Surgery – Truss – Pad
Patent
1993-07-30
1995-07-11
Manuel, George
Surgery
Truss
Pad
A61B 800
Patent
active
054311691
ABSTRACT:
The ultrasonic diagnosing apparatus including an ultrasonic probe, an ultrasonic wave transmitting and receiving unit for transmitting ultrasonic pulses toward a living body and receiving ultrasonic waves reflected by the living body to produce an echo signal, and a signal processing circuit for processing the echo signal such that a Doppler frequency representing a relative movement between the ultrasonic probe and living tissues is detected and a velocity of a blood stream which is free from the influence of the relative movement is detected on the basis of the Doppler frequency due to the relative movement between the ultrasonic probe and the living tissues. In a power spectrum distribution, the Doppler frequency can be detected as a peak frequency at which the magnitude of the power spectrum becomes maximum. In one embodiment of the ultrasonic diagnosing apparatus, the frequency axis of the power distribution is shifted such that the Doppler frequency becomes zero, and finally a Doppler frequency due to the blood stream is detected from a power spectrum component outside a cut-off frequency range. In a second embodiment, a first Doppler frequency due to the blood stream is detected from a signal component which is obtained by MTI filters and auto-correlation circuits, a second Doppler frequency due to the relative movement between the ultrasonic probe and the living tissues is detected from a signal component which is obtained by the auto-correlation circuits, and then a velocity of the blood stream is detected from a difference between the first and second Doppler frequencies.
REFERENCES:
patent: 4961427 (1990-10-01), Namekawa
patent: 5103827 (1992-04-01), Smith
patent: 5170792 (1992-12-01), Sturgill et al.
patent: 5186177 (1993-02-01), O'Donnell et al.
patent: 5188113 (1993-02-01), Sato et al.
patent: 5211169 (1993-05-01), Freeland
patent: 5269308 (1993-12-01), Hagiwara et al.
Manuel George
Olympus Optical Co,. Ltd.
LandOfFree
Ultrasonic diagnosing apparatus does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Ultrasonic diagnosing apparatus, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Ultrasonic diagnosing apparatus will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-496862