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.
What Is a CT Scan of the Abdomen/Pelvis? CT scanning-sometimes called CAT scanning-is a noninvasive, painless medical test that helps physicians diagnose and treat medical conditions. CT imaging produces multiple images of the inside of the body and a computer to join them together in cross-sectional and 2D/3D views of the area being studied.