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
Johnny Colon and in 1968 founded the East Harlem Music School. His 2008 album "Keeping It Real" features the American pop songbook. Johnny Colon Johnny Colon is an American salsa musician, leader of the Johnny Colon Orchestra and founder of the East Harlem Music School, also known as a major contributor to the boogaloo sound of the 1960s. Colon was born in New York City to parents of Puerto Rican heritage. He wrote most of the Orchestra's tunes, sings, plays percussion, piano and trombone, and first found success in the world of salsa with his 1967 debut album, "Boogaloo Blues". The record