Ultrasonic imaging apparatus

Details Ultrasonic imaging apparatus Ultrasonic imaging apparatus

1988-08-04

1990-06-05

Jaworski, Francis

Surgery

Truss

Pad

7386125, A61B 806

Patent

active

049305140

ABSTRACT:
An ultrasonic imaging apparatus comprises an ultrasonic transducer for emitting ultrasonic pulses at a rate frequency fr and converting an echo wave of the ultrasonic pulses into an echo signal, an orthogonal detector circuit for orthogonally detecting an echo signal provided from the ultrasonic transducer and a calculator circuit for obtaining Doppler data from the orthogonal detection signal and providing color Doppler data. The output of the calculator circuit is coupled to an interpolator circuit. When the interpolator circuit receives color Doppler data at a frequency above +fr/2 or -fr/2 from the calculator circuit, it interpolates the Doppler data according to a predetermined argorithm for excluding interpolation data corresponding to a zero region between +fr/2 and -fr/2. The color Doppler data including interpolation data is displayed as color image on the monitor.

REFERENCES:
patent: 4607642 (1986-08-01), Powers
patent: 4817617 (1989-04-01), Taheuchi et al.
patent: 4817618 (1989-04-01), Des Jardins et al.
Lee, MH, et al., "Analysis of a Scan Conversion Algorithm for a Real Time Sector Scanner" IEEE Transactions on Medical Imaging, vol. MI-5, No. 2, Jun. 1986.

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