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. The images show how the brain functions rather than its structure. This test can often detect blocked blood vessels and areas where the brain is damaged. It can often detect abnormal areas of the brain. A person is told to lie flat on a table, then a cap containing detectors is secured over the head.