Skip to main content
. Author manuscript; available in PMC: 2010 Apr 1.
Published in final edited form as: IEEE Trans Ultrason Ferroelectr Freq Control. 2009 Apr;56(4):715–726. doi: 10.1109/TUFFC.2009.1094

Table I.

FEA Simulation Parameters for the Two Simulations*

Em Inclusion 13 500 13 500
(Pa) Background 4500 4500
νm Inclusion 0.45 0.47
Background 0.47 0.47
k Inclusion 50 × 10 −11 25 × 10 −11
(m·s −1) Background 5 × 10 −11 25 × 10 −11
g1, τ1(s) Inclusion 0.02, 1 0.02, 5
g2, τ2(s) 0.04, 5 0.04, 25
Background 0.08, 20 0.06, 5
0.16, 100 0.12, 25
Acquisition time (s) 2000 2000
*

For both phantoms the initial elastic response indicates that the inclusion is stiffer than the background. In the second simulation, the viscoelastic properties of the inclusion and background, modeled by k and νm, and the time constants τ1 and τ2, are similar. In the second simulation, the viscoelastic properties of the inclusion and background, modeled by the permeability k, relaxation amplitudes g1 and g2, and time constants τ1 and τ2, are similar.