Adapting a generic BEAMnrc model of the BrainLAB m3 micro-multileaf collimator to simulate a local collimation device

Kairn, Tanya, Aland, Trent, Franich, Rick, Johnston, Peter, Kakakhel, Muhammad, Kenny, John, Knight, Richard, Langton, Christian M., Schlecht, David, Taylor, Michael, & Trapp, Jamie (2010) Adapting a generic BEAMnrc model of the BrainLAB m3 micro-multileaf collimator to simulate a local collimation device. Physics in Medicine and Biology, 55(17), N451-N463.

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This work is focussed on developing a commissioning procedure so that a Monte Carlo model, which uses BEAMnrc’s standard VARMLC component module, can be adapted to match a specific BrainLAB m3 micro-multileaf collimator (μMLC). A set of measurements are recommended, for use as a reference against which the model can be tested and optimised. These include radiochromic film measurements of dose from small and offset fields, as well as measurements of μMLC transmission and interleaf leakage. Simulations and measurements to obtain μMLC scatter factors are shown to be insensitive to relevant model parameters and are therefore not recommended, unless the output of the linear accelerator model is in doubt. Ultimately, this note provides detailed instructions for those intending to optimise a VARMLC model to match the dose delivered by their local BrainLAB m3 μMLC device.

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ID Code: 37723
Item Type: Journal Article
Refereed: Yes
Additional Information: The authors acknowledge additional funding from the Wesley Research Institute 2008/11
Keywords: radiotherapy
DOI: 10.1088/0031-9155/55/17/N01
ISSN: 0031-9155
Subjects: Australian and New Zealand Standard Research Classification > PHYSICAL SCIENCES (020000) > OTHER PHYSICAL SCIENCES (029900) > Medical Physics (029903)
Divisions: Past > QUT Faculties & Divisions > Faculty of Science and Technology
Past > Schools > Physics
Copyright Owner: Copyright 2010 Institute of Physics and Engineering in Medicine
Deposited On: 06 Oct 2010 00:00
Last Modified: 09 Apr 2014 12:21

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