Fig. 1
From: A Nomogram to predict parotid gland overdose in head and neck IMRT
Total cumulated dose estimation by deformable image registration in four steps. Step 1: The weekly delivered doses were calculated from the weekly computed tomography scans (CTs). Step 2: A deformable image registration was applied to the weekly doses according to the deformation field between the weekly and planning CT (CT0). Step 3: The propagated dose distributions were totaled to compute the cumulated dose for the CT0. Step 4: The planned dose was compared with the estimated cumulated dose