Matches in DBpedia 2015-10 for { <http://dbpedia.org/resource/MRI_contrast_agent> ?p ?o }
- MRI_contrast_agent abstract "MRI contrast agents are a group of contrast media used to improve the visibility of internal body structures in magnetic resonance imaging (MRI). The most commonly used compounds for contrast enhancement are gadolinium-based. Such MRI contrast agents shorten the relaxation times of atoms within body tissues following oral or intravenous administration. In MRI scanners, sections of the body are exposed to a very strong magnetic field causing primarily the hydrogen nuclei ("spins") of water in tissues to be polarized in the direction of the magnetic field. An intense radiofrequency pulse is applied that tips the magnetization generated by the hydrogen nuclei in the direction of the receiver coil where the spin polarization can be detected. Random molecular rotational oscillations matching the resonance frequency of the nuclear spins provide the "relaxation" mechanisms that bring the net magnetization back to its equilibrium position in alignment with the applied magnetic field. The magnitude of the spin polarization detected by the receiver is used to form the MR image but decays with a characteristic time constant known as the T1 relaxation time. Water protons in different tissues have different T1 values, which is one of the main sources of contrast in MR images. A contrast agent usually shortens, but in some instances increases, the value of T1 of nearby water protons thereby altering the contrast in the image.".
- MRI_contrast_agent thumbnail Omniscan_nima.JPG?width=300.
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- MRI_contrast_agent wikiPageWikiLink Gadavist.
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- MRI_contrast_agent wikiPageWikiLink Gadodiamide.
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- MRI_contrast_agent wikiPageWikiLink Gadoversetamide.
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- MRI_contrast_agent wikiPageWikiLink Relaxation_(NMR).
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- MRI_contrast_agent wikiPageWikiLink Superparamagnetic.
- MRI_contrast_agent wikiPageWikiLink Superparamagnetic_iron–platinum_particles.
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- MRI_contrast_agent wikiPageWikiLink File:Bluthirnschranke_nach_Infarkt_nativ_und_KM.png.
- MRI_contrast_agent wikiPageWikiLink File:Omniscan_nima.JPG.
- MRI_contrast_agent wikiPageWikiLinkText "Gadolinium contrast".
- MRI_contrast_agent wikiPageWikiLinkText "Gadolinium-based pharmaceuticals".
- MRI_contrast_agent wikiPageWikiLinkText "MRI contrast agent".
- MRI_contrast_agent wikiPageWikiLinkText "MRI contrast agent#Gadolinium".
- MRI_contrast_agent wikiPageWikiLinkText "MRI contrast agent#Protein-based MRI contrast agents".
- MRI_contrast_agent wikiPageWikiLinkText "SPIO".
- MRI_contrast_agent wikiPageWikiLinkText "contrast agent".
- MRI_contrast_agent wikiPageWikiLinkText "contrast agents used in MRI".