Measuring and testing – Volume or rate of flow – By measuring vibrations or acoustic energy
Patent
1992-05-02
1994-02-22
Goldstein, Herbert
Measuring and testing
Volume or rate of flow
By measuring vibrations or acoustic energy
12866108, G01F 100
Patent
active
052877531
ABSTRACT:
A technique for continuously determining and displaying the peak and mean velocities of spectral Doppler information is disclosed. Received spectral Doppler data is examined over a predetermined period to determine the signal to noise ratio of the Doppler signals. Individual instantaneous measurements, or lines, of Doppler spectral information are analyzed in the power versus frequency domain to compare the line information against a noise threshold determined by the signal to noise ratio. The maximum frequency signal component is thereby identified as the peak velocity of the spectral line. Mean velocity is calculated as an intensity weighted mean about the maximum power frequency of the line data. The identified peak and mean velocities are displayed in contrasting colors or shades on a continuously updated and displayed flow velocity versus time spectral display.
REFERENCES:
patent: 4848354 (1989-07-01), Augelsen et al.
patent: 5065764 (1991-11-01), Nakamura et al.
Doppler Ultrasound by D. H. Evans et al., publ. by John Wiley & Sons, (1989) at pp. 166-184 and 266-269.
"Performance of The Mean Frequency Doppler Mudulator", by R. W. Gill, publ. in Ultrasound in Med. & Biol., vol. 5 at pp. 237-247 (1979).
"Power-Spectrum Centriod Detection For Doppler Systems Applications" by L. Gerzberg and J. D. Meindl, publ. in Ultrasonic Imaging, vol. 2 at pp. 232-261 (1980).
"Comparison Of Four Digital Maximum Frequency Estimators For Doppler Ultrasound" by L. Y. L. Mo et al. publ. in Ultrasound in Med & Biol., vol. 14, No. 5 at pp. 355-363 (1988).
"The Square Foot of Frequency Power-Spectrum Centroid Detector: System Considerations, Implementation, And Performance" by L. Gerzberg & J. D. Meindl, pub. in Ultrasonic Imaging, vol. 2 at pp. 262-289 (1980).
Mo, Larry Y. L., L. Yun, and R. Cobbold, Comparison of four digital maximum frequency estimators for Doppler ultrasound; Ultrasound in Med. & Biol., 14, 335-363, 1988.
Peterson Roy B.
Powrie, Jr. Charles W.
Routh Helen F.
Advanced Technology Laboratories, Inc.
Biegel R.
Brinton Yorks, Jr. W.
Goldstein Herbert
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