Figure 1
From: Helical tomotherapy for single and multiple liver tumours
The comparison of isodose distributions of planned target volume (PTV) and organs at risk (OARs) in an axial plane for one patient in group 1 using the helical tomotherapy (HT) planning system versus step-and-shoot intensity-modulated radiotherapy (SaS-IMRT). DVH: Dose volume histograms; PTV = Planning target volume; OAR = Organ at risk