Compositions and method for multimodal imaging
First Claim
1. A composition for imaging of a biological tissue, said composition comprising:
- a) two or more separate and unlinked signal modifying agents, each of said agents being specific for at least one imaging modality and each of said agents being specific for a different imaging modality; and
b) a colloidal carrier comprising said two or more signal modifying agents wherein said carrier retains a sufficient amount of said agents for a time sufficient to acquire in vivo imaging data from each of the two or more signal modifying agents using said composition, and said colloidal carrier is a liposome comprising at least one lipid, cholesterol, and at least one pegylated lipid; and
wherein said composition is specific for two or more imaging modalities selected from magnetic resonance imaging (MRI), X-ray, positron emission tomography (PET), computed tomography (CT), autoradiography, single-photon emission computed tomography (SPECT), fluoroscopy, optical imaging, fluorescence imaging, bioluminescence imaging and combinations thereof and each of the signal modifying agents is present at a different concentration that is sufficient to acquire in vivo imaging data from an imaging modality for which said signal modifying agent is specific, wherein said composition comprises i) a signal modifying agent specific for MRI comprising gadoteridol and a signal modifying agent specific for CT comprising iohexol, ii) a signal modifying agent specific for optical imaging comprising a fluorophore and a signal modifying agent specific for CT comprising iohexol or iii) a signal modifying agent specific for optical imaging comprising a fluorophore and a signal modifying agent specific for MRI comprising gadoteridol.
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Abstract
Provided are signal modifying compositions for medical imaging comprising a carrier and two or more signal modifying agents specific for two or more imaging modalities. The compositions are characterized by retention efficiency, with respect to the signal modifying agents, which enables prolonged contrast imaging without significant depletion of the signal modifying agents from the carrier. The carriers of the present invention are lipid based or polymer based, the physico-chemical properties of which can be modified to entrap or chelate different signal modifying agents and mixtures thereof and to target specific organs or tumors or tissues within a mammal.
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Citations
41 Claims
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1. A composition for imaging of a biological tissue, said composition comprising:
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a) two or more separate and unlinked signal modifying agents, each of said agents being specific for at least one imaging modality and each of said agents being specific for a different imaging modality; and b) a colloidal carrier comprising said two or more signal modifying agents wherein said carrier retains a sufficient amount of said agents for a time sufficient to acquire in vivo imaging data from each of the two or more signal modifying agents using said composition, and said colloidal carrier is a liposome comprising at least one lipid, cholesterol, and at least one pegylated lipid; and wherein said composition is specific for two or more imaging modalities selected from magnetic resonance imaging (MRI), X-ray, positron emission tomography (PET), computed tomography (CT), autoradiography, single-photon emission computed tomography (SPECT), fluoroscopy, optical imaging, fluorescence imaging, bioluminescence imaging and combinations thereof and each of the signal modifying agents is present at a different concentration that is sufficient to acquire in vivo imaging data from an imaging modality for which said signal modifying agent is specific, wherein said composition comprises i) a signal modifying agent specific for MRI comprising gadoteridol and a signal modifying agent specific for CT comprising iohexol, ii) a signal modifying agent specific for optical imaging comprising a fluorophore and a signal modifying agent specific for CT comprising iohexol or iii) a signal modifying agent specific for optical imaging comprising a fluorophore and a signal modifying agent specific for MRI comprising gadoteridol. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39)
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40. A composition for imaging of a biological tissue, said composition comprising:
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a) two or more separate and unlinked signal modifying agents, each of said agents being specific for at least one imaging modality and each of said agents being specific for a different imaging modality; and b) a colloidal carrier comprising said two or more signal modifying agents wherein said carrier retains a sufficient amount of said agents for a time sufficient to acquire in vivo imaging data from each of the two or more signal modifying agents using said composition, and said colloidal carrier is a liposome comprising at least one lipid, cholesterol, and at least one pegylated lipid; and wherein said composition is specific for two or more imaging modalities selected from magnetic resonance imaging (MRI), X-ray, positron emission tomography (PET), computed tomography (CT), autoradiography, single-photon emission computed tomography (SPECT), fluoroscopy, optical imaging, fluorescence imaging, bioluminescence imaging and combinations thereof and each of the signal modifying agents is present at a different concentration that is sufficient to acquire in vivo imaging data from an imaging modality for which said signal modifying agent is specific, wherein one signal modifying agent is specific for MRI and comprises gadolinium at a concentration >
5 mmol/L and wherein another signal modifying agent is specific for CT and comprises iodine at a concentration of at least 1 mg/ml. - View Dependent Claims (41)
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Specification