Lower gastrointestinal series Lower gastrointestinal series A lower gastrointestinal series is a medical procedure used to examine and diagnose problems with the human colon (large intestine). Radiographs (X-ray pictures) are taken while barium sulfate, a radiocontrast agent, fills the colon via an enema through the rectum. The term barium enema usually refers to a lower gastrointestinal series, although enteroclysis (an upper gastrointestinal series) is often called a small bowel barium enema. This test may be done in a hospital or clinic. The patient lies on the X-ray table and a preliminary X-ray is taken. The patient is then asked to lie on the
Colon (punctuation) a label name followed by a colon. These include C and DOS batch files. For the double colon used in computer programming, see the scope resolution operator, and class member access of C++. The colon is also used as part of the conditional operator in C and other languages. In a number of languages, including JavaScript and Python, colons are used to define name-value pairs in a dictionary or object. The colon is also used in many operating systems commands. It is often used as a single post-fix delimiter, signifying a token keyword had immediately preceded it or the transition