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) of a list: while a double colon codice_3 is read as "has type of" (compare scope resolution operator): The ML languages (including Standard ML and OCaml) have the above reversed, where the double colon (codice_3) is used to add an element to the front of a list; and the single colon (codice_5) is used for type guards. MATLAB uses the colon as a binary operator that generates vectors, as well as to select particular portions of existing matrices. In Python, which uses indentation to indicate blocks, the colon is used in statements to indicate that the next line is the