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Intensities

Chapter 5 in Edelman

QuestionAnswer
Intensity A beam's power divided by it's area
True or false: intensities may be reported in various ways with respect to time and space. True
True or false: the different measurements of intensities are important in the study of bioeffects. True
The most relevant intensity with respect to tissue heating is SPTA (spacial peak temporal average)
The units for all intensities are Watts/cm squared
True or false: because peak measurements are larger than average measurements, SPTP intensity has the highest value and SATA has the lowest value True
The SP/SA factor, also called the beam uniformity coefficient, is Unitless with a value of 1 or greater
The duty factor describes the relationship of beam intensities with time, is unitless and has a value between 0 and 1.
True or false: In continuous wave, there is no listening time, so pulse average and temporal average are the same. True SPTA=SPPA and SATA=SAPA
True or false: when pulsed and continuous wave sound beams have the same SPTP intensities, the continuous wave beam has the higher SPTA intensity. True
True or false: when pulsed and continuous wave sound beams have the same SATP intensities, the continuous wave beam has the higher SATA intensity. True
The rank of intensities from largest to smallest: SPTP->Im->SPPA->SPTA->SATA
Created by: gillybruursema
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