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.
MRI and CAT Scans. The MRI and CAT scan slice the brain radiographically into slabs. The MRI does this with magnetic fields; the CAT scan uses x-rays. The MRI provides more detail than the CAT scan. Hence, brain damage seen on an MRI - as small as 1-2mm in size -- may escape detection by a CAT scan.