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Abstract #4176

An Efficient EPI Pulse Sequence Module for Active Marker Motion Correction Acquisition for EPI Scans

Erik B. Beall1, Mark J. Lowe1

1Radiology, Cleveland Clinic, Cleveland, OH, United States

Head motion is a huge problem in many advanced MRI sequences. Previous reports of microcoil-based active marker motion correction are truly prospective but impose reductions in SNR and time-efficiency in the main sequence due the separate excitation. Anatomic sequences are largely insensitive to motion, but functional, perfusion and diffusion-weighted EPI presents intractable problems if there is more than minimal head motion. EPI in most uses requires a fat saturation pulse, and we present a method to use fat saturation with active markers to remove the SNR and time penalties and demonstrate proof-of-principle in human data.