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• W2334389819 abstract "In elastography, change in signal shape from tissue deformation and nonaxial tissue motion reduce correlation between the pre- and postcompression echo signals. Appropriate global temporal stretching of postcompression signals can reduce the decorrelation. Adaptive stretching performs a search for the stretch factor that maximizes the correlation between the pre- and postcompression echo signal segments at each data window location. Adaptive stretching is robust but computation intensive. In contrast, global stretching is fast but performs well only in areas where local strains are close to the applied strain. We developed a method that strikes a balance between the speed of global stretching and the performance of adaptive stretching. In this method, several strain maps are computed by performing global stretching with a range of different stretch factors. The area in each computed strain image with strain values closely corresponding to the uniform stretch factor will contain ‘good quality’ strain estimates. To produce a single elastogram at the end, we identify the strain map with the maximum correlation at each location and the strain value in that strain map at that location is chosen for the combined map. Results from data generated by finite-element simulation and phantom experiments demonstrate that the described strain estimator is significantly less susceptible to signal degradation than conventional strain estimators." @default.
• W2334389819 created "2016-06-24" @default.
• W2334389819 creator A5037350907 @default.
• W2334389819 date "2004-01-01" @default.
• W2334389819 modified "2023-10-16" @default.
• W2334389819 title "A Novel and Robust Method for Rapid Strain Estimation in Elastography" @default.
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• W2334389819 doi "https://doi.org/10.1177/016173460402600103" @default.
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