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.
Recent MRA technology has led to the development of open MRA which does not generate a claustrophobic feeling. These open MRA are also useful for obese patients. However, the images generated by the open MRA are usually of a lower quality compared to the closed MRA. How does the procedure work? The basis of MRA is to generate radio waves at high magnetic frequencies. MRA images depict differences in the content and distribution of water in various tissues.