Modeling the extrafocal radiation and monitor chamber backscatter for photon beam dose calculation.

@article{Jiang2001ModelingTE,
  title={Modeling the extrafocal radiation and monitor chamber backscatter for photon beam dose calculation.},
  author={Shu Jiang and Arthur L. Boyer and C M Ma},
  journal={Medical physics},
  year={2001},
  volume={28 1},
  pages={55-66}
}
A simple analytical approach has been developed to model extrafocal radiation and monitor chamber backscatter for clinical photon beams. Model parameters for both the extrafocal source and monitor chamber backscatter are determined simultaneously using conventional measured data, i.e., in-air output factors for square and rectangular fields defined by the photon jaws. The model has been applied to 6 MV and 15 MV photon beams produced by a Varian Clinac 2300C/D accelerator. Contributions to the… CONTINUE READING

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