Which duty cycle values indicate pulsed ultrasound?

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Prepare for the BOC Domain 4 Treatment and Rehab Test. Access study materials like flashcards and multiple choice questions with explanations. Enhance your understanding and be ready to ace the exam!

Multiple Choice

Which duty cycle values indicate pulsed ultrasound?

Explanation:
Duty cycle is the fraction of time the ultrasound is actually emitting during one cycle. Pulsed ultrasound emits in bursts with off intervals, so the duty cycle is greater than zero but less than 100%. Values like 20% and 50% clearly show on-and-off activity, which is what defines pulsed emission. A value of 0% means no emission at all, while 100% means continuous emission with no pause, not pulsed. Among the choices, 20% and 50% best illustrate the pulsed pattern by having definite “on” times separated by pauses.

Duty cycle is the fraction of time the ultrasound is actually emitting during one cycle. Pulsed ultrasound emits in bursts with off intervals, so the duty cycle is greater than zero but less than 100%. Values like 20% and 50% clearly show on-and-off activity, which is what defines pulsed emission. A value of 0% means no emission at all, while 100% means continuous emission with no pause, not pulsed. Among the choices, 20% and 50% best illustrate the pulsed pattern by having definite “on” times separated by pauses.

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