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Method of ultrasonic imaging of the gastrointestinal tract and upper abdominal organs using an orally administered negative contrast medium

  • US 5,385,147 A
  • Filed: 09/22/1993
  • Issued: 01/31/1995
  • Est. Priority Date: 09/22/1993
  • Status: Expired due to Fees
First Claim
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1. (Amended) A method of ultrasonic imaging of tissue defining the gastrointestinal tract and organs in the upper abdominal region comprising:

  • a) introducing a sufficient amount of a chemically defined essentially sonolucent and nonechogenic ultrasound contrast agent solution that is stable under gastric conditions and has a gastric emptying time of at least about twenty minutes into the stomach to substantially fill the stomach and remove gas by displacement, dispersion and absorption from the imaging field;

    b) applying ultrasonic energy to the stomach and upper abdominal region while said solution is present in the gastrointestinal tract, said energy passing through the solution and being reflected by said tissue and said organs; and

    c) forming an image from the reflected energy.

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