Range-continuity anti-aliasing

Details Range-continuity anti-aliasing Range-continuity anti-aliasing

1987-11-12

1989-04-04

Smith, Ruth S.

Surgery

Truss

Pad

7386125, A61B 806

Patent

active

048176184

ABSTRACT:
A Doppler blood velocity measuring device is described which includes anti-aliasing circuitry. The anti-aliasing circuitry is based upon the use of a multigate Doppler unit which receives Doppler shift frequency information from various depth ranges. Thereafter, the Doppler frequencies received are corrected by adding a correction frequency to the perceived Doppler frequency with the correction frequency selected based on the assumption that blood flow velocity cannot change drastically between adjacent depths.

REFERENCES:
patent: 4103679 (1978-08-01), Aronson
patent: 4476874 (1984-10-01), Taenzer et al.
patent: 4534357 (1985-08-01), Powers
patent: 4607642 (1986-08-01), Powers

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