Non Invasive Estimation of Tissue Viscoelasticity from Broad-band Mechanical Excitation Using High Intensity Focused Ultrasound
Jiming Zhang 1 , Pei-Herng Hor 1 , and Raja Muthupillai 2
Physcs and Texas Center for
Superconductivity, University of Houston, Houston, TX,
and Interventional Radiology, St. Luke's Medical Center,
Houston, TX, United States
A high-intensity focused ultrasound system was used to
cause a highly localized, broad-band mechanical
excitation within a tissue mimicking phantom. We
describe a frequency domain approach to resolve the
resulting tissue displacement at various frequencies. A
rheological model (Zener) fit the experimentally
determined shear wave velocity dispersion well in the
frequency range of 90-200 Hz.
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