In simultaneous multi-slice imaging technique, the kernels used for unfolding the collapsed slices are estimated using integrated or separated reference scans, which require additional scan time. In this work a slice-GRAPPA calibration method utilizing the pre-scan data is developed to save the time for acquiring training data. This method has been applied to slice accelerated PROPELLER sequence. The result shows that the proposed method can correctly fit the SG kernel and reconstruct the slice undersampled images.
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