Suspected acute colon diverticulitis: imaging with low-dose unenhanced multi-detector row CT

Area of Science:

• Radiology
• Medical Imaging
• Gastroenterology

Background:

• Acute diverticulitis is a common condition requiring accurate diagnosis.
• Standard-dose contrast-enhanced computed tomography (CT) is often used but involves radiation exposure and contrast material.
• Developing lower-radiation imaging techniques is crucial for patient safety.

Purpose of the Study:

• To compare the diagnostic performance of unenhanced low-dose multi-detector row CT versus contrast-enhanced standard-dose multi-detector row CT for acute diverticulitis.
• To evaluate sensitivity and specificity differences between the two CT techniques.

Main Methods:

• A prospective study included 110 patients with suspected acute diverticulitis.
• Patients underwent both unenhanced low-dose CT and contrast-enhanced standard-dose CT.
• Scans were independently reviewed by multiple readers, with results compared against colonoscopy, surgery, and pathology.

Main Results:

• No significant differences in sensitivity or specificity were found between low-dose unenhanced CT and standard-dose contrast-enhanced CT for overall diagnosis.
• Retroperitoneal fat stranding was the most significant indicator for acute diverticulitis on both CT protocols.
• One reader noted higher specificity for wall thickening on low-dose CT.

Conclusions:

• Unenhanced low-dose multi-detector row CT demonstrates comparable diagnostic performance to contrast-enhanced standard-dose CT in patients with suspected acute diverticulitis.
• Low-dose CT offers a viable alternative, potentially reducing radiation exposure without sacrificing diagnostic accuracy.