The rapid decline of transmit B1 ( B1+) toward the inferior brain regions and large B1+ inhomogeneity across blood feeding arteries at the labeling plane impose great challenges for high quality pseudo-continuous arterial spin labeling (PCASL) brain imaging at 7T. Recent studies at 7T have suggested that dynamically applied B1+ shimming solutions separately targeted to imaging and labeling regions can help to overcome these challenges. We implemented and evaluated the dynamic B1+ shimming approach for PCASL brain imaging at 7T, demonstrating that such an approach can greatly improve B1+ performance for blood tagging.
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