### Abstract

The phantom scatter correction factor S(p), of megavoltage photon beams can be accurately described using a three-Gaussian fit. The model leads to six parameters, with which S(p),(r) is described as a smooth function of the field radius r for beam qualities in the range from ^{60}Co up to 25 MV. The parameters allow S(p), values to be calculated at intermediate beam energies and for any field shape. Calculated S(p)(X, Y) values for rectangular fields (X, Y) can be subsequently used as reference values to compare with measured S(p),(X, Y) values, for example when appraising a new beam.

Original language | English |
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Pages (from-to) | 577-585 |

Number of pages | 9 |

Journal | Physics in Medicine and Biology |

Volume | 43 |

Issue number | 3 |

DOIs | |

Publication status | Published - 31 Mar 1998 |

## Cite this

*Physics in Medicine and Biology*,

*43*(3), 577-585. https://doi.org/10.1088/0031-9155/43/3/009