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Abstract #0293

Prospective Motion Correction Using an MR-Tracking Tetrahedron for Intra-Cavitary MRI

Lei Qin1, Ehud J. Schmidt1, W. Scott Hoge1, Juan Santos2, Clare Tempany-Afdhal1, Kim Butts-Pauly3, Charles L. Dumoulin4

1Radiology, Harvard Medical School, Boston, MA, United States; 2Electrical Engineering, Stanford University, Stanford, CA, United States; 3Radiology, Stanford University, Stanford, CA, United States; 4Radiology, Cincinnati Children's Hospita, Cincinnati, OH, United States

Intra-cavitary imaging coils have been developed to achieve higher spatial resolution. However, they suffer more severely from motion artifacts since both the anatomy and the coil are moving while image acquisition occurs. We propose integrating a Tetrahedron-shaped active MR-tracking coil into an intra-cavitary imaging coil for motion detection, and to perform prospective motion (rotation and translation) corrections in real-time, so that the entire image can be acquired in a static frame of reference. Experiments show significant image quality improvements for both in-plane and through-plane motion correction.