Method for determining the velocity-time spectrum of blood flow
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Sep 2, 1997
Grant Date -
N/A
app pub date -
Jun 7, 1995
filing date -
Jun 14, 1994
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
Method for determining the velocity-time spectrum of blood flow in a living body by means of an ultrasonic pulsed wave Doppler system, comprising: sequential transmission of pulsed ultrasonic waves and receiving a corresponding sequence of echo signals, sampling the received echo signals at one or more predetermined time delays after transmitted ultrasonic pulses, and processing said sequence of echo signal samples by frequency spectrum analysis to obtain a blood velocity spectrum comprising a number of velocity components within a range of expected blood velocity values, and repeating said processing a plurality of times to obtain a velocity-time spectrum for substantially real-time display. For each velocity component in said blood velocity spectrum the received echo signals are sampled with subsequent increase or decrease in said predetermined delay after pulse transmission according to the change in round-trip time of the ultrasonic pulses reflected from blood moving with a velocity corresponding to each said velocity component. The resulting sequence of signal samples is processed to obtain said velocity component.
First Claim
Family
International Classification(s)
Cited Art Landscape
Patent Citation Ranking
Recipient Email Address
Recipient Email Address
Comment
Recipient Email Address
Add to Portfolio(s)
To add this patent to one, or more, of your portfolios, simply click the add button.
This Patent is in these Portfolios:
Add to additional portfolios:
Last Refreshed On:
Changes done successfully