Device for measuring and displaying of ultrasonic echography the

Details Device for measuring and displaying of ultrasonic echography the Device for measuring and displaying of ultrasonic echography the

1991-05-20

1992-04-28

Jaworski, Francis

Surgery

Truss

Pad

7386125, A61B 802

Patent

active

051078406

ABSTRACT:
The blood flow rate Q(t) is obtained from a first unit (300) measuring the speed V(t, z), z being the depth of examination, independent of the frequency of the ultrasonic wave used. In a similar manner a second measuring unit (500) enables the measurement of the radial speeds V.sub.1 (t, z) and V.sub.2 (t, z) of the shift of the two corresponding vessel walls, and thereafter, on account of two spatial integrations (606, 607) and time integrations (608, 609), the measurement of the instantaneous variation of the radius of the vessel .DELTA.r(t). The functions Q(t) and .DELTA.r(t) are thereafter displayed in several manners, for the purpose of comparison, for the duration of at least one cardiac cycle.

REFERENCES:
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patent: 4476874 (1984-10-01), Taenzer et al.
patent: 4630612 (1986-12-01), Uchida et al.
patent: 4757822 (1988-07-01), DiGiuliomaria et al.
patent: 4803990 (1989-02-01), Bonnefous et al.
patent: 4850366 (1989-07-01), Ito et al.
patent: 4866613 (1989-09-01), Amemiya et al.

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