TH-E-BRB-05: Best in Physics (Therapy) - an International Code of Practice for the Dosimetry of Small Static Photon Fields

Alfonso, Rodolfo; Andreo, Pedro; Capote-Noy, Roberto; Huq, M. Saiful; Iżewska, J.; Johansson, Jonas; Kilby, W.; Mackie, T; Meghzifene, Ahmed; Rosser, K E; Seuntjens, J; Ullrich, Wolfgang

doi:10.1118/1.4736355

Cited by 2 publications

(1 citation statement)

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“…3 Efforts are currently in progress to develop new dosimetry protocols for the dosimetry of small and composite fields, led by the IAEA in conjunction with AAPM and several other national scientific organizations and manufacturers. 4 These have already led to a proposal for a new international formalism, 3 which establishes a link to dosimetry protocols applicable to conventional radiation therapy. One of the key issues of the formalism is the determination of the necessary factors that link the reference dosimetry of conventional radiation therapy beams and that of small beams.…”

Section: Introductionmentioning

confidence: 99%

Output correction factors for nine small field detectors in 6 MV radiation therapy photon beams: A PENELOPE Monte Carlo study

2014

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The present work provides a consistent and specific set of data for the output correction factors of a broad set of detectors in a Varian Clinac iX 6 MV accelerator and contributes to improving the understanding of the physics of small photon beams. The correction factors cannot in general be neglected for any detector and, as expected, their magnitude increases with decreasing field size. Due to the reduced number of clinical accelerator types currently available, it is suggested that detector output correction factors be given specifically for linac models and field sizes, rather than for a beam quality specifier that necessarily varies with the accelerator type and field size due to the different electron spot dimensions and photon collimation systems used by each accelerator model.

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Section: Introductionmentioning

confidence: 99%

Output correction factors for nine small field detectors in 6 MV radiation therapy photon beams: A PENELOPE Monte Carlo study

2014

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Detector to detector corrections: A comprehensive experimental study of detector specific correction factors for beam output measurements for small radiotherapy beams

et al. 2014

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The results demonstrate how important it is for the appropriate corrections to be applied to give consistent and accurate measurements for a range of detectors in small beam geometry. The results further demonstrate that depending on the choice of detectors, there is a potential for large errors when effects such as volume averaging, perturbation and differences in material properties of detectors are not taken into account. As the commissioning of small fields for clinical treatment has to rely on accurate dose measurements, the authors recommend the use of detectors that require relatively little correction, such as unshielded diodes, diamond detectors or microchambers, and solid state detectors such as alanine, TLD, Al2O3:C, or scintillators.

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TH-E-BRB-05: Best in Physics (Therapy) - an International Code of Practice for the Dosimetry of Small Static Photon Fields

Cited by 2 publications

References 0 publications

Output correction factors for nine small field detectors in 6 MV radiation therapy photon beams: A PENELOPE Monte Carlo study

Output correction factors for nine small field detectors in 6 MV radiation therapy photon beams: A PENELOPE Monte Carlo study

Detector to detector corrections: A comprehensive experimental study of detector specific correction factors for beam output measurements for small radiotherapy beams

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