Which diagnostic test is preferred for evaluating diverticulitis?

The preferred diagnostic test for evaluating diverticulitis is a CT scan. This imaging technique is highly effective due to its ability to visualize the colon in detail, allowing for the identification of inflamed diverticula, associated abscesses, or complications such as perforation. The CT scan also provides clear images of surrounding structures, which can aid in assessing the extent of the disease and planning further management.

While ultrasound can be utilized, particularly in certain populations where radiation exposure is a concern, it is generally less sensitive and may not always provide comprehensive details compared to a CT scan. X-rays have limited utility in diagnosing diverticulitis and are not routinely used due to their inability to provide specific details of the condition. Colonoscopy, while useful for visualizing the colon, is contraindicated during an acute episode of diverticulitis due to the risk of perforation and is typically not performed until after the inflammation has resolved. Thus, the CT scan is the most effective and safest method for diagnosing diverticulitis.