Experimental determination of 32P dose backscatter factors at and near soft-tissue boundaries.

@article{Nunes1993ExperimentalDO,
  title={Experimental determination of 32P dose backscatter factors at and near soft-tissue boundaries.},
  author={J Nunes and William Vernon Prestwich and C. S. Kwok},
  journal={Medical physics},
  year={1993},
  volume={20 1},
  pages={
          223-31
        }
}
Beta-ray dose backscatter factors with respect to soft tissue were measured using an extrapolation chamber. The beta-ray dose backscatter factor is a measure of the change effected in absorbed dose to a soft-tissue medium when part of the medium is replaced by a material other than soft tissue (i.e., a scatterer); the source is located at the boundary between the two media. The dependencies of backscatter factor on scatterer atomic number and on source geometry are investigated, and the… CONTINUE READING