Dynamic frequency feedback to multiband (MB) EPI PCASL excitation, fat saturation, and labeling RF pulse frequency can improve spatial and temporal perfusion signal-to-noise ratio (sSNR and tSNR) and cerebral blood flow (CBF) measurement reproducibility of MB-EPI PCASL. Dynamic frequency feedback helps maintain optimal labeling efficiency, achieve stable fat saturation, and correct scanner drift during MB-EPI PCASL measurements.
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