Figure 5From: Dosimetric comparison between coplanar and non coplanar field radiotherapy for ethmoid sinus cancerHomogeneity index (HI) for each patient in the coplanar field CF (grey) and non coplanar field NCF (black) technique. HI is defined as the difference between D1 and D99% divided by the prescribed dose. A perfect homogeneity would be reached with a zero index.Back to article page