Blurry vision, ghost images and nighttime halos around lights all can be warning signs of eye problems. 1  A flood of spots and floaters in your field of vision. 2  A sensation that a dark curtain has settled across your field of view. 3  Sudden eye pain, redness, nausea and vomiting.  Double vision, double images or ghost images.
MR Angiography (MRA) MR angiography (MRA) uses a powerful magnetic field, radio waves and a computer to evaluate blood vessels and help identify abnormalities or diagnose atherosclerotic (plaque) disease.
POLICY DESCRIPTION: Magnetic resonance angiography (MRA) is an application of magnetic resonance imaging (MRI) that. provides visualization of blood flow, as well as images of normal and diseased blood vessels. This policy. describes the principles for using magnetic resonance angiography (MRA) and magnetic resonance.