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. Author manuscript; available in PMC: 2019 Jan 1.
Published in final edited form as: Magn Reson Med. 2017 Feb 15;79(1):394–400. doi: 10.1002/mrm.26643

Figure 1.

Figure 1

(a) Illustration of CSD-BS scheme: Slice-dependent pre-modulation pulses with SMS excitation modulates background signal in brain prior to the pCASL labeling train. Two spatially non-selective inversion pulses are placed within the post labeling delay to avoid the interruption of labeling module. SMS-EPI images are acquired sequentially with a 45 ms readout. (b): A two-slice example to demonstrate the trajectory of background signal. Longitudinal signal in each group of slices (blue and green) is modulated separately to reach the nulling point prior to readout of each respectively slice group.