Figure 5
From: Computational methods for visualizing and measuring verapamil efficacy for cerebral vasospasm
Graphical representation of perfusion parameters from a select patient illustrating changes in perfusion parameters after administration of verapamil. Each set of 4 images, observed clockwise from top-left represent the pre-AP, pre-LAT, post-LAT, and post-AP for a single perfusion parameter. (A) Arrival Time. (B) Time-to-Peak. (C) Mean-Transit Time. (D) Time-to-Drain. (E) Cerebral Blood Volume. (F) Cerebral Blood Flow. Clinicians are provided with these parameter maps to graphically visualize changes in AT, TTP, MTT, TTD, CBV, and CBF. To provide accurate comparisons between studies, each set is normalized and color coded over the same scale. By convention, red indicates increased perfusion \((\downarrow AT, \downarrow TTP, \downarrow TTD, \downarrow MTT, \uparrow CBF, \uparrow CBV)\). Black and blue indicate decreased perfusion \((\uparrow AT, \uparrow TTP, \uparrow TTD,\uparrow MTT, \downarrow CBV, \downarrow CBF)\).
