Magnetic resonance imaging

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Also known as MRI, it's a technique that used resonance of nucleus ( it's also possible with electron resonance ) to acquire the reciprocal space of the spin density, and also relaxation properties. This is possible by using gradients in different direction. This gradients could affect the nuclear spin ( most of the time we consider proton from water, and less frequently another single spin system ) in different ways :

- changing the resonance frequency - changing the frequency that is required to excite the nucleus - changing the relative phases

Gradients could be used in two ways :

- apply gradients longer - apply stronger gradients

Imagery is used for several purpose, like :

- routine medical imagery - biomedical research imagery - batteries - other materials

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