Paramagnetic Contrast Agent (GBCA)

Paramagnetic contrast agents are substances used in magnetic resonance imaging (MRI) to enhance image contrast. They work by altering the magnetic properties of nearby water protons, primarily shortening the T1 relaxation time, which leads to brighter signals on T1-weighted images. These agents are crucial for improving the visualization and differentiation of internal body structures, aiding in the diagnosis of various conditions. Gadolinium-based contrast agents are the most common type, but manganese and iron-based agents are also used. A major safety concern is nephrogenic systemic fibrosis (NSF) in patients with severe kidney disease.

Other names

MRI contrast agentGadolinium-based contrast agentManganese-based contrast agentT1 contrast agentT2 contrast agent

Shortens T1 relaxation time of nearby water protons, increasing signal intensity on T1-weighted MRI images.