A fast respiratory navigator (fastNAV) was developed for dynamic contrast enhanced CMR perfusion imaging by combining spatially non-selective saturation with slice-selective tip-up and slice-selective excitation pulses. A calibration scan was developed to enable the estimation of subject-specific tracking factors. Prospective motion correction using fastNAV was applied to perfusion imaging in 10 patients under free-breathing conditions. Compared to conventional perfusion imaging, fastNAV reduced the effect of respiratory motion while no difference in image quality was observed.
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