Which imaging modality provides noninvasive visualization of the coronary arteries to assess atherosclerotic disease?

• A. Echocardiography.
• B. Coronary CT angiography (CCTA).
• C. Nuclear stress test.
• D. Cardiac MRI without contrast.

Answer: (B)

Coronary CT angiography directly visualizes the coronary arteries noninvasively, making it the best choice for assessing atherosclerotic disease. By using iodinated contrast with CT imaging, it creates detailed 3D pictures of the coronary lumen and vessel walls, allowing you to see plaque, determine the degree of stenosis, and characterize plaque composition. This level of direct visualization is what sets it apart from other tests: echocardiography looks at heart structure and function but not the coronary arteries themselves; a nuclear perfusion study assesses blood flow and ischemia rather than anatomy; and cardiac MRI without contrast doesn’t reliably image the coronary lumen. While invasive coronary angiography remains the definitive standard for evaluating coronary anatomy and enabling intervention, coronary CT angiography provides a noninvasive, highly accurate way to assess coronary atherosclerosis in appropriate patients, with considerations like radiation exposure and contrast use guiding its use.