Final answer:
A barium enema is performed before a colonoscopy to ensure the best visualization of the colon.
Step-by-step explanation:
A barium enema is performed before a colonoscopy to ensure the best visualization of the colon.
A barium enema involves the use of a contrast material called barium sulfate, which is administered rectally. The barium coats the inside of the intestinal tract and provides a clear view of the colon during an X-ray or CT scan. This helps the healthcare provider to detect any abnormalities or diseases in the colon, such as polyps or tumors.
Therefore, the statement is true.