MSAT 6400- EXAM 1 QUESTIONS AND ANSWERS WITH
COMPLETE SOLUTIONS VERIFIED LATEST UPDATE
Which part of the ultrasound device houses the crystal?
Transducer
Which of the following tissues is ultrasound absorbed the most efficiently?
Superficial bone
What ultrasound frequency has the highest rate of absorption (heating)?
3 MHz
The process of a crystal converting to electrical energy into acoustic energy is
known as what?
Reverse Piezoelectric Effect
Which ultrasound characteristic describes the amount of variability of intensity
within the beam?
Beam nonuniformity ration (BNR)
Unidirectional movement of fluids surrounding the cell membrane from
ultrasound is defined as what mechanical effect?
Acoustic streaming
Which of the following ultrasound parameters determines the depth of
penetration?
Frequency
, If the spatial average intensity (SAI) of the ultrasound unit is set to 2.0 W/cm2,
and the duty cycle is 50%, what is the true average intensity (temporal average
intensity) of the treatment?
1.0 W/cm2
What is the appropriate treatment area for an ultrasound treatment?
2x the area of the soundhead
Which ultrasound characteristics describes the portion of the transducer that
actually produces the soundwave?
Effective radiating are (ERA)
Which of the following is NOT a type of diathermy?
Shockwave
What is the most common frequency used with shortwave diathermy?
27.12 MHz
What is the largest con of induction sleeve application (Rebound device)?
It's shallower penetration than induction drum application
The rotation of molecules due to changing polarity of eddy currents is known as
what?
Dipole effect
The greatest amount of heating from an induction drum occurs in which of the
following tissues?
Muscle
The amount of heating from shortwave diathermy is determined by the following
factors, except:
COMPLETE SOLUTIONS VERIFIED LATEST UPDATE
Which part of the ultrasound device houses the crystal?
Transducer
Which of the following tissues is ultrasound absorbed the most efficiently?
Superficial bone
What ultrasound frequency has the highest rate of absorption (heating)?
3 MHz
The process of a crystal converting to electrical energy into acoustic energy is
known as what?
Reverse Piezoelectric Effect
Which ultrasound characteristic describes the amount of variability of intensity
within the beam?
Beam nonuniformity ration (BNR)
Unidirectional movement of fluids surrounding the cell membrane from
ultrasound is defined as what mechanical effect?
Acoustic streaming
Which of the following ultrasound parameters determines the depth of
penetration?
Frequency
, If the spatial average intensity (SAI) of the ultrasound unit is set to 2.0 W/cm2,
and the duty cycle is 50%, what is the true average intensity (temporal average
intensity) of the treatment?
1.0 W/cm2
What is the appropriate treatment area for an ultrasound treatment?
2x the area of the soundhead
Which ultrasound characteristics describes the portion of the transducer that
actually produces the soundwave?
Effective radiating are (ERA)
Which of the following is NOT a type of diathermy?
Shockwave
What is the most common frequency used with shortwave diathermy?
27.12 MHz
What is the largest con of induction sleeve application (Rebound device)?
It's shallower penetration than induction drum application
The rotation of molecules due to changing polarity of eddy currents is known as
what?
Dipole effect
The greatest amount of heating from an induction drum occurs in which of the
following tissues?
Muscle
The amount of heating from shortwave diathermy is determined by the following
factors, except:
