Estimation of cumulative surface dose with FFF beams from linear accelerator and tomotherapy for SBRT of CA prostate: a phantom study

Flattening filter free (FFF) beams are widely used for the treatment of lung, liver and prostate sites i.e. in Stereotactic Body Radiotherapy (SBRT) techniques. These treatments may be delivered either with linear accelerator or tomotherapy or other modalities like Cyberknife. High dose per fraction (≥7Gy) is delivered to the isocentre of PTV. So, it is important to know the dose received at the surface of patient using Rapidarc technique in Truebeam and rotational IMRT in tomotherapy