Fig. 2.

Cardiac-cycle dependency of pCSF dynamics captured by dDWI. (A). Three representative voxels were selected in: the pCSF (black voxel), the white matter (WM, purple voxel), and the gray matter (GM, green voxel). The top panel shows one DWI acquired during diastole. The bottom panel is T2W of the same slice, where pCSF shows a bright signal; (Panels B,D,F). The raw temporal DWI signal. (Panels C,E,G). The DWI signal after aligning to the pulse cycle. (x/y/z-dir: diffusion weighting along x/y/z direction.)