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Rapid 3D LV Strain Reconstruction from Tagged Cardiac MR Images

X. Deng, T. S. Denney Jr Auburn University, Auburn, Alabama, United States Synopsis We present a rapid unsupervised method, called rapid UNTETHER, for computing three-dimensional (3D) myocardial strain from planar tagged cardiac MR images. Our method consisted of two steps: tag line tracking and strain reconstruction. The tag line tracking algorithm is based on a spatial tag detector and a modified 1D harmonic phase (HARP) π isocontour tracking algorithm. 3D myocardial strains are reconstructed using a cylindrical B-spline deformation model. Experimental results from ten human imaging studies (5 normal volunteers, 5 patients) demonstrate that our method is reproducible and can reconstruct 3D end-systolic circumferential shortening strain from tagged images accurately in 90 seconds.