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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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 with targeted flashcards and comprehensive questions. Grasp concepts with detailed hints and explanations to boost your exam readiness!

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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