Abstract
A method for measurement of the bladder wall nonlinear elasticity is presented. The method is based on acoustoelasticity modeling of the bladder tissue modulus of elasticity changes at different volumetric loading levels. At each loading volume, tissue strain is obtained from the real-time images. Using acoustic radiation force, a transient Lamb wave is excited on the bladder wall and shear elasticity is obtained from 2-D Fourier analysis of tissue motion spatial-temporal dispersion maps. Experimental elasticity and strain data are then used to obtain nonlinear elasticity parameter, A, using non-linear least square optimization. The method was tested in 9 ex vivo porcine bladder samples before and after treatment with formalin. The estimated nonlinearity parameter, A, was significantly higher in the treated samples compared to intact (P < 0.0021).
| Original language | English (US) |
|---|---|
| Title of host publication | 2017 IEEE International Ultrasonics Symposium, IUS 2017 |
| Publisher | IEEE Computer Society |
| ISBN (Electronic) | 9781538633830 |
| DOIs | |
| State | Published - Oct 31 2017 |
| Event | 2017 IEEE International Ultrasonics Symposium, IUS 2017 - Washington, United States Duration: Sep 6 2017 → Sep 9 2017 |
Publication series
| Name | IEEE International Ultrasonics Symposium, IUS |
|---|---|
| ISSN (Print) | 1948-5719 |
| ISSN (Electronic) | 1948-5727 |
Other
| Other | 2017 IEEE International Ultrasonics Symposium, IUS 2017 |
|---|---|
| Country/Territory | United States |
| City | Washington |
| Period | 9/6/17 → 9/9/17 |
Bibliographical note
Publisher Copyright:© 2017 IEEE.
Keywords
- Acoustoelasticity
- Bladder
- Lamb wave
- Shear modulus
- Strain