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Abstract #3664

Retrospective Estimation of 3D Respiratory Motion Vectors in Coronary MRI

Alan Christopher O'Connor1, Mehdi Hedjazi Moghari1, Peng Hu1, Dana C. Peters1, Warren J. Manning1, Reza Nezafat1, Roger Ware Brockett2

1Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, MA, United States; 2SEAS, Harvard University, Cambridge, MA, United States

Navigator correction methods were developed to increase the gating window size possible for free-breathing cardiac MRI and consequently reduce scan time. These methods typically rely on a generic scale-factor between measured diaphragm motion and heart motion. We present a novel scheme for estimating patient-, direction-, and coil-specific motion vectors directly from the scan data to correct for phase errors caused by respiratory motion of the heart.