Which of the following is an advantage of ultrasound?

• A. Real-time images
• B. All of the above
• C. Cheaper than CT / MRI
• D. Portable

Answer: (B)

The main idea here is that ultrasound offers multiple practical advantages, and these together make the “all of the above” option the best choice. Real-time imaging lets you see structures as they move and change, which is invaluable for dynamic assessment, guiding procedures, and evaluating blood flow with Doppler. It’s typically cheaper than CT or MRI because the equipment and operational costs are lower, and exams can be quicker since there’s no need for fixed facilities or lengthy scanning protocols. Its portability means ultrasound machines can be brought to the patient—at bedside in the ER, on the ward, or in remote settings—facilitating rapid decision-making. All these factors together explain why choosing the option that includes all these advantages is most appropriate.