What is the primary diagnostic tool for diverticulitis?

The primary diagnostic tool for diverticulitis is a CT scan, which is considered the gold standard for this condition. A CT scan provides detailed cross-sectional images of the abdomen that can effectively identify inflamed diverticula, complications such as abscesses or perforations, and assess the severity of the disease. The high sensitivity and specificity of CT imaging make it the preferred option for confirming a diagnosis of diverticulitis.

In contrast, while an abdominal ultrasound can be used in certain clinical situations, it is less definitive and may miss complications that CT scans can readily identify. X-rays have limited utility in diagnosing diverticulitis, as they do not provide the necessary detail to visualize the condition accurately. Similarly, MRI is not routinely used for intestinal conditions like diverticulitis due to availability, cost, and the typical need for rapid diagnosis—CT is faster and more commonly accessible in acute settings.