Le Bihan et al., Radiology, 1988
perfusion
diffusion
Fast diffusing component;
@ b-values < ~150 s/mm2
‘Perfusion’
Slow diffusing component;
@ b-values > ~150 s/mm2
‘Diffusion’
Always measure range of b-
values to capture both
The effect of b-values on DWI:
perfusion at low b-vals