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Magnetic Resonance Imaging Enhancers (MRI Enhancers)
- Target
- MRI Enhancers
- Molecular classification
- Chemical compound, Contrast agent, Gadolinium chelate, Iron oxide nanoparticle, Manganese complex
01
Overview
Magnetic resonance imaging (MRI) enhancers, or contrast agents, are substances used to improve the visibility of internal body structures during MRI scans. These agents work by altering the magnetic properties of nearby water protons in tissues, thereby enhancing image contrast and allowing for better differentiation between normal and abnormal tissue. The most common types are gadolinium-based, but iron oxide and manganese-based agents are also used. They are not considered therapeutic targets themselves, but tools to improve diagnostic imaging.
- Other names
- MRI contrast agentsGadolinium-based contrast agents (GBCAs)Iron oxide nanoparticlesManganese complexes
02
Mechanism of action
Shortens T1/T2 relaxation times of water protons via paramagnetism, enhancing MRI signal and tissue contrast.
03
Biological functions
Enhancement of MRI signalAlteration of T1 relaxation timeAlteration of T2 relaxation timeImproved tissue contrastVascular imaging
04
Disease associations
Detection of tumorsDetection of abscessesDetection of metastasesVascular disease
05
Safety considerations
Nephrogenic systemic fibrosis (NSF) in patients with severe renal impairment (GBCAs)Gadolinium deposition in brainAllergic reactions
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