ARRT Patient Care Practice Exam

In which conditions is a double contrast barium enema essential for demonstration?

1. Polyps only

2. Polyps and colitis only

3. Polyps and diverticulosis only

4. Polyps, colitis, and diverticulosis

The correct answer is: Polyps and diverticulosis only

A double contrast barium enema is particularly useful for enhancing the visualization of the gastrointestinal tract, specifically the colon. This imaging technique provides excellent detail of the mucosal surface, allowing for the detection and characterization of various conditions. In the context of the conditions listed, polyps are one of the main reasons a double contrast barium enema is performed. This method allows for clearer imaging of polyps as it helps distinguish them from the surrounding mucosa. This is critical because early detection of polyps is essential for preventing colorectal cancer. Diverticulosis can also be better assessed with a double contrast barium enema, as the technique can help reveal small outpouchings of the colon wall, necessary for the diagnosis of this condition. However, while polyps and diverticulosis can be effectively identified, the role of colitis is less defined in the context of needing a double contrast study specifically for diagnosis, as colitis can often be diagnosed with other methods, such as colonoscopy or regular single contrast barium enema. Thus, a double contrast barium enema is essential for demonstrating polyps and diverticulosis, but not as necessary for colitis, highlighting the expertise and decision-making needed in selecting imaging techniques based on