Abdominal x-ray as a scout film for other procedures such as barium enemas. An upper gastrointestinal series is where a contrast medium, usually a radiocontrast agent such as barium sulfate barium salt mixed with water, is ingested or instilled into the gastrointestinal tract, and X-rays are used to create radiographs of the regions of interest. The barium enhances the visibility of the relevant parts of the gastrointestinal tract by coating the inside wall of the tract and appearing white on the film. A lower gastrointestinal series is where radiographs are taken while barium sulfate, a radiocontrast agent, fills the colon via an
Colon (rhetoric) Colon (rhetoric) A colon (from Greek: , "pl." , "cola") is a rhetorical figure consisting of a clause which is grammatically, but not logically, complete. In Latin, it is called a "membrum" or "membrum orationis". Sentences consisting of two cola are called "dicola"; those with three are "tricola". The corresponding adjectives are "dicolic" and "tricolic"; "colic" is not used in this sense. In writing, these cola are often separated by colons. An isocolon is a sentence composed of cola of equal syllabic length. The Septuagint used this system in the poetic books such as the Psalms. When Jerome translated the