3. How do contrast agents work?
3.1 Contrast agents and relaxation
The effectiveness of a paramagnetic chelate used as a contrast agent is expressed as relaxivityér 1 or r 2 , with reference to the 1/T 1 or 1/T 2 relaxation velocities of protons in water molecules. The relaxivity of a contrast agent is defined as the paramagnetic increase in the relaxation velocity of water protons normalized by the concentration of this agent
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How do contrast agents work?
Molecular imaging contrast agents
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