Improving the energy response of external beam therapy (EBT) GafChromic^TM dosimetry films at low energies (≤100 keV)

Abstract

The energy response of films in the energy range <100 keV can be improved by adjusting the active layer chemical composition. Removing bromine eliminated the over response at about 40 keV. The under response at energies ≤ 30 keV is improved by adding 7% Al to the active layer in the latest commercial EBT3 film models.