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Abstract #0456

3D Self-Navigator Acquisition for Translational and Nonrigid Motion Correction in Multiphase Coronary MR Angiography

Kristin Quah1, Srivathsan P. Koundinyan1, Frank Ong1, Mario O. Malavé1, and Dwight Nishimura1
1Stanford University, Stanford, CA, United States

A whole-heart multiphase coronary angiography method has been developed that extracts a 3D navigator image every heartbeat from the 3D cones high-resolution imaging data. Such 3D self-navigators (sNAVs) enable direct beat-to-beat respiratory motion tracking of the heart for translational and nonrigid correction. 3D sNAVs are derived from the inner k-space region of phyllotaxis-ordered 3D cones interleaves collected over multiple cardiac phases. A multiscale low-rank method is used for reconstruction.

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