proceedings - International Tissue Elasticity Conference

ABSTRACTS
Seventh International Conference
on the Ultrasonic Measurement and Imaging
of Tissue Elasticity ©
Lake Travis, Austin, Texas, USA
October 27–30, 2008
Session TUT: Tutorials Monday, October 27 1:30P – 3:30P
096 THE CONTINUUM OF ELASTIC RESPONSES, FROM COMPRESSION TO MRE.
KJ Parker 1 .
1 University of Rochester, 203 Hopeman Building, Rochester, NY, USA.
A robust variety of approaches have been proposed in the field of elastography. The experimental
approaches span an impressive range from water jets that create surface forces to wide–area
compression, to sinusoidal or transient shear waves. Theoretical approaches to these necessarily follow
the particular conditions and excitations.
In this tutorial, we demonstrate that there is in fact a continuum of elastic behavior which relates all of
the major experimental approaches. This continuum can be viewed as a function of frequency where time
varying terms gradually increase their influence on the observed behavior. Although the commonality of
underlying responses is significant, the particular issues of detectability, resolution, contrast and inverse
solutions all shift as we move from quasi–static to high frequency excitations and responses. Examples
from different approaches will be used to illustrate the continuum of elastic behavior.
Local Wave Speed Estimators
c
E
3
● Spatial Rate Of Phase Change (Wu et al.)
● Local Frequency Estimators (Manduca et al.)
● Arrival Time McLaughlin et al.)
● Local Autocorrelation (Hoyt et al.)
● Correlation (Castañeda et al.)
Ex Vivo Prostate Results
indicates Presenter 22