Fig. 2

Example of image registration between the verification scan (orange) and the original planning scan (blue) for (a) Patient #4, who had a large posture error and breast error, (b) Patient #11, who had good posture setup but a large breast error, and (c) Patient #7, who developed breast edema during the treatment. The blue or orange color only appears in regions of misalignment. The solid yellow contour represents the CTVbreast contour on the original scan and the dashed yellow contour represents the CTVbreast on the verification scan