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Monte Carlo evaluation of collapsed-cone convolution calculations in head and neck radiotherapy treatment plans

Crowe, Scott, Kairn, Tanya, Trapp, Jamie, & Fielding, Andrew L. (2012) Monte Carlo evaluation of collapsed-cone convolution calculations in head and neck radiotherapy treatment plans. In Long, Mian (Ed.) World Congress on Medical Physics and Biomedical Engineering 2012. Springer, Beijing, China, pp. 1803-1806.

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    Abstract

    The presence of air and bone interfaces makes the dose distribution for head and neck cancer treatments difficult to accurately predict. This study compared planning system dose calculations using the collapsed-cone convolution algorithm with EGSnrcMonte Carlo simulation results obtained using the Monte Carlo DICOMToolKit software, for one oropharynx, two paranasal sinus and three nodal treatment plans. The difference between median doses obtained from the treatment planning and Monte Carlo calculations was found to be greatest in two bilateral treatments: 4.8%for a retropharyngeal node irradiation and 6.7% for an ethmoid paranasal sinus treatment. These deviations in median dose were smaller for two unilateral treatments: 0.8% for an infraclavicular node irradiation and 2.8% for a cervical node treatment. Examination of isodose distributions indicated that the largest deviations between Monte Carlo simulation and collapsed-cone convolution calculations were seen in the bilateral treatments, where the increase in calculated dose beyond air cavities was most significant.

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    ID Code: 52705
    Item Type: Book Chapter
    Keywords: radiation therapy, treatment planning, dosimetry, monte carlo
    ISBN: 9783642293047
    Subjects: Australian and New Zealand Standard Research Classification > PHYSICAL SCIENCES (020000) > OTHER PHYSICAL SCIENCES (029900) > Medical Physics (029903)
    Divisions: Current > Schools > School of Chemistry, Physics & Mechanical Engineering
    Current > QUT Faculties and Divisions > Science & Engineering Faculty
    Funding:
    Copyright Owner: Copyright 2012 Springer
    Copyright Statement: The original publication is available at SpringerLink http://www.springerlink.com
    Deposited On: 25 Jul 2012 09:43
    Last Modified: 11 Apr 2014 03:30

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