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Ultrasonic diagnostic apparatus

  • US 5,099,850 A
  • Filed: 01/12/1990
  • Issued: 03/31/1992
  • Est. Priority Date: 01/17/1989
  • Status: Expired due to Term
First Claim
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1. An ultrasonic diagnostic apparatus for observing an ultrasonic tomographic image of a bodily portion of a patient,:

  • an insertion section which is insertable into a cavity of the body of the patient and having a distal end and a proximal end;

    an optical observation means for observing an optical image of said bodily portion of the patient, said optical means including an objective lens system arranged at the distal end of the insertion section and defining an observation field;

    an ultrasonic observation means for observing an ultrasonic tomographic image of said bodily portion of the patient and having an ultrasonic vibrating element arranged within the distal end of the insertion section;

    a display means electrically coupled with said ultrasonic vibrating element and having a display screen for displaying the ultrasonic tomographic image of said bodily portion of the patient;

    means for obtaining a direction indicator representing a predetermined positional relationship between the ultrasonic tomographic image and the optical image; and

    a display controlling means for displaying said direction indicator in a superposed manner with the ultrasonic tomographic image displayed on the display screen of the displaying means.

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