Related Experiment Video
Updated: Mar 27, 2026

Microparticle Manipulation by Standing Surface Acoustic Waves with Dual-frequency Excitations
Published on: August 21, 2018
Phase Aberration and Attenuation Effects on Acoustic Radiation Force-Based Shear Wave Generation
Tissue attenuation significantly impacts shear wave elasticity imaging (SWEI) more than phase aberration. Lowering ultrasound frequency aids shear wave generation in vivo.
Area of Science:
- Biomedical Ultrasound
- Medical Imaging
- Acoustic Radiation Force
Background:
- Shear wave elasticity imaging (SWEI) uses acoustic radiation force to measure tissue elasticity.
- Phase aberration and tissue attenuation challenge in vivo SWEI by disrupting shear wave generation.
Purpose of the Study:
- To investigate the impact of phase aberration and attenuation on ultrasound focusing for shear wave generation.
- To analyze effects on shear wave amplitude, speed, center frequency, and bandwidth.
Main Methods:
- Experimental models using swine belly tissue to induce phase aberration and attenuation.
- Ultrasound beam simulations (FOCUS) and shear wave simulations (FEM) to isolate effects.
- Varying ultrasound frequency from 3.0 to 4.5 MHz.
Main Results:
- Tissue samples reduced acoustic pressure and shear wave amplitude by 40%-90%.
- High correlation (r=0.99, 0.97) observed between acoustic intensity and shear wave displacement.
- Tissue attenuation had a greater negative effect on shear wave generation than phase aberration.
Conclusions:
- Tissue attenuation is a more significant factor than phase aberration in degrading shear wave generation.
- Reducing ultrasound frequency can improve shear wave generation by maintaining beam focus under aberrating and attenuating conditions.
More Related Videos
10:14Fabrication and Operation of Acoustofluidic Devices Supporting Bulk Acoustic Standing Waves for Sheathless Focusing of Particles
Published on: March 6, 2016
12:26Fabrication, Operation and Flow Visualization in Surface-acoustic-wave-driven Acoustic-counterflow Microfluidics
Published on: August 27, 2013
Related Concept Videos
Sound Waves: Interference
Interference and Diffraction
Interference: Path Lengths
Two special sources may be considered when they are in phase. This can be easily achieved by feeding the two sources from the same source. An example would be synchronizing the two speakers by feeding them with the same source, such as the sound waves produced by a tuning fork. This setup ensures that the two sources have the same frequency and are...
Propagation of Waves
Consider a scenario where a wave propagates from a string of low linear mass density to a string of high linear mass density. In such a case, the reflected wave is out of phase with respect to the incident wave, however the...
Sound as Pressure Waves
The pressure fluctuation depends on the difference in displacements between the successive points in the...
Shear on the Horizontal Face of a Beam Element