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.