How Does an MRI Make an Image? – Conway Lien, MD – Imaging Medical Director

– Frequency in MRI changes
the proton alignment, so it gives a little bit of
an energy first to the proton so that they’re aligned differently within the magnetic field. And as we shut off that radio frequency, the protons then relax or go
back to their natural state. And as they do, they release energy and that energy is
detected by the MRI device and that’s where the signal comes in that the computer can
process to make an image.

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