Surgery – Truss – Pad
Patent
1989-04-12
1990-05-29
Jaworski, Francis
Surgery
Truss
Pad
7386125, A61B 806
Patent
active
049286986
ABSTRACT:
A device for measuring the speed of moving organs and blood flows, comprising an intercorrelation circuit (100) which supplies on the basis of two successive shifted echographic lines, 2I+1 correlation function values, and a multiplex/interpolation circuit (200) which supplies, on the basis of the correlation function values, an estimate of the speed and the value of the corresponding correlation peak. In accordance with the invention, the intercorrelation circuit (100) and multiplex/interpolation (200) circuit supply the estimate of the speed and the value of the correlation peak within each of N shift zones. On the other hand, the device also comprises a zero-crossing detector (300) which defines M segments which are limited by the values of the scanning depth for which the speed passes through zero in the set of N zones, a memory (400) storing the values P.sub.ij of the correlation peak corresponding to the i.sup.th zone (i=1, . . . , N) and the j.sup.th segment (j=1, . . . , M), a detector unit (500) reconstructing the speed profile searched by retaining for each segment j the speed profile in the zone i for which P.sub.ij is maximum.
REFERENCES:
patent: 4680739 (1987-07-01), Lannuzel
patent: 4803990 (1989-02-01), Bonnefous et al.
Briody Thomas A.
Haken Jack E.
Jaworski Francis
Squire William
U.S. Philips Corporation
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