Nonlinear acoustics in diagnostic ultrasound.

@article{Duck2002NonlinearAI,
  title={Nonlinear acoustics in diagnostic ultrasound.},
  author={Francis A Duck},
  journal={Ultrasound in medicine & biology},
  year={2002},
  volume={28 1},
  pages={1-18}
}
The propagation of ultrasonic waves is nonlinear. Phenomena associated with the propagation of diagnostic ultrasound pulses cannot be predicted using linear assumptions alone. These include a progressive distortion in waveform, the generation of frequency harmonics and acoustic shocks, excess deposition of energy and acoustic saturation. These effects occur most strongly when ultrasound propagates within liquids with comparatively low acoustic attenuation, such as water, amniotic fluid or urine… CONTINUE READING

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