Figure 1.

(A) Schematic pulse sequence diagrams of the different arterial spin labeling methods, where L_A is the acceleration-selective labeling module, L_V is the velocity-selective labeling module, and C is the control module and I is imaging. (B) Schematic depiction of the radio frequency (RF) pulses and gradients (G) in the labeling modules of acceleration-selective arterial spin labeling (AccASL), velocity-selective ASL (VS-ASL), and in the control (C) condition. pCASL, pseudo-continuous ASL.