Surgery – Diagnostic testing – Detecting nuclear – electromagnetic – or ultrasonic radiation
Patent
1998-07-06
1999-09-07
Jaworski, Francis J.
Surgery
Diagnostic testing
Detecting nuclear, electromagnetic, or ultrasonic radiation
7386125, A61B 806
Patent
active
059479035
ABSTRACT:
A method for estimating a flow in an observation plane from the Doppler velocity distribution in the observation plane. A Doppler flow function is found from the Doppler velocity distribution by linear integration. A flow rate passing through a path perpendicular to a beam direction is found from the Doppler velocity distribution, and a Doppler flow range function representing a variation of this flow rate in the beam direction is calculated. The Doppler flow range function is separated into a linear boundary flow range function which is a two-dimensional component and a planar boundary flow range function which is a three-dimensional component. The planar boundary flow range function is approximated by a stepwise quantized planar boundary flow range function which varies in unit flow rate, and sink points and source points (simple sources) are determined based on a step position of this quantized planar boundary flow range function. A simple source flow function representing a three-dimensional inflow/outflow to and from the observation plane is calculated from a distribution of simple sources. A smoothed simple source flow function is subtracted from the Doppler flow function so as to calculate a planar flow function. The planar flow function and simple source flow function are combined so as to estimate a planar flow based on a contour line of this combined function.
REFERENCES:
patent: 3906791 (1975-09-01), Lynnworth
patent: 5010528 (1991-04-01), Ohtsuki et al.
patent: 5201313 (1993-04-01), Katkura
patent: 5390548 (1995-02-01), Kasper et al.
patent: 5425365 (1995-06-01), Iinuma
patent: 5505204 (1996-04-01), Picot et al.
Ohtsuki Shigeo
Tanaka Motonao
LandOfFree
Method to estimate planar flow from Doppler velocity distributio does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Method to estimate planar flow from Doppler velocity distributio, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method to estimate planar flow from Doppler velocity distributio will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1798600