4D-angiography exploiting pseudo-continuous arterial spin labeling at 7T suffers from specific absorption rate constraints, low B1+ efficiency for the labeling and B1+ inhomogeneity in the readout. In this work, we propose a B1+-phase shim trading B1+ homogeneity and transmit efficiency for the labeling combined with a dynamic transmission 2-spoke excitation readout. In volunteer measurements, the proposed approach outperformed the standard circular polarized mode by an increased vessel intensity and more vessel conspicuity.
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