In continuous wave ultrasound, which two temporal intensities are equal?

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Multiple Choice

In continuous wave ultrasound, which two temporal intensities are equal?

Explanation:
In continuous wave ultrasound the beam is on continuously, so the intensity at a given point in time does not fluctuate. Since the signal is unchanging over time, the value at any instant is the same as its average over time. That means the temporal peak intensity and the temporal average intensity are the same. This contrasts with pulsed ultrasound, where the beam is only on for part of the time, causing the temporal peak to be higher than the temporal average due to a duty cycle less than 1.

In continuous wave ultrasound the beam is on continuously, so the intensity at a given point in time does not fluctuate. Since the signal is unchanging over time, the value at any instant is the same as its average over time. That means the temporal peak intensity and the temporal average intensity are the same. This contrasts with pulsed ultrasound, where the beam is only on for part of the time, causing the temporal peak to be higher than the temporal average due to a duty cycle less than 1.

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