Addendum to the AAPMˈs TG‐51 protocol for clinical reference dosimetry of high‐energy photon beams
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Open Access
- 12 March 2014
- journal article
- other
- Published by Wiley in Medical Physics
- Vol. 41 (4), 041501
- https://doi.org/10.1118/1.4866223
Abstract
An addendum to the AAPMˈs TG‐51 protocol for the determination of absorbed dose to water in megavoltage photon beams is presented. This addendum continues the procedure laid out in TG‐51 but newkQ data for photon beams, based on Monte Carlo simulations, are presented and recommendations are given to improve the accuracy and consistency of the protocolˈs implementation. The components of the uncertainty budget in determining absorbed dose to water at the reference point are introduced and the magnitude of each component discussed. Finally, the consistency of experimental determination ofND,w coefficients is discussed. It is expected that the implementation of this addendum will be straightforward, assuming that the user is already familiar with TG‐51. The changes introduced by this report are generally minor, although new recommendations could result in procedural changes for individual users. It is expected that the effort on the medical physicistˈs part to implement this addendum will not be significant and could be done as part of the annual linac calibration.Keywords
This publication has 85 references indexed in Scilit:
- Consistency in reference radiotherapy dosimetry: resolution of an apparent conundrum when60Co is the reference quality for charged-particle and photon beamsPhysics in Medicine & Biology, 2013
- Temperature dependence of cavity ionization chamber responseMetrologia, 2013
- The effect of air cavity size in cylindrical ionization chambers on the measurements in high-energy radiotherapy photon beams—an experimental studyPhysics in Medicine & Biology, 2012
- The accuracy of EGSnrc, Geant4 and PENELOPE Monte Carlo systems for the simulation of electron scatter in external beam radiotherapyPhysics in Medicine & Biology, 2009
- Relationship between and stopping‐power ratios for flattening filter free accelerators: A Monte Carlo studyMedical Physics, 2008
- Solid water phantom heat conduction: Heating and cooling ratesJournal of Medical Physics, 2008
- Report of the AAPM Task Group No. 105: Issues associated with clinical implementation of Monte Carlo‐based photon and electron external beam treatment planningMedical Physics, 2007
- Absorbed dose to water reference dosimetry using solid phantoms in the context of absorbed-dose protocolsMedical Physics, 2005
- Variations in response to radiation of a nylon‐walled ionization chamber induced by humidity changesMedical Physics, 1985
- Calibration instrumentation used by the AAPM Radiological Physics CenterMedical Physics, 1976