If the ultrasound intensity is set to 1.0 W/cm2 and the BNR is 5:1, what is the peak intensity (SPI)?

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Prepare for the Electrotherapy US Test. Study with quiz questions, flashcards, and explanations for each answer. Enhance your understanding and boost your confidence to excel in your examination!

Multiple Choice

If the ultrasound intensity is set to 1.0 W/cm2 and the BNR is 5:1, what is the peak intensity (SPI)?

The beam nonuniformity ratio (BNR) tells you how much the peak intensity (SPI) can exceed the average intensity (SAI) across the beam. By definition, BNR = SPI / SAI. If the machine is set to 1.0 W/cm^2 and the BNR is 5:1, then the peak intensity is 5 times the average: SPI = 5 × 1.0 = 5.0 W/cm^2. So the highest instantaneous intensity in the beam is 5.0 W/cm^2.

If the ultrasound intensity is set to 1.0 W/cm2 and the BNR is 5:1, what is the peak intensity (SPI)?

Prepare for the Electrotherapy US Test. Study with quiz questions, flashcards, and explanations for each answer. Enhance your understanding and boost your confidence to excel in your examination!

If the ultrasound intensity is set to 1.0 W/cm2 and the BNR is 5:1, what is the peak intensity (SPI)?

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