Fig. 5

Magnitude images of the dual echo MRI data of initial (column 1) and final (column 2) bladder states for three subjects (S) used to generate subject-induced susceptibility distortion maps. Corresponding B0 maps with off-resonances converted to distortions are shown in columns 3 and 4, respectively. Clinical target volumes (CTVs, prostate + proximal 1 cm of seminal vesicles) are delineated. Distortion difference maps (difference ∆X) are shown in the final column (final minus initial) with the distortion scale shown in millimeters