Spectral interpolation of ultrasound Doppler signal

Details Spectral interpolation of ultrasound Doppler signal Spectral interpolation of ultrasound Doppler signal

1989-11-13

1991-05-21

Jaworski, Francis

Surgery

Truss

Pad

12866105, 7386125, A61B 800

Patent

active

050166417

ABSTRACT:
A method and apparatus for producing the Doppler audio output in a medical ultrasound system. The system includes a transmitter for transmitting ultrasound into a body, a receiver for receiving and processing echoes to produce a Doppler signal, and a Doppler signal processor for converting the Doppler signals into an audio signal that in turn is converted into audible sound. The system alternates between first time intervals during which the Doppler samples are produced, and second time intervals when imaging is performed. The improvement of the invention involves producing at least one actual spectrum of the Doppler signal, based upon Doppler samples produced during one of the first time intervals. A synthetic spectrum is then produced for an adjacent second time interval, based upon the actual spectrum. The synthetic spectrum is then converted into a corresponding time domain data set, and the audio signal for the second time interval is then produced based upon the time domain data set. At least some of the points of the synthetic spectrum preferably include a randomly selected phase factor, to reduce echo artifacts and other modulation effects.

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patent: 4848354 (1989-07-01), Angelsen et al.
patent: 4930514 (1990-06-01), Baba et al.
patent: 4934373 (1990-06-01), Angelsen et al.

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