SES SA is a Luxembourg-based provider of satellite communications and broadcasting services. Together with its numerous direct and indirect subsidiaries located in Europe, Americas and Asia, the Company provides satellite-delivered services for broadcasting and media distribution, including television and radio programming. Its...
Imaging tests like a CT scan or MRI can help determine the type of stroke; blood flow tests like cerebral angiography, can help evaluate the size and location of blockages. An ischemic stroke is caused by a blockage of an artery in the brain, and a hemorrhagic stroke is caused by bleeding in the brain.
Magnetic resonance imaging (MRI) is a test that uses a magnetic field and pulses of radio wave energy to take pictures of the head. In many cases, MRI gives information that can't be seen on an X-ray, ultrasound, or computed tomography (CT) scan. Problems with blood vessels may include an aneurysm or abnormal twisted blood vessels that are present at birth (this is called an arteriovenous [AV] malformation). 2  Check blood flow or blood clots to the brain. 3  MRI can show bleeding in or around the brain.