Patent 7275439 was granted and assigned to Wisconsin Alumni Research Foundation on October, 2007 by the United States Patent and Trademark Office.
Parametric ultrasonic measurements which characterize the structure of tissue, using information from an ultrasonic signal beyond amplitude information, are obtained by combining multiple ultrasonic signals acquired at different angles, thereby reducing the variance of the calculations. Such angular compounding may be applied to detecting scatterer size, spacing, density, and attenuation.