Tests can outline the affected part of the brain and help define the problem created by stroke.
Most of the following tests are safe, painless and can be done as outpatient procedures. It can often detect abnormal areas of the brain. It lets a doctor know if there are any blockages, how severe they are, and what can be done about them. In this test, dye is injected into an artery in the arm or leg, and an x-ray machine quickly takes a series of pictures of the head and neck. Similar to an MRI , this test shows more detailed information about blood vessels.