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Two-dimensional (2-D) myocardial elastography is a radio-frequency (RF)-based speckle tracking technique that uses one-dimensional (1-D) cross-correlation and recorrelation methods in a 2-D search, and can estimate and image the 2-D transmural motion and deformation of the myocardium so as to characterize the cardiac function. Based on a three-dimensional (3-D) finite-element (FE) canine left-ventricular...
High frame-rate ultrasound RF data acquisition has been proved to be critical for novel cardiovascular imaging techniques, such as high-precision myocardial elastography, pulse wave imaging (PWI), and electromechanical wave imaging (EWI). To overcome the frame-rate limitations on standard clinical ultrasound systems, we developed an automated method for multi-sector ultrasound imaging through retrospective...
In this paper, we investigate the elevational beamwidth and the extent of 3D decorrelation on 3D motion estimation of multiple short-axis slices under a previously established theoretical framework, which simulated two sequences, including passive filling and active contraction, in normal and ischemic canine finite-element (FE) left ventricular models. A 3D convolutional image formation model was...
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