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.
Keywords