1. Stroke - Screening and diagnosis -- Mayo Clinic
If you've had a previous stroke or TIA or think you're at risk of stroke, talk with your doctor about screening and diagnostic tests. Before treating a stroke, your doctor must diagnose the type of stroke and its location.
http://www.mayoclinic.com/invoke.cfm?objectid=487C37FA-C927-45BF-84821670F16351...

2. Hemorrhagic Stroke: Symptoms and Diagnosis -- Information from the Merck Manual
Cerebral angiography (see Diagnosis of Brain, Spinal Cord, and Nerve Disorders: Cerebral Angiography ) is usually performed within 72 hours to confirm the diagnosis and to identify the site of the aneurysm or arteriovenous malformation causing...
http://www.merck.com/mmhe/sec06/ch086/ch086d.html#sec06-ch086-ch086d-732

3. Lacunar stroke -- Information from Harvard Medical School
A stroke in this area of the brain is called a lacunar stroke. Unlike strokes that damage the cortex, lacunar strokes are only rarely caused by a blood clot that forms elsewhere in the body, such as the neck or heart, and travels through the...
http://www.intelihealth.com/IH/ihtIH/WSIHW000/9339/10240.html#diagnosis