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Ultrasonic diagnostic apparatus

  • US 5,509,413 A
  • Filed: 08/05/1994
  • Issued: 04/23/1996
  • Est. Priority Date: 08/11/1993
  • Status: Expired due to Fees
First Claim
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1. An ultrasonic diagnostic apparatus for obtaining ultrasonic information by scanning an interior of a subject with an ultrasonic wave through an ultrasonic probe, an output level of the ultrasonic wave being determined on the basis of a first parameter and a second parameter, the first parameter being a drive voltage which is applied to the ultrasonic probe, comprising:

  • means for setting the second parameter, wherein the second parameter is selected from at least one of depth of focus, rate frequency, burst wave number transmission aperture and duty ratio of the ultrasonic wave; and

    means for controlling the drive voltage on the basis of the set second parameter such that the output level of the ultrasonic wave is equal to or less than a predetermined upper limit value.

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