Ultrasonic pulse inversion harmonic separation with reduced motional effects
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United States of America Patent
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Feb 13, 2001
Grant Date -
N/A
app pub date -
Nov 4, 1999
filing date -
Nov 4, 1999
priority date (Note) -
Expired
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Abstract
Pulse inversion harmonic separation is performed utilizing echoes from three or more pulses of alternating phase or polarity. Temporally different echoes of opposite phase or polarity are combined in pairs, which are in turn combined to form partial sums and a final sum in which fundamental frequency signal components are substantially eliminated. Preferably the signals are normalized to a common reference level. The inventive technique can be performed by a filter structure using weighting coefficients exhibiting a Gaussian variation.
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