Temporal average intensity (Ita) is averaged during _______.

Temporal average intensity (Ita) is averaged during _______.

• A. On time only
• B. PRP
• C. Off time
• D. Entire cycle

Answer: (B)

Temporal average intensity reflects the energy delivered over time, taking into account both when the ultrasound is on and when it is off. It is averaged over the pulse repetition period—the full cycle from the start of one pulse to the start of the next. Because there is zero intensity during the off time, this off interval lowers the overall average. In other words, Ita is the average across the entire cycle, not just the emission interval. A convenient way to think of it is Ita equals the on-time intensity multiplied by the duty factor (on-time divided by PRP). This distinguishes Ita from the pulse-averaged value that would be calculated only during the on-time.

Temporal average intensity reflects the energy delivered over time, taking into account both when the ultrasound is on and when it is off. It is averaged over the pulse repetition period—the full cycle from the start of one pulse to the start of the next. Because there is zero intensity during the off time, this off interval lowers the overall average. In other words, Ita is the average across the entire cycle, not just the emission interval. A convenient way to think of it is Ita equals the on-time intensity multiplied by the duty factor (on-time divided by PRP). This distinguishes Ita from the pulse-averaged value that would be calculated only during the on-time.