Abdominal aortic aneurysm is commonly identified through which modality?

• A. Ultrasound (US)
• B. Electrocardiography
• C. Spirometry
• D. Urinalysis

Answer: (A)

Abdominal ultrasound provides direct visualization and measurement of the aorta, making it the modality most used to identify abdominal aortic aneurysm. It’s noninvasive, lacks radiation, is relatively inexpensive, and can be performed quickly and widely, allowing accurate assessment of the aortic diameter to detect an aneurysm (typically defined as a diameter of 3 cm or greater). If an aneurysm is found, CT angiography or MRI is usually used next for detailed anatomy and planning, but ultrasound is the screening tool that identifies the problem.

Electrocardiography assesses heart rhythm and electrical activity, not the aorta. Spirometry measures lung function. Urinalysis checks urine and kidneys but does not image the aorta.