Fig. 3.
(a) Example of a baseline HF-MRI ROI image. (b) Followup HF-MRI of the same subject. (c) Difference image after linear registration using WB-RIGID. (d) Difference image after linear registration using ROI-RIGID. (e) Difference image after WB-RIGID and 2D deformable registration. (f) Difference image after ROI-RIGID and 2D deformable registration. White indicates zero difference and better alignment. All images are shown in the halfway space. Arrow indicates an area where ROI-RIGID, 2D provides better alignment than WB-RIGID, 2D.
