Detection of Shear Waves Using Pulse Echo Ultrasound with Kalman Filtering

Technology #2004-237

Questions about this technology? Ask a Technology Manager

Download Printable PDF

James F. Greenleaf Ph.D.
Xiaoming Zhang Ph.D.
Randall R. Kinnick
Shigao Chen Ph.D.
Managed By
Barb J. Keller
Patent Protection
US Patent Pending
US Patent Pending

The present invention detects the harmonic motion of vibro-acoustography using pulse echo ultrasound and several signal processing methods. The invention estimates the amplitude and phase of the motion at a desired location within a tissue region with a high sensitivity. The tissue harmonic motion generated by the ultrasound radiation force of vibro-acoustography is presented as oscillatory Doppler shift in repetitive ultrasound pulse echoes. The amplitude and phase of the motion represented in the echoes are estimated by several methods including a method using the Kalman filter for minimizing estimation error.