Thermal preactivation of gaseous precursor filled compositions
First Claim
Patent Images
1. A method of providing an image of a region of a patient comprising:
- heating a composition comprising lipid vesicles encapsulating a gaseous precursor to a temperature at or above the boiling point of the gaseous precursor prior to administering the composition to the patient, wherein the gaseous precursor is a fluorinated compound, and wherein said lipid vesicles comprise at least one phosphatidylcholine, at least one phosphatidylethanolamine, and at least one phosphatidic acid, wherein said phosphatidylcholine is selected from the group consisting of dioleoylphosphatidylcholine, dimyristoylphosphatidylcholine, dipalmitoylphosphatidylcholine, and distearoyl-phosphatidylcholine;
said phosphatidylethanolamine is selected from the group consisting of dipalmitoylphosphatidylethanolamine, dioleoyl-phosphatidylethanolamine, and N-succinyl-dioleoyl-phosphatidylethanolamine; and
said phosphatidic acid is dipalmatoylphosphatidic acid; and
scanning the patient using diagnostic imaging to obtain visible images of the region of the patient.
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Abstract
The present invention describes, among other things, the surprising discovery that gaseous precursor filled compositions are profoundly more effective as acoustically active contrast agents when they are thermally preactivated to temperatures at or above the boiling point of the instilled gaseous precursor prior to their in vivo administration to a patient. Further optimization of contrast enhancement is achieved by administering the gaseous precursor filled compositions to a patient as an infusion. Enhanced effectiveness is also achieved for ultrasound mediated targeting and drug delivery.
394 Citations
30 Claims
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1. A method of providing an image of a region of a patient comprising:
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heating a composition comprising lipid vesicles encapsulating a gaseous precursor to a temperature at or above the boiling point of the gaseous precursor prior to administering the composition to the patient, wherein the gaseous precursor is a fluorinated compound, and wherein said lipid vesicles comprise at least one phosphatidylcholine, at least one phosphatidylethanolamine, and at least one phosphatidic acid, wherein said phosphatidylcholine is selected from the group consisting of dioleoylphosphatidylcholine, dimyristoylphosphatidylcholine, dipalmitoylphosphatidylcholine, and distearoyl-phosphatidylcholine;
said phosphatidylethanolamine is selected from the group consisting of dipalmitoylphosphatidylethanolamine, dioleoyl-phosphatidylethanolamine, and N-succinyl-dioleoyl-phosphatidylethanolamine; and
said phosphatidic acid is dipalmatoylphosphatidic acid; and
scanning the patient using diagnostic imaging to obtain visible images of the region of the patient. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 25, 26, 29)
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13. A method of diagnosing the presence of diseased tissue in a patient comprising:
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heating a composition lipid vesicles encapsulating a gaseous precursor to a temperature at or above the boiling point of the gaseous precursor prior to administering the composition to the patient, wherein the gaseous precursor is a fluorinated compound, and wherein said lipid vesicles comprise at least one phosphatidylcholine, at least one phosphatidylethanolamine, and at least one phosphatidic acid, wherein said phosphatidylcholine is selected from the group consisting of dioleoylphosphatidylcholine, dimyristoylphosphatidylcholine, dipalmitoylphosphatidylcholine, and distearoyl-phosphatidylcholine;
said phosphatidylethanolamine is selected from the group consisting of dipalmitoylphosphatidylethanolamine, dioleoyl-phosphatidylethanolamine, and N-succinyl-dioleoyl-phosphatidylethanolamine; and
said phosphatidic acid is dipalmatoylphosphatidic acid; and
scanning the patient using diagnostic imaging to obtain a visible image of any diseased tissue in the patient. - View Dependent Claims (14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 27, 28, 30)
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Specification