How does MRI works?

Answer 1

MRI, Magnetic Resonance Imaging, works by utilizing the molecules of water within an object. The MRI machine is able to manipulate the water molecules within an object in such a way that it creates a picture using the different amounts of water within different areas of an object.

Answer 2

In very simple terms, MRI uses an enormously powerful electromagnet to align all the unbound protons in your body with the poles of the magnet. The protons are then 'plucked' or 'struck', either by radio waves or other magnetic fields. After they're 'plucked', like a guitar string, they will emit energy as they return to their 'home' position. Specialized antennae inside the machine 'listen' for these energies and map them, in 3D, to create sophisticated images of the anatomy of the subject. Extremely powerful computers crunch the data from the millions of mapped signals and recreate images, either in 3D form, or in 'slices'.