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
American Society of Colon and Rectal Surgeons medical education courses. For this provision, it is accredited by the Accreditation Council for Continuing Medical Education. The ASCRS holds an annual conference "to provide participants with in-depth and up-to-date knowledge relative to surgery for diseases of the colon, rectum, and anus", with an emphasis on patient care, teaching, and research. The ASCRS is a participant in the American Joint Committee on Cancer. In 2016, the American College of Surgeons reported on its partnership with the ASCRS in developing technical skill assessments in the colorectal surgery field. The ASCRS was one of the contributors in the formation of the National