PMID: 8971973Dec 1, 1996Paper

10 MV x-ray zero-area phantom scatter correction factors (Sp) obtained using three extrapolation methods

Physics in Medicine and Biology
A Iwasaki

Abstract

Three sets of 10 MV x-ray zero-area phantom scatter correction factors (Sp) have been obtained using three methods. The three methods are all based on the Bjärngard-Petti extrapolation principle. The three sets of data assume lateral CPE (charged particle equilibrium) for the primary absorbed dose. Using the most reliable set of data, a set of 10 MV x-ray SMRs (scatter-maximum ratios) is produced and parameterized. With respect to the zero-area Sp correction factor at a depth of 2.5 cm, the parameterized expression gives Sp (0; 2.5) = 0.931 and a Rice-Chin Monte Carlo simulation gives Sp (0; 2.5) = 0.927. The former is only 0.4% larger than the latter.

References

Jan 1, 1988·Physics in Medicine and Biology·B E Bjärngard, P L Petti
Nov 1, 1986·Medical Physics·F M KhanF C Deibel
Mar 1, 1980·Medical Physics·W F HansonM Peterson
Jun 1, 1994·Medical Physics·S ZefkiliJ C Rosenwald

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