摘要:
PURPOSE: A contrast agent is provided to be able to be used as a contrast agent for diagnosis of diseases generated in every organs as the size of dysprosium oxide nanoparticle is very small, which facilitate to be discharged to urine through the kidney. CONSTITUTION: An MRI contrast agent includes a dysprosium oxide nanoparticle made by a dysprosium oxide nanoparticle coupled with a biocompatible ligand. A manufacturing method of the dysprosium oxide nanoparticle comprises 1) a step of manufacturing reactant 1 by dissolving a dysprosium precursor in glycol, adding a basic solution and reacting at 70-90deg.C; 2) a step of manufacturing reactant 2 by adding hydrogen peroxide to the reactant 1 and reacting; and 3) a step of adding a biocompatible ligand to the reactant 2 and reacting.
摘要:
PURPOSE: A method for manufacturing iron oxide nanocapsules for a MRI contrast agent is provided to obtain oxide nanocapsules with high stability. CONSTITUTION: An iron oxide nanocapsule is formed by encapsulating a plurality of iron oxide nanoparticles in a capsule material containing biodegradable polymers and surfactant. The iron oxide nanocapsule is prepared by dispersing 0.1-20 wt% of iron oxide nanoparticles in organic solvent, mixing the dispersed liquid and surfactant solution, emulsifying the mixture, and inputting water to the emulsified liquid.
摘要:
PURPOSE: A magnetic resonance imaging T2 contrast media for cell contrast is provided to ensure ferrimagnetism and high relaxivity and to enable effective uptake into cells. CONSTITUTION: A magnetic resonance imaging T2 contrast media for cell contrast contains magnetic nanoparticles with ferrimagnetism at room temperature. The magnetic nanoparticles are magnetite(Fe_3O_4), maghemite(gamma-Fe_3O_4), cobalt ferrite(Co-Pt alloy), cobalt(Co), or mixture thereof. The size of the magnetic nanoparticles is 10-1000 nm. The magnetic nanoparticle is coated with biocompatible materials, polyethylene.
摘要:
Various compositions that include a hydrophobic compound and a polyamino acid conjugate are prepared. The compositions described herein are useful for a variety of drug, biomolecule, and imaging agent delivery applications.
摘要:
The present invention relates to an image material and a method for manufacturing the same and, more particularly, to an atherosclerotic plaque-specific MR image contrast agent and a method for manufacturing the same. The contrast agent of the present invention is an active contrast agent which is able to diagnose early atherosclerotic plaque and effectively realizes the atherosclerotic plaque-specific MR image by controlling the size of the phospholipid nanoparticles and extending the residence time of the phospholipid nanoparticles in the blood vessels. Also, the contrast agent is able to acquire an MR image using an amount less than the existing passive contrast agent and is able to easily diagnose diseases accompanying the atherosclerosis.
摘要:
PURPOSE: A ferric oxide complex nanoparticle is provided to be selectively combined to activated macrophages in a stable form in the aqueous environment by being coated with a block copolymer containing dextran sulfate and polyglycerol monomethacrylate (PGMA). CONSTITUTION: A ferric oxide complex nanoparticle contains the ferric oxide complex nanoparticle and a block copolymer coating the surface of the nanoparticle. The end of dextran sulfate of the block copolymer consists polyglycerol monomethacrylate. The block copolymer is denoted by chemical formula 1. In the chemical formula 1, n is a fixed number of 10-1,000, and m is a fixed number of 2-1,000. A producing method of the ferric oxide complex nanoparticle comprises the following steps: producing polyglycerol monomethacrylate by radical-polymerizing using glycerol monomethacrylate as a chain transfer agent, and cysteamine; reacting the polyglycerol monomethacrylate with dextran sulfate to obtain the block copolymer; and coating the ferric oxide complex nanoparticle with the block copolymer.
摘要:
PURPOSE: A hydrophilic nanoparticle, a colloidal solution, and an MRI(Magnetic Resonance Imaging) contrast agent containing the same are provided to be applied to a bio-medical field and to ensure excellent dispersion stability. CONSTITUTION: A hydrophilic nanoparticle with a modified surface contains monosaccharide phosphoric acid or a derivative thereof attached on the surface of inorganic particles. The size of the hydrophilic nanoparticle is 1-200 nm. The organic particle is a metal, metal chalcogenide, metal oxide, a magnetic material, a magnetic alloy material, a semi-conductive material, or a multicomponent hybrid structure. The monosaccharide phosphoric acid is glucose-6-phosphate, fructose-6-phosphate, or mannose- 6-phosphate. A colloidal solution contains the hydrophilic nanoparticles dispersed in water. A contrast agent contains the colloidal solution. The contrast agent is an MRI T1 contrast agent or an MRI T2 contrast agent.
摘要:
PURPOSE: A nanoparticle including a gadolinium oxide nanoparticle coated with a biocompatible ligand, and a producing method thereof are provided to diagnose brain diseases using the particle passing through a blood-brain barrier. CONSTITUTION: A nanoparticle including a gadolinium oxide nanoparticle coated with a biocompatible ligand includes an antibody or protein combined with the biocompatible ligand. The biocompatible ligand is selected from the group consisting of polyethylene glycol, lactobionic acid, and D-glucuronic acid. The size of the nanoparticle is 0.5~10 nanometers. A producing method of the nanoparticle comprises the following steps; obtaining a mixture by adding the biocompatible ligand and a metal precursor to a polar organic solvent; obtaining a reactant by stirring the mixture and supplying air; and obtaining a final product by adding an organic solvent to the reactant.