Patent ID: 9351707
Filing Date: 2016-05-31
CPC Classification: A61B,G01S

Claim Text:
1. A method comprising: applying a first plurality of focused ultrasound pulses to biological tissue to create shear waves in the biological tissue, each of the first plurality of focused ultrasound pulses being focused at a different focal point; simultaneously transmitting a second plurality of focused ultrasound pulses into the biological tissue; after applying the first plurality of ultrasound pulses and simultaneously transmitting the second plurality of focused ultrasound pulses, receiving a plurality of ultrasound signals from the biological tissue generated in response to the second plurality of focused ultrasound pulses; determining displacement of the biological tissue based on the received plurality of ultrasound signals; detecting the shear waves in the biological tissue based on the received plurality of ultrasound signals; determining a shear wave propagation velocity based on the detected shear waves and on a square root of a ratio between a temporal second-order derivative of the displacement of the biological tissue and a spatial second-order derivative of the displacement of the biological tissue; and displaying the shear wave propagation velocity.