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AAPM TG-157 Recommendations On Beam Commissioning for Clinical Monte Carlo Dose Calculation

I Chetty

I J Chetty1*, B Faddegon2, C Ma3, (1) Henry Ford Health System, Detroit, MI, (2) UC San Francisco, San Francisco, CA, (3) Fox Chase Cancer Center, Philadelphia, PA

WE-B-213AB-2 Wednesday 9:00:00 AM - 9:55:00 AM Room: 213AB

Monte Carlo (MC) dose calculation algorithms are currently available for routine clinical planning in several commercial treatment planning systems. As noted in the AAPM Task Group Report No. 105 on issues associated with clinical implementation of MC dose algorithms, there are several fundamental differences between MC and other algorithms that need to be considered in the clinical commissioning process. The AAPM Task Group 157 was formed to provide comprehensive information on the factors relevant to source modeling and beam commissioning of MC dose algorithms. The TG-157 report was charged to provide prescriptive guidelines to medical physicists as they embark on acceptance testing and clinical commissioning of these algorithms prior to clinical use. This lecture will focus specifically on the topic of beam commissioning.

Learning Objectives:
Understand the basic components of the MC dose algorithm which need to be considered during clinical commissioning.
Understand the beam commissioning requirements associated with different beam models.
Understand the types of verification measurements necessary for accurate clinical commissioning of MC beam models and the criteria for acceptable agreement between calculations and measurements.
Understand the issues associated with accurate benchmark measurements for beam modeling, especially under circumstances of charged particle disequilibrium.

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