Three-dimensional variable-focus liquid lens using acoustic radiation force

2011 ◽  
Author(s):  
Daisuke Koyama ◽  
Ryoichi Isago ◽  
Kentaro Nakamura
Keyword(s):  
Acoustic Radiation ◽  
Three Dimensional ◽  
Radiation Force ◽  
Acoustic Radiation Force ◽  
Liquid Lens ◽  
Dimensional Variable ◽  
Variable Focus

scholarly journals Compact, high-speed variable-focus liquid lens using acoustic radiation force

2010 ◽  
Vol 18 (24) ◽  
pp. 25158 ◽  
Author(s):  
Daisuke Koyama ◽  
Ryoichi Isago ◽  
Kentaro Nakamura
Keyword(s):  
High Speed ◽  
Acoustic Radiation ◽  
Radiation Force ◽  
Acoustic Radiation Force ◽  
Liquid Lens ◽  
Variable Focus

Numerical computation of acoustic radiation force in two and three dimensional resonators

2013 ◽  
Vol 134 (5) ◽  
pp. 4226-4226
Author(s):  
Ari Mercado ◽  
Brian McCarthy ◽  
Ben Ross-Johnsrud ◽  
Jason Dionne ◽  
Bart Lipkens
Keyword(s):  
Numerical Computation ◽  
Acoustic Radiation ◽  
Three Dimensional ◽  
Radiation Force ◽  
Acoustic Radiation Force

Liquid lens using acoustic radiation force

2011 ◽  
Vol 58 (3) ◽  
pp. 596-602 ◽  
Author(s):  
Daisuke Koyama ◽  
Ryoichi Isago ◽  
Kentaro Nakamura
Keyword(s):  
Acoustic Radiation ◽  
Radiation Force ◽  
Acoustic Radiation Force ◽  
Liquid Lens

Modeling Dynamic Responses of Viscoelastic Heterogeneous Soft Tissues to Step Acoustic Radiation Force

2013 ◽  
Author(s):  
Xiaodong Zhao ◽  
Assimina A. Pelegri
Keyword(s):  
Soft Tissue ◽  
Dynamic Response ◽  
Soft Tissues ◽  
Acoustic Radiation ◽  
Three Dimensional ◽  
Radiation Force ◽  
Element Model ◽  
Acoustic Radiation Force ◽  
Degree Of Freedom ◽  
Dynamic Responses

The responses of soft tissue under acoustic radiation force excitations are used to image tissue mechanical properties for soft tissue discrimination and detection of breast tumors. The soft tissue viscoelasticy has been interrogated by step acoustic radiation force excitations. The corresponding induced time-dependent creep displacement is used to reconstruct soft tissue viscoelasticity or to estimate viscosity and elasticity contrast of the inclusion to background. The acoustic radiation force is highly localized in a small excitation region; and, one degree-of-freedom and homogenous assumptions are generally made to the analysis. However, these simplifying assumptions limit the accuracy of these methods. In this paper, a finite element model was built to demonstrate the effect of the dynamic response of viscoelastic heterogeneous soft tissue to step acoustic radiation force. Factors affecting the dynamic response of soft tissue were first investigated with the homogenous model, and the corresponding estimation quality based on the one degree-of-freedom model was evaluated. Then, the dynamic response of soft tissue with inclusion and different elasticity and viscocity for the tissue and the inclusion was studied. The results suggest that in order to improve the estimate of soft tissue viscoelasticity the heterogenenous nature of the tissue and its three dimensional geometry should be accounted in the model.

Sign in / Sign up

Export Citation Format

Share Document