why would you use an mra instead of an mri
An MRA, or magnetic resonance angiogram, is a type of MRI scan that uses MRI's magnetic fields and radio waves to produce pictures of blood vessels inside the body, allowing doctors to locate problems that may cause reduced blood flow.
Because MRA scans look at the body's blood vessels, they are well suited to examining arteries in the brain, neck, chest, and abdomen and stomach. MRA scans are typically used for the following reasons: To find bulges (aneurysms), clots, or buildups of fat and calcium deposits in the blood vessels leading to the brain.