Adjustable focusing therapeutic apparatus with no secondary focusing
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United States of America Patent
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Apr 14, 1998
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N/A
app pub date -
Apr 10, 1996
filing date -
Jan 22, 1993
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Abstract
The invention relates to the use of Dirac-type autocorrelation function signals for powering multielements ultrasonic transducers used in therapeutic application in order to minimize or eliminate secondary focusing. The Dirac-type autocorrelation function signals may be generated by a pseudo random binary code.
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