Cerebral Perfusion Measurements in Elderly with Hypertension Using Arterial Spin Labeling - Fig 1

<p>a) Schematic overview of the two-compartment perfusion model explains the FEAST technique, adapted from Wang <i>et al</i>. [<a href="http://www.plosone.org/article/info:doi/10.1371/journal.pone.0133717#pone.0133717.ref006" target="_blank">6</a>] b) shows raw perfusion-weighted maps and c) perfusion maps after post-processing for a representative subject. Note that the signal intensity is lower after crushing (ΔM') than before (ΔM) and that crushed CBF (CBF_crushed) is weighted toward the micro-vascular CBF whereas non-crushed CBF (CBF_non-crushed) is weighted toward both micro- and macro-vascular CBF. ATT = arterial transit time, ∝ = proportional to.