Which is an advantage of ultrasound compared to CT and MRI?

• A. Higher image resolution
• B. No use of ionizing radiation
• C. Ability to scan in real-time
• D. Greater depth of tissue penetration

Answer: (B)

Ultrasound offers a significant advantage over CT and MRI due to the absence of ionizing radiation. This characteristic makes ultrasound a safer imaging option, particularly for vulnerable populations such as pregnant women and children. Unlike CT scans, which utilize X-rays and can expose patients to potentially harmful radiation, ultrasound relies on sound waves, making it non-invasive and devoid of the associated risks of radiation exposure.

This feature allows for repeated imaging, if necessary, without the concern of cumulative radiation dose, enabling healthcare providers to monitor conditions more closely over time. The safety profile of ultrasound is especially important in scenarios where numerous follow-up assessments are needed, making it a preferred imaging modality in many clinical settings.