Color flow imaging system utilizing a frequency domain wall filter
January 8, 2013. 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 ReferencesAdaptive coherent energy beam formation using phase conjugation Method and apparatus for high speed digital phased array coherent imaging system Cordic complex multiplier Method and apparatus for digital phased array imaging Coded excitation for transmission dynamic focusing of vibratory energy beam Method and apparatus for using Doppler modulation parameters for estimation of vibration amplitude Ultrasonic color flow imaging using autoregressive processing Parametric clutter elimination Patent #: 5228009 Inventors
ApplicationNo. 002000 filed on 01/08/1993US Classes:600/437, Ultrasonic600/453Doppler effect (e.g., fetal HR monitoring)ExaminersPrimary: Hayes, Gail O.Attorney, Agent or FirmInternational ClassesC06F 015/42A61B 008/00 AbstractAn ultrasonic imaging system for displaying color flow images includes a receiver which demodulates ultrasonic echo signals received by a transducer array and dynamically focuses the baseband echo signals. A color flow processor includes a frequency domain adaptive wall filter which automatically adjusts to changes in Doppler-shifted frequency and bandwidth of the wall signal components in the focused baseband echo signals after the echo signals have undergone Fourier transformation into the frequency domain. The mean Doppler-shifted frequency of the resulting filtered baseband echo signals is used to indicate velocity of moving scatterers and to control color in the displayed image.Other References
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