Upper gastrointestinal series tract in addition to barium, and this procedure is called double-contrast imaging. In this case the gas is referred to as the negative contrast medium. Traditionally the images produced with barium contrast are made with plain-film radiography, but computed tomography is also used in combination with barium contrast, in which case the procedure is called CT enterography. Various types of barium X-ray examinations are used to examine different parts of the gastrointestinal tract. These include barium swallow, barium meal, barium follow-through, and barium enema. The barium swallow, barium meal, and barium follow-through are together also called an upper gastrointestinal series
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