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Abstract #3823

Differential Energy: A K-Space PPI Reconstruction Optimization Metric

Thomas A. Depew1, Qing-San Xiang1, 2

1Physics & Astronomy, University of BC, Vancouver, BC, Canada; 2Radiology, University of BC, Vancouver, BC, Canada

Partial Parallel Imaging (PPI) is a popular choice for performing accelerated acquisitions in MRI. PPI algorithms that use calibration and fitting to recreate the omitted k-space signals are candidates for using the Differential Energy (ED) as a metric for optimizing reconstruction parameters. ED provides a measure of the accuracy of the reconstruction and can be calculated without a fully sampled reference image. The ED reliably predicted optimal RW for a regionally tuned GRAPPA algorithm (r-GRAPPA).