Consequences of the spectral response of an a-Si EPID and implications for dosimetric calibration.

@article{Kirkby2005ConsequencesOT,
  title={Consequences of the spectral response of an a-Si EPID and implications for dosimetric calibration.},
  author={Charles Kirkby and Ronald Sloboda},
  journal={Medical physics},
  year={2005},
  volume={32 8},
  pages={2649-58}
}
One of the attractive features of amorphous silicon electronic portal imaging devices (a-Si EPIDs) as dosimetric tools is that for open fields they are known to exhibit a generally linear relation between pixel value and incident energy fluence as measured by an ion chamber. It has also been established that a-Si EPIDs incorporating high atomic number phosphors such as Gd2O2S:Tb exhibit a disproportionately large response to low-energy (<1 MeV) photons. The present work examines the… CONTINUE READING