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SU22 PMR Final Exam PQ Questions And 100% Correct Answers
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SU22 PMR Final Exam PQ Questions And 100%Correct Answers
The frequency range for the therapeutic ultrasound is ___________________________.
a. 0.25 - 3.3 MHz
b. 1.05 - 4.0 MHz
c. 0.75 - 3.0 MHz
d. 1.55 - 3.0 MHz
c. 0.75 - 3.0 MHz
__________ refers to the decrease in energy intensity that occurs as a result of the
ultrasound wave being transmitted through various tissue densities, resulting in
scattering and dispersion.
a. Wave deceleration
b. Attenuation
c. Propagation
d. Piezoelectric effect
b. Attenuation
Of the human body mediums listed below, which medium provides the least absorption
ability but the highest penetration ability?
a. Peripheral nerves
b. Adipose tissue
c. Whole blood
d. Water
,d. Water
Of the human body mediums listed below, which medium provides the highest
absorption ability but the lowest penetration ability?
a. Peripheral nerves
b. Adipose tissue
c. Blood plasma
d. Skeletal muscle
d. Skeletal muscle
This tissue interface has the highest percentage of incident energy reflection:
a. Soft tissue/fat
b. Water/soft tissue
c. Soft tissue/air
d. Soft tissue/bone
c. Soft tissue/air
The ______________________ tissue interface has the greatest potential to create a
standing wave or "hot spot".
a. Soft tissue/fat
b. Water/soft tissue
c. Soft tissue/air
d. Soft tissue/bone
d. Soft tissue/bone
A therapeutic ultrasound unit with a BNR of __________ has the greatest potential to
create tissue damage.
a. 2:1
,b. 4:1
c. 6:1
d. 8:1
d. 8:1
The portion of the transudcer surface that actually produces the sound wave is referred
to as the _______________.
a. Piezoelectric crystal area
b. Near field
c. Far field
d. Effective radiating area
d. Effective radiating area
The appropriate size of the treatment area should be no more than _________ the size of
the effective radiating area (ERA) of the crystal.
a. 1-2 times
b. 2-3 times
c. 3-4 times
d. 4-5 times
b. 2-3 times
Which statement below is false concerning the ultrasound beam?
a. An ultrasound beam generated at a frequency of 3 MHz is more divergent than a
frequency of 1MHz
b. An ultrasound beam's sound energy will become more consistent as it moves away
from the transducer
c. A smaller ultrasound head produces a more divergent beam.
d. The far field begins just beyond the point of maximum acoustic intensity
a. An ultrasound beam generated at a frequency of 3 MHz is more divergent than a
, frequency of 1MHz
The maximum intensity occurring in the time of spatially averaged intensity is referred to
as _____________.
a. Temporal peak intensity
b. Spatial peak intensity
c. Spatial-averaged temporal peak intensity
d. Spatial-averaged intensity
c. Spatial-averaged temporal peak intensity
_______________________ ultrasound is most commonly utilized to achieve a thermal
effect on the treated tissues.
a. Pulsed
b. Continuous
c. Spatial-dispersed d. Combination
d. combination
b. Continuous
Therapeutic ultrasound is more effective in providing a deep heating effect than other
thermotherapies because of its ability to penetrate tissues deeper than 1-2cm.
a. True
b. False
a. True
With transverse waves that are created wuth ultrasound, the molecular displacement is
along the direction in which the wave propagates, and also results in molecular
expansion
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