Figure 2
From: Correcting B0 inhomogeneity-induced distortions in whole-body diffusion MRI of bone
Example bone metastasis illustrating effect of B0 inhomogeneity induced distortion on DWI. In each subfigure, the slice corresponds to the horizontal slice at which the lesion is the largest (see “Methods” section). The orange bounding box was drawn 10 voxels from the lateral edge of the lesion (in DWI space) in each of the 4 directions, then overlaid on the other images. (A) DWI b = 0 s/mm2 image acquired in the forward phase encoded direction. (B) DWI b = 0 s/mm2 image acquired in the reverse phase encoded direction. (C) Estimation of the distortion within the slice. Voxel values represent the extent of displacement undergone by each voxel. Red and blue values denote displacement in the posterior and anterior direction, respectively. (D) DWI b = 0 s/mm2 image after DisCo. (E) T2-weighted image at the same slice. DisCo distortion correction.
