what's an mra scan
MRI vs MRA. Magnetic Resonance Imaging, or MRI, is a relatively recent diagnostic tool that uses magnetic fields to create an image of the soft tissues within the body. It is very similar to what X-ray imaging but is more advanced and has the capability to show muscles and other organs. MRA stands for Magnetic Resonance Angiography. It is basically identical to an MRI in technology and basic principles but the techniques are geared to show the movement of blood within the veins and arteries of the body.