摘要:
PROBLEM TO BE SOLVED: To provide a magnetic resonance contrast agent containing metal oxide magnetic nanoparticles with zinc included, which has enhanced contrast effect.SOLUTION: In water soluble metal oxide nanoparticles containing zinc, zinc has been added to the matrix of the metal oxide nanoparticles, or the characteristics of metal substitution exist. Then, the effect of drastically enhanced magnetic characteristics of nanoparticles and magnetic resonance contrast results. Also, there is included a magnetic resonance contract agent having a structure of a hybrid form of "metal oxide nanoparticles with zinc included and a biologically/chemically active substance" in which a biological and chemical substance such as a protein, a peptide, a nucleic acid, an antibody, a chemically reactive group and a chemical substance is bonded to metal nanoparticles.
摘要:
The present invention relates a dual-modality PET (positron emission tomography)/MRI (magnetic resonance imaging) contrast agent, a hybrid nanoparticle comprising: (a) a magnetic signal generating core; (b) a water-soluble multi-functional ligand coated on the signal generating core; and (c) a positron emitting factor linked to the water-soluble multi-functional ligand. The contrast agent of the present invention is the dual-modality contrast agent enabling to perform PET and MR imaging and can effectively obtain images having the merits of PET (excellent sensitivity and high temporal resolution) and MR (high spatial resolution and anatomical information) imaging. The contrast agent of the present invention is very useful for non-invasive and highly sensitive real-time fault-free imaging of various biological events such as cell migration, diagnosis of various diseases (e.g., cancer diagnosis) and drug delivery.
摘要:
The present invention relates to water soluble magnetic nanocomposite using an amphiphilic compound. Specifically, the present invention relates to water soluble magnetic nanocomposite which may be not only used as a contrast agent for magnetic resonance imaging (MRI), an intelligent contrast agent for diagnosing cancer characterized by binding a tissue-specific binder ingredient, a drug delivery system for simultaneous diagnosis and treatment by polymerizing or enveloping drugs and binding a tissue-specific binder ingredient, but also used for separating a target substance using magnetism, and a process for preparing the same.
摘要:
Particle comprising a coated magnetic ferric oxide with a diameter of 20 nm to 1 mu m, related to the total particle core diameter, which is less than 6, is new. Independent claims are included for: (1) procedure for the production of particles comprising mixing together aqueous solution of iron-(II)-salt and iron-(III)-salt with aqueous alkali solution in the presence of a synthetic polymer or copolymer, starch, dextran, cyclodextrin, fatty acid, polysaccharide, lecithin, mono-, di- or tri glycerides and/or their mixture to obtain colloidal solution of the particle; mixing through particle-containing solution in magnetic gradient field; measuring the magnetic gradient field; and extracting the particle from the gradient field; (2) the particle produced by the process; (3) a composition comprising at least 2% of the particle; and (4) a liquid comprising a composition, which is present in the liquid in the form of a stabilized colloidal solution.
摘要:
A contrast agent for medical imaging techniques is described, comprising particles consisting of at least a core, the core comprising at least an oxide, mixed oxide, or hydroxide of specific elements. The particles optionally comprise shells containing or consisting of precious metal, radioactive isotopes, bio-compatibility agents, and/or antibodies. The applied imaging techniques comprise in particular magnetic resonance tomography (MRI), magnetic particle imaging, positron emission tomography (PET), single photon emission computed tomography (SPECT), computed tomography (CT), and ultrasound (US).
摘要:
Immunomagnetic nanoparticles are used as a contrast agent for enhancing medical diagnostic imaging such as magnetic resonance imaging (MRI). The present invention is directed to methods of making targeted MRI contrast agents from immunomagnetic particles, and to methods of using such MRI contrast agents. Typically, such targeted MRI contrast agents provide enhanced relaxivity, improved signal-to-noise, targeting ability, and resistance to agglomeration. Methods of making such MRI contrast agents typically afford better control over particle size, and methods of using such MRI contrast agents typically can afford enhanced blood clearance rates and distribution. The ability to use the contrast agents im MRI provides a tool in the diagnosis and treatment of several disease states.