Spectral estimators in elastography.

@article{Konofagou2000SpectralEI,
  title={Spectral estimators in elastography.},
  author={Elisa E. Konofagou and Thomas Varghese and Jonathan Ophir},
  journal={Ultrasonics},
  year={2000},
  volume={38 1-8},
  pages={412-6}
}
Like velocity, strain induces a time delay and a time scaling to the received signal. Elastography typically uses time delay techniques to indirectly (i.e. via the displacement estimate) measure tissue strain induced by an applied compression, and considers time scaling as a source of distortion. More recently, we have shown that the time scaling factor can also be spectrally estimated and used as a direct measure of strain. Strain causes a Doppler-like frequency shift and a change in bandwidth… CONTINUE READING