What is the most utilized screening method for identifying abdominal aortic aneurysm (AAA)?

Ultrasound is the most utilized screening method for identifying abdominal aortic aneurysm (AAA) due to its accessibility, feasibility, and safety profile. It is particularly advantageous because it does not involve ionizing radiation, making it suitable for a wide range of patients, including those who may require repeat examinations over time.

Ultrasound is also highly effective in visualizing the size and presence of an AAA. The technique is relatively quick to perform and can be administered in an outpatient setting with results available immediately, which is particularly beneficial for screening purposes. The ease of use and ability to provide real-time imaging further contribute to its prominence as a preferred screening tool in various clinical settings.

While CT scans are also a valuable tool for diagnosing AAA, particularly for more detailed evaluations, they are generally utilized after an initial ultrasound screening if further clarification is needed. X-ray is not typically effective for diagnosing AAA as it does not provide the necessary details of the aorta's morphology. MRI, though useful in certain scenarios, is less commonly employed due to availability, cost, and longer examination times compared to ultrasound.