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) By default, however, filenames use the Segoe UI font, and the tone letter U+A789 is identical to the colon in this font, so it can be used in place of the colon. Several programming languages use the colon for various purposes. A number of programming languages, most notably Pascal and Ada, use a colon immediately followed by an equality sign (codice_1), in which case the colon and the equality sign are considering to compose to an independent "assignment sign"; this can be represented in Unicode as . Labels—targets for jumps, notably goto, but also some switch statements—are general formed of