0031-9155
Last Modified: 04 Jun 2017 08:04

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