Contrast agents for NMR imaging
First Claim
1. Magnetic resonance imaging contrast agents for scanning tissue comprising bilayer vesicles with paramagnetic material encapsulated therein, said vesicles formulated with an agent to promote vesicle stability for a sufficient time to allow biodistribution of said vesicles for scanning of said tissue and formulated to permit adequate water proton exchange across the vesicle bilayer to provide contrast for scanning said tissue.
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Abstract
An agent for contrast enhancement in nuclear magnetic resonance imaging is disclosed. Micellular particles such as phospholipid vesicles are associated with or enclose a paramagnetic material. The particles may be formulated with an agent, such as cholestrol, to promote vesicle stability and water exchange across the vesicle bilayer. The vesicles may or may not have antibodies or other cell recognition targeting agents attached to the surface to provide specific targeting. The vesicles provide enhanced target specificity, reduced burden of toxic contrast material and amplified contrast enhancement.
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Citations
25 Claims
- 1. Magnetic resonance imaging contrast agents for scanning tissue comprising bilayer vesicles with paramagnetic material encapsulated therein, said vesicles formulated with an agent to promote vesicle stability for a sufficient time to allow biodistribution of said vesicles for scanning of said tissue and formulated to permit adequate water proton exchange across the vesicle bilayer to provide contrast for scanning said tissue.
- 16. Magnetic resonance imaging contrast agents for scanning tissue comprising phospholipid bilayer esicles with paramagnetic material encapsulated therein, said paramagnetic material being a paramagnetic ion associated with a chelate and said vehicles formulated with an agent to promote vesicle stability for a sufficient time to allow biodistribution of said vesicles for scanning of said tissue and formulated to permit adequate water proton exchange across the vesicle bilayer to provide contrast for scanning of said tissue.
- 21. Magnetic resonance imaging contrast agents for scanning tissue comprising bilayer vesicles having a paramagnetic material associated therewith, said vesicles formulated with an agent to promote vesicle stability for a sufficient time to allow biodistribution of said vesicles for scanning of said tissue and formulated to permit adequate water proton exchange across the vesicle bilayer to provide contrast for scanning of said tissue.
Specification