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- W2891446960 abstract "Across the varieties of waves that have been studied in physics, it is well established that group velocities can be significantly greater than or less than phase velocities measured within comparable frequency bands, depending on the particular mechanisms involved. The distinction between group and phase velocities is important in elastography, because diagnoses are made based on shear wave speed estimations from a variety of techniques. We review the general definitions of group and phase velocity and examine their specific relations within an important general class of rheological models. For the class of tissues and materials exhibiting power law dispersion, group velocity is significantly greater than phase velocity, and simple expressions are shown to interrelate the commonly measured parameters. Examples are given from phantoms and tissues." @default.
- W2891446960 created "2018-09-27" @default.
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- W2891446960 date "2018-09-05" @default.
- W2891446960 modified "2023-10-17" @default.
- W2891446960 title "Group versus Phase Velocity of Shear Waves in Soft Tissues" @default.
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- W2891446960 doi "https://doi.org/10.1177/0161734618796217" @default.
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