Friday, January 8, 2010

How do the gradient magnets and coil in an MRI machine work?

I don't mean ';gradient magnets fine tune the image'; sort of thing, I need exactly how they do this, in depth. I've already checked howstuffworks.com, so don't quote that.How do the gradient magnets and coil in an MRI machine work?
Have you checked wikipedia?


Gradient coils are used to spatially encode the positions of protons by varying the magnetic field linearly across the imaging volume.Gradient coils are usually resistive electromagnets powered by sophisticated amplifiers which permit rapid and precise adjustments to their field strength and direction.

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