Fig. 4
From: Prospects for online adaptive radiation therapy (ART) for head and neck cancer
a Highlights the inter- and intrafractional anatomical shifts juxtaposed for parameters 1–8. The classification parameter classifies the anatomical parameters 1–8 in the order of their legend for the planning-CT versus CBCT1 (A = interfractional) and for CBCT2 versus CBCT1 (B = intrafractional). b Plot of difference between the absolute values of the interfractional and the intrafractional anatomical shifts for each fraction. The classification parameter classifies the anatomical parameters 1–8 in the order of their legend