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In 4-D echocardiographic (4DE) strain estimation using speckle tracking, large interframe strains resulting from moderate volumetric frame rates can cause significant peak hopping artifacts. Conventional correlation filters applied spatially at constant lags are effective for reducing peak hopping in low strain cases, but can exacerbate false peak artifacts when large strains are present. Alternatively,...
In 4-D echocardiography (4DE), displacement estimates obtained solely from multi-dimensional speckle tracking can exhibit large variances and peak hopping, making it challenging to accurately calculate myocardial strains. 3-D phase-sensitive speckle tracking can produce sensitive estimates along the axial direction, but typically provides poorer estimates in orthogonal directions and at tissue boundaries...
In myocardial strain imaging using speckle tracking, large interframe strains can cause significant peak hopping. An iterative, or multi-pass, process for speckle tracking, using displacement estimates from the previous pass as an initial guess for a subsequent pass, can improve displacement accuracy if initial guesses are close to the true correlation coefficient peak. Different peak-hopping patterns...
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