Ultrasound is often preferred over CT or MRI because it is generally:

• A. Cheaper and does not use ionizing radiation
• B. More expensive
• C. Non-portable
• D. Only provides static images

Answer: (A)

Ultrasound is favored because it offers a cost-effective, radiation-free imaging option. CT uses ionizing X-ray radiation, which carries exposure risks, while MRI, though not using ionizing radiation, involves expensive equipment, longer scan times, and higher overall costs. Ultrasound machines are typically cheaper and more portable, enabling bedside or point-of-care imaging in many settings. It also provides real-time imaging, so you can observe movement and blood flow, not just static snapshots. Because there’s no ionizing radiation, it’s especially advantageous for groups where radiation exposure is a concern, like pregnant patients and children. The other statements don’t fit because ultrasound is not generally more expensive, it can be portable, and it offers dynamic, real-time imaging rather than only static pictures.