It is a technique that uses the emission of electromagnetic waves created by a particular device, these waves through thin fabric were to be analyzed.

The received signals are generated by magnetic resonance of hydrogen nuclei especially abundant in all the constituent body, these signals are deciphered by a special transducer that builds three-dimensional image.

The production of images with MRI requires a certain time, and for this reason that blood, being in motion, does not generate detectable signals; different is instead the case of a hematoma.

For the same reasons, MRI is not very applicable to districts on the move as the upper abdomen.

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