Intensities Flashcards
Intensities can be reported in various ways in regard to _____ and _____.
Time; space
The different measurements of intensities are important when studying?
bioeffects
Which intensity is most relevant with respect to tissue heating?
SPTA (spatial peak temporal average)
What is the unit of all intensities?
W/cm^2
Which intensity has the highest value?
SPTP (spatial peak temporal peak)
Which intensity has the lowest value?
SATA (spatial average temporal average)
The beam uniformity coefficient is also called?
SP/SA factor
What does the beam uniformity coefficient represent?
the spread of the beam in space
The beam uniformity coefficient has a value?
equal to or greater than 1
The duty factor describes?
The relationship of the beam intensities with time
With continuous waves (beam is always “on”), which intensities are always the same?
pulse average and temporal average
The duty factor always has what value?
0-1
Spatial intensity refers to?
distance or space
True or False: An ultrasound beam has the different intensities at different locations
True