Range-continuity anti-aliasing

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

A - Human Necessities

61

B

349/36, 349/39

A61B 8/06 (2006.01)

Patent

CA 1262276

ABSTRACT RANGE-CONTINUITY ANTI-ALIASING 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.

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