Figure 2. Perpendicular PGSE Signal Characteristics.

Signal decay in a standard PGSE sequence was acquired with gradients directed perpendicular or parallel to the spinal cord (A). Regions of interest from the white matter (WM), gray matter (GM), cerebrospinal fluid (CSF), muscle, and noise demonstrate the signal behavior of a perpendicular diffusion weighting (B). As evidenced by the image and signal plot, a perpendicular diffusion gradient at a b-value of 2000 s/mm² attenuates GM signal, and suppresses CSF and muscle signal, whereas WM signal was less attenuated.