Method and apparatus for adjusting the intensity profile of an ultrasound beam
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United States of America Patent
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Jun 26, 1990
Grant Date -
N/A
app pub date -
Dec 24, 1987
filing date -
Dec 24, 1986
priority date (Note) -
Expired
status (Latency Note)
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Abstract
The intensity profile of an ultrasound beam in an ultrasound imaging system is adjusted by driving the individual piezoelectric crystals with drive signals having adjustable pulse durations. The duration of the drive pulse determines the frequency spectrum of the pulse and therefore determines the amplitude of the emitted ultrasound wave. The pulse durations may be selected such as to compose a desired profile of the ultrasound beam.
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