MR angiography (MRA) is a noninvasive medical procedure that uses a magnetic field and radio frequency energy to evaluate blood vessels and help identify abnormalities or plaque. This exam does not use ionizing radiation and may require an injection of a contrast material.
Preparing for MR angiography
Before undergoing an MRI, alert your doctor if you have implants, metal clips, or other metallic objects in your body as these can be affected by the magnet. Do NOT have anything to eat or drink three hours before your examination.