What is a barium enema?
A barium enema is an x-ray exam of your large intestine and colon (the lower intestines). The barium enema uses a special form of x-ray called fluoroscopy and a liquid contrast dye (barium) that is given through a tube inserted into your rectum. Fluoroscopy makes it possible to see internal organs in motion. When the lower intestinal tract is filled with barium, the radiologist is able to view and assess the anatomy and function of the rectum and large intestine for problems such as blockages, tumors, polyps, or other disorders.