The term that defines the amount of power produced by an ultrasound unit is?

The term that defines the amount of power produced by an ultrasound unit is?

• A. Frequency
• B. Wavelength
• C. Intensity
• D. Amplitude

Answer: (C)

In ultrasound therapy, the amount of power delivered to tissue is described by intensity—the power per unit area carried by the beam. This tells you how much energy enters tissue each second for every square centimeter, usually measured in W/cm^2. Frequency, which is how many vibration cycles occur each second, affects penetration depth and heating rate but not the actual energy delivered per area. Wavelength is the distance a wave travels in one cycle and depends on tissue speed and frequency, and it doesn’t quantify power. Amplitude represents how much the wave oscillates (the maximum displacement or pressure) but, by itself, isn’t the standard measure of the unit’s power output; intensity integrates those factors to describe energy delivery. Clinicians adjust intensity to control the therapeutic dose, and total power equals intensity times the beam area.

In ultrasound therapy, the amount of power delivered to tissue is described by intensity—the power per unit area carried by the beam. This tells you how much energy enters tissue each second for every square centimeter, usually measured in W/cm^2. Frequency, which is how many vibration cycles occur each second, affects penetration depth and heating rate but not the actual energy delivered per area. Wavelength is the distance a wave travels in one cycle and depends on tissue speed and frequency, and it doesn’t quantify power. Amplitude represents how much the wave oscillates (the maximum displacement or pressure) but, by itself, isn’t the standard measure of the unit’s power output; intensity integrates those factors to describe energy delivery. Clinicians adjust intensity to control the therapeutic dose, and total power equals intensity times the beam area.