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Abstract #3685

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

1 Physcs and Texas Center for Superconductivity, University of Houston, Houston, TX, United States, 2 Diagnostic 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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