Noninvasive vibration measurement system and method for measuring amplitude of vibration of tissue in an object being investigated
Patent 4819649 Issued on April 11, 1989. Estimated Expiration Date: 
November 3, 2006. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.
November 3, 2006. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent ReferencesMeasurement method and system utilizing ultrasonic wave Method for measuring physical properties of material Ultrasonic non-linear parameter measuring system System and method for measuring sound velocity of tissue in an object being investigated Patent #: 4653505 InventorsAssigneeApplicationNo. 06/926452 filed on 11/03/1986US Classes:600/438, Used as an indicator of another parameter (e.g., temperature, pressure, viscosity)73/624, Having separate sonic transmitter and receiver73/625Having plural sonic type transmitter or receiver transducersExaminersPrimary: Jaworski, Francis J.Assistant: Manuel, George Attorney, Agent or FirmInternational ClassesG01N 29/04 (20060101)A61B 8/08 (20060101) A61B 5/12 (20060101) G01N 29/11 (20060101) G01S 15/00 (20060101) G01S 15/50 (20060101) AbstractA system and method for measuring the acoustically induced vibrations within a living organism. The object is ensonified to set it into low frequency vibration. A continuous wave beam of ultrasonic energy is transmitted along one path and focused at the tissue to be investigated. A focused transducer receives the reflected beam along a second axis such that the intersection of the transmitted and received beams define a small, concentrated region positioned at the object under investigation. The received beam is phase modulated by the amplitude of vibration of the object producing sidebands whose amplitude can be ratioed to the amplitude of the high frequency peak to determine the absolute amplitude of the low frequency vibration.Other References
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