Bioeffects/Safety Flashcards
Hydrophones are used to measure:
Pressure or intensity
Calorimeter is calibrated to measure:
Total power in sound beam through process of absorption
Thermocouple is a tiny electronic thermometer placed into:
The sound beam and temp is measured
Temperature rise is indirectly related to amount of power.
T/F
False, directly
What is dosimetry?
Science of identifying and measuring the characteristics of an ultrasound beam that are relevant to its potential for producing biological effects
In vivo means:
In the living
In vitro means:
In glass
Pressure is defined as
Forced divided by area
Pressure measured in:
Pascals
Peak pressures are measured with:
Hydrophone
Power is:
Rate at which work is performed
Watts or milliwatts
What can be used to measure power of ultrasound beam?
Calorimeters
RAdiation force devices
Thermocouple devices
Intensity is:
Power divided by area
W/cm^2 or mW/cm^2
Intensity is measured at:
Or:
Peak value
Average value
Radiation force balance or scale measures intensity or power by:
Measuring force the beam exerts on balance/scale
