A river begins at a source (or more often several sources), follows a path called a course, and ends at a mouth or mouths. The water in a river is usually confined to a channel, made up of a stream bed between banks. In larger rivers there is often also a wider floodplain shaped by flood-waters over-topping the channel.
A 'computerized tomography' (CT) (or 'computerized axial tomography' (CAT) scan) uses a computer that takes data from several X-ray images of structures inside a human's or animal's body and converts them into pictures on a monitor.
CT scanning also known as CT scan is a noninvasive, painless radiological test to evaluate many disorders of the brain. CT scan uses special x-ray equipment to produce multiple cross sectional images of the head- which are then analyzed by a computer and converted into a 3 dimensional picture. The CT scan is many times more sensitive then the plain x ray in imaging the brain. What conditions of the head can CT scan be used for? A head CT may be recommended if one has: