Fig. 3
From: Concept for quantifying the dose from image guided radiotherapy
Symbols represent the imaging dose as a function of the distance from the PTV for a 2 Gy fraction. The lines denote the borders between the different dose categories. The category I/II and the category II/III-transition are represented by the solid and the dashed/dotted lines, respectively. The solid line represents the 2 % dose variation of linac output, the dotted line the variation of treatment techniques and the dashed line the variation between machine types. Planar imaging modalities are depicted in a), CT-imaging in b) and scout view and live imaging in c)