Abstract
Harmonic phase magnetic resonance imaging (HARP) is a new technique formeasuring the motion of the left ventricle of the heart. HARP usesmagnetic resonance tagging, Fourier filtering and special processingalgorithms to calculate key indices of myocardial motion includingEulerian and Lagrangian strain. This paper presents several new methodsfor visualizing myocardial motion based on HARP. Quantities that arecomputed and visualized include motion grids, velocity fields, strainrates, pathlines, tracked Eulerian strain, and contraction angle. Thecomputations are fast and fully automated and have the potential forclinical application.
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