Method and apparatus for adjusting the intensity profile of an u

Details Method and apparatus for adjusting the intensity profile of an u Method and apparatus for adjusting the intensity profile of an u

1987-12-24

1990-06-26

Teska, Kevin J.

Boots, shoes, and leggings

73609, 73646, 367103, 367105, 367138, 367155, H04B 1100, G01N 2900

Patent

active

049377671

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.

REFERENCES:
patent: 3919683 (1975-11-01), Itamura et al.
patent: 4075598 (1978-02-01), Takamizawa et al.
patent: 4161121 (1979-07-01), Zitelli et al.
patent: 4234940 (1980-11-01), Iinuma
patent: 4290310 (1981-09-01), Anderson
patent: 4353123 (1982-10-01), Rost et al.
patent: 4455630 (1984-06-01), Loonen

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