Theoretical and experimental determination of phantom scatter factors for photon fields with different radial energy variation
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
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.
IdentifiersURN: urn:nbn:se:umu:diva-39955DOI: 10.1088/0031-9155/41/12/008ISI: A1996VY19100008OAI: oai:DiVA.org:umu-39955DiVA: diva2:396921