Fig. 2.

(A-Top): pCT of a patient in axial, sagittal and coronal view. Esophagus contour propagated from week 3 MRI (green) to the pCT aligned well to the planning ground-truth contour (red color wash) and the esophagus boundary was clear after registration. (A-Bottom): Registered week 3 MRI to the pCT image using the same transformation that propagated the contour in the top row. (B) Scatter plot showing correlation between local net volume change of esophagus calculated using Jacobian integral and ground-truth volume change of esophagus. Dashed line is identity line. (C) Bland-Altman plot illustrating the agreement between the Jacobian integral and ground-truth volume change of esophagus. Solid blue line shows the mean difference. (For interpretation of the references to colour in this figure legend, the reader is referred to the web version of this article.)