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. Author manuscript; available in PMC: 2011 Nov 1.
Published in final edited form as: NMR Biomed. 2011 Feb 4;24(9):1111–1118. doi: 10.1002/nbm.1666

Figure 1.

Figure 1

Pulse sequence diagram for (A) continuous arterial spin labeling (cASL) and (B) inversion recovery (IR)-cASL. Inversion pulse for the background suppression is transmitted via the brain coil on the first radiofrequency (RF) channel. The ASL is transmitted via a separate neck coil on the second RF channel. The inversion delay TI is the sum of labeling duration (LD) and post-labeling delay (PLD), half the inversion pulse length and half of the excitation pulse length. The pre-delay is used for magnetization to return to equilibrium. Image acquisition uses gradient-echo echo-planar imaging.