Higher intensity results in higher tissue temperature.

• A. No change
• B. Higher
• C. Lower
• D. Variable

Answer: (B)

The main idea is that tissue heating from ultrasound depends on how much energy is delivered to the tissue. Intensity is the amount of acoustic energy delivered per unit area per unit time. If you increase intensity while keeping duration and tissue properties the same, more energy is deposited per second, so more energy is converted to heat and the tissue temperature rises. Tissue type and absorption affect how much of that energy becomes heat, and factors like blood flow can offset heating, but the fundamental relationship remains: higher intensity tends to produce a higher temperature rise. That’s why the best answer is the one stating higher.