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Abstract #0312

Free-Breathing Pediatric Imaging with Nonrigid Motion Correction and Parallel Imaging

Joseph Y. Cheng1, Martin Uecker2, Marcus T. Alley3, Shreyas S. Vasanawala3, John M. Pauly1, Michael Lustig2

1Electrical Engineering, Stanford University, Stanford, CA, United States; 2Electrical Engineering and Computer Sciences, University of California, Berkeley, CA, United States; 3Radiology, Stanford University, Stanford, CA, United States

In pediatric imaging, the patient must often be placed under deep anesthesia and put into breath-holds. This procedure adds time to prepare/finish the studies, complication to the exams, and overall risk to the patient. We developed a novel scheme to eliminate the need for deep anesthesia and breath-holds while achieving high-resolution motion-free images from a free-breathing 3D scan. First, Butterfly navigation provides motion information and data-consistency weights. Next, these weights are incorporated into a compressed-sensing & parallel-imaging reconstruction, wESPIRiT. Lastly, autofocusing uses the localized motion measurements to remove residual motion-artifacts. We demonstrate the effectiveness of our method in patient studies.