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.
For an MRI exam, no special preparation is needed. On the day of the MRI, you may eat or drink fluids, go about your normal activities, and take your routine medicines, unless your doctor says otherwise. For an MRA exam, your testing center will tell you about any special preparation needed.Plan to arrive 30 minutes before your scheduled exam time to register.RI uses magnetic fields and radio waves to make pictures of the body without using x-rays. The pictures, called scans, are 3-dimensional and are shown on a screen. The checklist below helps to show if you can have MRI and MRA.