ABSTRACT
Abbreviation Meaning 1D One dimensional 2D Two dimensional 3D Three dimensional 4D Four dimensional 4DPT 4D planispheric transformation BPF Bandpass lter COTTER Combined tag tracking and strain (E)
reconstruction CWT Complex wavelet transform DWT Discrete wavelet transform ECC Entropy correlation coefcient ED End diastole ES End systole FEM Finite-element modeling FFD Free-form deformation FFT Fast Fourier transform FT Fourier transform FWHM Full-width at half-maximum HARP Harmonic phase HPF Harmonic phase ow kNNG k-Nearest neighbor graph LAX Long-axis LDA Linear discrimination analysis LMS Least mean square LV Left ventricle MAP Maximum a posteriori MI Mutual information ML Maximum likelihood MLS Moving least-square MRF Markov random eld NRR Nonrigid registration NURBS Nonuniform rational B-spline PCA Principal component analysis PCS Planispheric coordinate system PSS Prolate spheroidal system RPM Robust point matching RV Right ventricle SAX Short-axis SSD Sum-of-squared difference SVD Singular value decomposition TPS Thin-plate spline UNTETHER Unsupervised tag extraction and heart
strain (E) reconstruction
Over the past two decades, myocardial tagging with MRI has become available on most clinical scanners and has been established as the method of choice for measuring myocardial deformation (Zerhouni et al. 1988, Axel and Dougherty 1989, Fischer et al. 1993). The tagging pattern is created by spatially encoding magnetic saturation planes that deform during
the heart contraction or relaxation, thus acting as noninvasive myocardial markers. The tagline deformation pattern provides qualitative and quantitative information about the functional properties of the underlying tissue and allows for noninvasive regional analysis of the heart mechanics (Ozturk and McVeigh 2000). After the development of myocardial tagging, numerous efforts have been devoted to tagging analysis. Many techniques have been developed to detect the taglines, compute deformation measures, and estimate mechanical properties of the heart.
