Detection of Shear Waves Using Pulse Echo Ultrasound with Kalman Filtering

Technology #2004-237

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Researchers
James F. Greenleaf Ph.D.
Shigao Chen Ph.D.
Randall R. Kinnick
Xiaoming Zhang Ph.D.
Managed By
Bruce R. Kline
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.