Increased tissue heating could occur when you:

Increased tissue heating could occur when you:

• A. Decrease frequency.
• B. Increase transmit power.
• C. Decrease exposure time.
• D. Decrease pulse repetition frequency.

Answer: (B)

More tissue heating happens when you deliver more acoustic energy to the tissue. Transmit power sets how intense each ultrasound pulse is; turning it up increases the energy per pulse and how much of that energy tissue can absorb. The absorbed energy turns into heat, so higher transmit power directly raises tissue temperature. Reducing exposure time or decreasing the pulse repetition frequency lowers the total energy delivered, and decreasing frequency generally reduces energy absorption in tissue, so they wouldn’t cause more heating.

More tissue heating happens when you deliver more acoustic energy to the tissue. Transmit power sets how intense each ultrasound pulse is; turning it up increases the energy per pulse and how much of that energy tissue can absorb. The absorbed energy turns into heat, so higher transmit power directly raises tissue temperature. Reducing exposure time or decreasing the pulse repetition frequency lowers the total energy delivered, and decreasing frequency generally reduces energy absorption in tissue, so they wouldn’t cause more heating.