System identification and control of a miniature external mechanical vibration device towards clinical ultrasound shear wave elastography

An acoustic radiation force (ARF) is commonly used to generate shear waves in ultrasound systems for shear wave elastography (SWE). However, ARF requires complex hardware that produces thermal stresses in tissues and electronic components. External mechanical vibration (EMV) is less power-exhaustive compared to ARF. Additionally, EMV-based shear waves have been shown to produce larger, local displacements in comparison to ARF-based shear waves which is beneficial for imaging deeper tissues. EMV provides the opportunity for the development of a low-cost, compact, and efficient alternative to ARF-based SWE systems. A miniature EMV SWE system consisting of up to two vibrating voice coil actuators (VCAs) attached to a commercial ultrasound probe was previously designed and developed. The vibration of the VCAs was synchronized with the commercial ultrasound system to induce shear waves, replacing the ARF.

Name thesis:degree_name

Master

Department dc:contributor.department

Massachusetts Institute of Technology. Department of Mechanical Engineering

Grantor dc:publisher

Massachusetts Institute of Technology

Year dc:date.issued

2020

Author dc:creator

• Chavez, Yasmin.

Advisor dc:contributor.advisor

• Brian W. Anthony.

• Mechanical Engineering.

Statement dc:rights

• MIT theses may be protected by copyright. Please reuse MIT thesis content according to the MIT Libraries Permissions Policy, which is available through the URL provided.

Licence dc:rights.uri

• http://dspace.mit.edu/handle/1721.1/7582

Language dc:language.iso

eng

Handle dc:identifier.uri

https://hdl.handle.net/1721.1/127155

OAI identifier oai:identifier

oai:dspace.mit.edu:1721.1/127155