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Theoretical and experimental determination of phantom scatter factors for photon fields with different radial energy variation
Umeå University, Faculty of Medicine, Department of Radiation Sciences, Radiation Physics.
Umeå University, Faculty of Medicine, Department of Radiation Sciences, Radiation Physics.
1996 (English)In: Physics in Medicine and Biology, ISSN 0031-9155, E-ISSN 1361-6560, Vol. 41, no 12, 2687-2694 p.Article in journal (Refereed) Published
Abstract [en]

The output factor used for monitor unit determination in radiotherapy can be divided into two factors: the head scatter factor and the phantom scatter factor. Theoretical and experimental phantom scatter factors have been compared for different beam qualities between 4 MV and 50 MV and field sizes from 5 cm x 5 cm to 30 cm x 30 cm. The theoretical data were obtained through a convolution method based on Monte Carlo calculated energy spectra and dose kernels. The calculations have been performed both for accelerators with a rather large energy variation within the field and for accelerators with a constant energy distribution in the field. Deviations between theoretical and experimental data were found to be less than 1%.

Place, publisher, year, edition, pages
1996. Vol. 41, no 12, 2687-2694 p.
Identifiers
URN: urn:nbn:se:umu:diva-39955DOI: 10.1088/0031-9155/41/12/008ISI: A1996VY19100008OAI: oai:DiVA.org:umu-39955DiVA: diva2:396921
Available from: 2011-02-11 Created: 2011-02-11 Last updated: 2017-12-11Bibliographically approved

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