GafChromic® EBT3 films for patient specific IMRT QA using a multichannel approach

- EBT3 were evaluated for pre-treatment patient specific quality assurance.
- A calibration with 5 dose points was found to be adequate.
- Results are improved with the introduction of a reference for calibration rescaling.
- We demonstrated the multichannel approach is superior to the single channel dosimetry.
- EBT3 films turned out to be a reliable tool for IMRT patient specific QA.