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Chemistry · Glossary

What is Contrast agents?

Also known as: contrast agent · relaxivity

Definition 24.18 University Chemistry — Year 3 · Chapter 24 — Bioinorganic Chemistry

A contrast agent for magnetic resonance imaging is a paramagnetic compound that shortens the relaxation times of nearby water protons. Its relaxivity r1r_1 is the increase of the relaxation rate 1/T11/T_1 per unit concentration of the agent.

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