System and method of operating microfabricated ultrasonic transducers for harmonic imaging
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United States of America Patent
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Dec 22, 2009
Grant Date -
Jun 9, 2005
app pub date -
Oct 4, 2004
filing date -
Feb 14, 2003
priority date (Note) -
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Abstract
A capacitive microfabricated ultrasonic transducer (cMUT) is operated to improve its performance during harmonic imaging in non-linear media, such as in contrast agents or in human tissue. The cMUT is operated by inverting the transmit waveform to adjacently spaced azimuth elements, and combining at least two additional firings without adjacent inversion, for each transmit vector, thereby canceling the second harmonic generation of the cMUT; and thus, the performance of harmonic imaging using the cMUTs can achieve improvement.
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