Surgery – Diagnostic testing – Detecting nuclear – electromagnetic – or ultrasonic radiation
Patent
1997-05-07
1999-04-20
Lateef, Marvin M.
Surgery
Diagnostic testing
Detecting nuclear, electromagnetic, or ultrasonic radiation
600456, 128916, A61B 800, A61B 806
Patent
active
058953582
ABSTRACT:
A method and an apparatus for mitigating aliasing when imaging moving fluid or tissue using velocity Doppler shift data. To eliminate the effects of slight aliasing in the velocity mode, symmetrical (or non-directional) velocity/color maps are used to map positive and negative velocity data of the same magnitude to the same color and same display intensity. If the pulse repetition frequency is adjusted so that only subtle aliasing is present, an optimal frame averaging of the data can be achieved by removing the sign of the velocity data either before or during frame averaging.
REFERENCES:
patent: 5215094 (1993-06-01), Franklin et al.
patent: 5235984 (1993-08-01), D'Sa
patent: 5467770 (1995-11-01), Smith et al.
patent: 5720291 (1998-02-01), Schwartz
Becker David D.
Seyed-Bolorforosh Mir Said
Washburn Michael J.
Cabou Christian G.
Flaherty Dennis M.
General Electric Company
Imam Ali M.
Lateef Marvin M.
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