What is the unit of intensity in ultrasound?

The unit of intensity in ultrasound is Watts per square centimeter (W/cm²). Intensity refers to the power of the ultrasound wave per unit area, which is crucial for assessing the exposure levels during ultrasound applications.

Using this unit allows for a clear understanding of how much energy is transmitted through a specific area, which is essential for evaluating the safety and effectiveness of ultrasound procedures. Intensity is directly related to the biological effects of ultrasound, making it a critical measurement in clinical sonography.

The other units listed do not represent intensity: Pascals (Pa) measure pressure, Hertz (Hz) indicate frequency, and seconds (s) refer to time. Therefore, these units are not applicable when discussing the intensity of ultrasound waves.