A Barium enema is primarily used to diagnose issues in which part of the body?

A Barium enema is a diagnostic imaging procedure specifically designed to visualize the lower gastrointestinal tract, including the colon and rectum. During the procedure, a contrast solution containing barium is introduced into the rectum and colon, allowing clear imaging of this area through X-ray technology. The primary purpose is to detect abnormalities such as tumors, polyps, inflammatory bowel disease, or structural issues within the colon.

Other organs mentioned, such as the stomach and liver, are not involved in the Barium enema procedure since they are part of the upper gastrointestinal tract, which is assessed using different methods (like an upper GI series or ultrasound, respectively). The intestines, while they encompass both the small and large bowel, are not as specific as the colon, which is the focus of this particular test. Therefore, the correct answer highlights the main target area for the Barium enema procedure, which is the colon.