T2*w-MRI is routinely used for the diagnosis of hemorrhage and stroke in the Emergency Department, where time is critical and motion is often a concern. However, conventional T2*w-GRE have long scan times, and often suffer from motion artifacts. Parallel imaging and compressed sensing reduce the scan time, but are still prone to motion. ssEPI is fast and motion-insensitive, but suffers from severe geometric distortions. msEPI alleviates the distortion artifacts, but at the cost of increased motion sensitivity. This work presents an msEPI with a navigator echo for rapid motion-corrected T2*w-MRI. Volunteer and patient studies have demonstrated its robustness.
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