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ARDMS SPI STUDY GUIDE QUESTIONS
WITH DETAILED VERIFIED ANSWERS
(100% CORRECT ANSWERS)
3 dB results in doubling of intensity (or power)
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increase in rbc velocity increases Doppler shift
, Clinical
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transducers
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their
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Low
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the
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create
itare
from
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travels
beam
arranged
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the
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produce
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transducer
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alsoanreferred
surface
image to
on
travels
to
the
into
as
transducer
the
display
the ultrasound
SP/SA
through
propagation
technology
factor
tissue.
beam
ormedium,
beam
to piezoelectric
uniformity
and exhibits
materials
coefficient
two distinct beam
patterns: - a slightly converging beam out to a distance
specified by the geometry and frequency of the transducer (the
near field), and - a diverging beam beyond that point (the far
field).
As imaging depth increase, pulse repeition freqency (PRF)
decreases.
↑ Imaging Depth ↓ PRF
How3 dB
3MHz
Doppler
period
deep
gain
sound
wave
is(high
isthe
would
location
islength
beam
pass
traveling
indicate
filter)
travels
A?
of time
-inan
correct
eliminates?
the
through
itincrease
takes
bodyanswer-
two
for
and
in- intensity
media.
correct
propagates
- correct
ItLocation
by:
answer-
attenuates
answer-
from
- A is 5
correct
dB
high
one
10
muscle
cm
incomplete
amplitude
medium
from
toanswer-
air.
theWhat
wavelength
Asignals,
transducer
andpercentage
6 Two
dBlow
into
Times
velocity
medium
passof athe
fixed
flow
B.sound
-point
correct
wave isanswer-
most
Total attentuation
likely reflected at the is 11
muscle-air
dB boundary? - correct
answer- 75%
ARDMS SPI STUDY GUIDE QUESTIONS
WITH DETAILED VERIFIED ANSWERS
(100% CORRECT ANSWERS)
3 dB results in doubling of intensity (or power)
Attenuation simply adds up as sound travels.
A sound pulse travels from the transducer to location A, reflects
off of it, and returns to the transducer in 130 μs.
Total travel distance would be 20 cm
,Asstrongly
A
Acoustic
Along
Amplitude
An
Areas
imaging
increase
ultrasound
of
withhigh
Variables
focused
crystal
image
depth
-incorrect
pressure
pulse
red
the
transducer
Acoustic
increases,
depth,
diameter,
number
blood
transducer
-repetition
correct
answer-
and
Speckle
cell
which
converts
of
density
the
the
velocity
pixels
implies
answer-
frequency
of
pulse
divergence
-the
are
correct
on
The
-will____________Doppler
correct
following
a:
repetition
referred
the
maximum
would
- display
correct
changes
in
answer-
the
answer-
to
also
lead
frequency
will
as:
far
oranswer-
determines
that
to:
minimum
field
improve:
- correct
occur
-the
is(PRF)
also
interference
Short
within
determined
the
deviation
correct
-Shift:
Electrical
answer-
must:
correct
frame
focal
-a- correct
medium
correct
answer-
energy
of
rate?
answer-
length
by...
an
Compressions
acoustic
pattern
into
-answer-
as
answer-
and
-correct
correct
a Mechanical
result
Increasing
Increased
caused
Detail
variable
answer-
ofanswer-
Resolution
sound
Increase
by
Decrease
from
Beam
pulse
energy
scatterers
traveling
the
Divergence
repetition
and
Image
average
Frequency
that
vice
through
depth
produces
versa
value and
that
of the
that
the granular
medium of
number
variable;
frequency, thelines
increases
strength
appearance
per frame
duty
of the
factor.
determines
of
reflector
tissue onthe a sonographic
frame rate. image
and crystal diameter determines the divergence in the far field
↑ PRF ↑ Duty Factor
increase in rbc velocity increases Doppler shift
, Clinical
Attenuation
Axial
B-mode
Backscatter
Beam
Capacitive
Resolution
Properties
Uniformity
imaging
displays
Micromachined
Coefficient
denotes
-- correct
correct
transducers
reflector:
Ratio
--correct
correct
- answer-
correct
answer-
-- correct
correct
Ultrasound
-answer-
are:
answer-
correct
answer-
- answer-
answer-
correct
Scattered
Aanswer-
Transducers
decrease
The
Theanswer-
ability
Progressive
ultrasound
sound
The
The
in the
Amplitude
to
-ratio
rate
waves
correct
at
beam
of
Wide
the
that
amplitude
which
weakening
accurately
and
make
propagates
center
answer-
bandwidth;
Distance
their
sound
intensity
and
identify
way
of
as
Low
is
Technology
the
aintensity
attenuated
back
to
longitudinal
Qsound
factor
the
reflectors
toaverage
the
of
beam
used
the
per
transducer
wave
that
as
to
sound
unit
spatial
create
itare
from
depth
travels
beam
arranged
intensity;
and
the
comparable
produce
as
transducer
sound
parallel
alsoanreferred
surface
image to
on
travels
to
the
into
as
transducer
the
display
the ultrasound
SP/SA
through
propagation
technology
factor
tissue.
beam
ormedium,
beam
to piezoelectric
uniformity
and exhibits
materials
coefficient
two distinct beam
patterns: - a slightly converging beam out to a distance
specified by the geometry and frequency of the transducer (the
near field), and - a diverging beam beyond that point (the far
field).
As imaging depth increase, pulse repeition freqency (PRF)
decreases.
↑ Imaging Depth ↓ PRF
