摘要:
La présente invention se rapporte à l'utilisation in vivo d'oxydes de métal superparamagnétiques biologiquement dégradables et métabolisables en tant qu'agents de contraste à résonance magnétique. Suivant leur préparation, ces oxydes de métal ont la forme dispersoïde particulaire superparamagnétique ou de fluides superparamagnétiques, dans lesquels le milieu en suspension est un support physiologiquement acceptable et peut être soit dépourvu soit entouré d'une couche polymère à laquelle sont fixées des molécules biologiques. Dans le cas de particules enrobées, les molécules biologiques peuvent être choisies pour cibler des organes ou des tissus spécifiques. La répartition biologique desdits oxydes de métal dans des organes ou des tissus cibles résulte en une image plus détaillée desdits organes ou desdits tissus, car les oxydes de métal exercent en raison de leurs propriétés superparamagnétiques des effets profonds sur les noyaux d'hydrogène responsables de l'image à résonance magnétique.
摘要:
The invention relates to an imaging diagnostic method comprising a contrast agent with a contrast enhancer in a magnetic resonance tomography (MRT)-assisted diagnosis of carcinoma diseases or carcinomas, particularly hepatocellular carcinoma (HCC). The contrast agent is preferably a gadolinium compound, preferably Gd-DTPA with iRGD as a contrast enhancer for improved imaging in the MRT of carcinomas, particularly HCC. The invention also relates to a method for the risk stratification of patients and subjects using said diagnosis.
摘要:
The present invention relates to a method of preparation of formulations of gadolinium metal complexes of the macrocyclic chelator DOTA, which further comprise a small excess of free DOTA. The method uses controlled conditions such that excess gadolinium is present as a precipitate of gadolinium oxide, with filtration to remove the excess, prior to the addition of a defined excess of DOTA chelator. Also provided is a method of preparation of MRI contrast agents based on Gd-DOTA.
摘要:
Systems, methods and related devices used to produce and collect polarized noble gas to inhibit, suppress, detect or filter alkali metal nanoclusters to preserve or increase a polarization level thereof. The systems can include a pre-sat chamber that has an Area Ratio between 20 and 500.
摘要:
A magnetically opaque medical device is disclosed wherein a contrast agent is incorporated into the actual device. The medical device is generally comprised of a base material forming the structure of the device and a contrast agent, such as tocopherol and tocopherol derivative solutions or suspensions, gadolinium, or nickel sulfate integrated into the base material itself or posited on a substantial portion of an exterior surface of the device. The device may include other additional functional agents and layers.
摘要:
A method for ligand-based binding of lipid encapsulated particles to molecular epitopes on a surface in vivo or in vitro comprises sequentially administering (a) a site-specific ligand activated with a biotin activating agent; (b) an avidin activating agent; and (c) lipid encapsulated particles activated with a biotin activating agent, whereby the ligand is conjugated to the particles through an avidin-biotin interaction and the resulting conjugate is bound to the molecular epitopes on such surface. The conjugate is effective for imaging by x-ray, ultrasound, magnetic resonance, positron emission tomography or nuclear imaging. Compositions for use in ultrasonic imaging of nature or synthetic surfaces and for enhancing the acoustic reflectivity thereof are also disclosed.
摘要:
This document provides methods and materials that can be used to reduce or prevent contrast agent-induced toxicity. For example, devices for capturing contrast agents from blood are provided.
摘要:
The present invention relates to a nanoscale or microscale container for encapsulation and delivery of materials or substances, including, but not limited to, cells, drugs, tissue, gels and polymers contained within the container, with subsequent release of the therapeutic materials in situ, methods of fabricating the container by folding a 2D precursor into the 3D container, and the use of the container in in- vivo or in-vitro applications. The container can be in any polyhedral shape and its surfaces can have either no perforations or nano/microscale perforations. The container is coated with a biocompatible metal, e.g. gold, or polymer, e.g. parylene, layer and the surfaces and hinges of the container are made of any metal or polymer combinations.