Ultrasonic imaging system utilizing a long-persistence contrast agent
First Claim
1. A method of forming stabilized microbubbles for in vivo use, comprising the steps of:
- providing a first gas, a second gas, a membrane forming material, and a liquid, wherein said first gas and said second gas are present in a molar ratio of about 1;
100 to about 1,000;
1, and wherein said second gas is a gas at 37°
C. and 760 mm Hg with the proviso that said first gas and said second gas are not water vapor; and
surrounding said first gas and said second gas with said membrane forming material to form stabilized microbubbles in said liquid.
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Accused Products
Abstract
A microbubble preparation formed of a plurality of microbubbles comprising a first gas and second gas surrounded by a membrane such as a surfactant, wherein the first gas and the second gas are present in a molar ration of from about 1:100 to abut 1000:1, and wherein the first gas has a vapor pressure of at least about (760-X) mm Hg at 37° C., where x is the vapor pressure of the second gas at 37° C., and wherein the vapor pressure of each of the first and second gases is greater than about 75 mm Hg at 37° C.; also disclosed are methods for preparing microbubble compositions, including compositions that rapidly shrink from a first average diameter to a second average diameter less than about 75% of the first average diameter and are stabilized at the second average diameter; methods and kits for preparing microbubbles; and methods for using such microbubbles as contrast agents.
36 Citations
20 Claims
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1. A method of forming stabilized microbubbles for in vivo use, comprising the steps of:
- providing a first gas, a second gas, a membrane forming material, and a liquid, wherein said first gas and said second gas are present in a molar ratio of about 1;
100 to about 1,000;
1, and wherein said second gas is a gas at 37°
C. and 760 mm Hg with the proviso that said first gas and said second gas are not water vapor; and
surrounding said first gas and said second gas with said membrane forming material to form stabilized microbubbles in said liquid. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
- providing a first gas, a second gas, a membrane forming material, and a liquid, wherein said first gas and said second gas are present in a molar ratio of about 1;
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14. A composition comprising stabilized microbubbles for in vivo use, comprising:
a first gas, a second gas, a membrane forming material, and a liquid, wherein said first gas and said second gas are present in a molar ratio of about 1;
100 to about 1,000;
1, and wherein said second gas is a gas at 37°
C. and 760 mm Hg with the proviso that said first gas and said second gas are not water vapor; and
said first gas and said second gas are surrounded with said membrane forming material to form stabilized microbubbles in said liquid.- View Dependent Claims (15, 16, 17, 18, 19, 20)
Specification