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 (punctuation) Finnish "USA:n" and Swedish "USA:s" for the genitive case of "USA", Finnish "%:ssa" for the inessive case of "%", or Finnish "20:een" for the illative case of "20"). In Swedish, the colon is used in contractions, such as "S:t" for "Sankt" (Swedish for "Saint"), e.g. in the Stockholm metro station "S:t Eriksplan". This can even occur in people's names, for example ("" for "Axelson"). The colon was also used to mark abbreviations in early modern English. In Armenian, a colon indicates the end of a sentence, similar to a Latin full stop or period. The colon is also used as