The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Aug. 31, 2010
Filed:
Oct. 01, 2004
Yi Zheng, Sartell, MN (US);
Wei Tan, St. Cloud, MN (US);
James Fowler Greenleaf, Rochester, MN (US);
Shigao Chen, Rochester, MN (US);
Yi Zheng, Sartell, MN (US);
Wei Tan, St. Cloud, MN (US);
James Fowler Greenleaf, Rochester, MN (US);
Shigao Chen, Rochester, MN (US);
Mayo Foundation for Medical Education and Research, Rochester, MN (US);
Abstract
Harmonic motion is produced in a subject using vibro-acoustography. An ultrasonic imaging system repetitively interrogates the subject and the Doppler shift in the reflected echo signals is analyzed to measure the phase and amplitude of harmonic motion produced in the subject at different prescribed frequencies. Shear wave propagation through the subject is determined from this information and mechanical properties related to 'stiffness' of the subject are determined. A Kalman filter is employed in the phase and amplitude measurement to extract the harmonic motion information from background noise.