Method and means for attaining ultrasonic attenuation by vector sample averaging
Patent 4475397 Issued on October 9, 1984. Estimated Expiration Date: 
July 19, 2002. 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.
July 19, 2002. 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 References 3309914 Ultrasonic imaging method and apparatus Reference voltage generation means for controlling a display Patent #: 4361043 InventorsAssigneeApplicationNo. 06/399845 filed on 07/19/1982US Classes:73/599Attenuation measurementExaminersPrimary: Ciarlante, Anthony V.Attorney, Agent or FirmInternational ClassG01H 3/00 (20060101)AbstractThe ultrasonic wave attenuation of tissue undergoing examination is determined by directing a plurality of ultrasonic signals into the tissue, receiving and detecting a measure (e.g. zero crossings) of the frequencies of ultrasonic signals reflected from various depths in said tissue, and averaging the measures of the frequencies for each of the various depths. Attenuation of the tissue between a first depth and a second depth is determined from a comparison of the averaged measure at the first depth and the averaged measure at the second depth.Other References
| |
