SPI EXAM STUDY QUESTIONS & VERIFIED
CORRECT ANSWERS RATED 100% CORRECT
ANSWERS
1. Doppler shift A change or difference
in
the frequency of
sound as a result of
motion be- tween the
sound source and the
receiver
2. Greater create greater Doppler shifts. Velocities
3. What does Doppler measure? Frequency shift, NOT
am- plitude
4. Unit of doppler HErtz, cycles per second
5. Which of the following circumstances is most likely to A highly
attenuating struc-
create a shadowing artifact? ture located at a
shallower depth than
the artifact
6. What is the MHz of transducers are used for Doppler? 2MHz-
10MHz
7. Doppler shift= - Received
frequency -
transmitted
frequency
8. Doppler equation Doppler shift = 2 x
reflec- tor speed x
incident fre- quency
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29
,SPI EXAM STUDY QUESTIONS & VERIFIED
CORRECT ANSWERS RATED 100% CORRECT
ANSWERS
x cos (angle) /
propagation speed
9. Doppler shift is directly related to: Blood cell speed,
frequen- cy of
transducer, cosine of
the angle between
flow and the sound
beam
10. Doppler shift is to the speed of sound Inversely related
in the medium
2/
29
, SPI EXAM STUDY QUESTIONS & VERIFIED
CORRECT ANSWERS RATED 100% CORRECT
ANSWERS
11. What does the 2 in the doppler shift Double doppler shift.
equation repre- sent? The first occurs when
the sound strikes the
blood cell. The second
shift re- sults from
sound wave re-
flecting off the moving
blood cell and
returning back to the
transducer
12. What must be known is order to accurately determine The angle
between the di-
velocity rections of flow and the
? sound beam
13. Doppler measures not Velocity, speed
14. Speed is only and velocity is and Magnitude,
magnitude
and direction
15. At 90 degrees the measured velocity is Zero
because the cosine of 90
is
16. How many crystals in a CW doppler transducer? Two
17. Advantage of CW doppler High velocities are
accu- rately
3/
29
CORRECT ANSWERS RATED 100% CORRECT
ANSWERS
1. Doppler shift A change or difference
in
the frequency of
sound as a result of
motion be- tween the
sound source and the
receiver
2. Greater create greater Doppler shifts. Velocities
3. What does Doppler measure? Frequency shift, NOT
am- plitude
4. Unit of doppler HErtz, cycles per second
5. Which of the following circumstances is most likely to A highly
attenuating struc-
create a shadowing artifact? ture located at a
shallower depth than
the artifact
6. What is the MHz of transducers are used for Doppler? 2MHz-
10MHz
7. Doppler shift= - Received
frequency -
transmitted
frequency
8. Doppler equation Doppler shift = 2 x
reflec- tor speed x
incident fre- quency
1/
29
,SPI EXAM STUDY QUESTIONS & VERIFIED
CORRECT ANSWERS RATED 100% CORRECT
ANSWERS
x cos (angle) /
propagation speed
9. Doppler shift is directly related to: Blood cell speed,
frequen- cy of
transducer, cosine of
the angle between
flow and the sound
beam
10. Doppler shift is to the speed of sound Inversely related
in the medium
2/
29
, SPI EXAM STUDY QUESTIONS & VERIFIED
CORRECT ANSWERS RATED 100% CORRECT
ANSWERS
11. What does the 2 in the doppler shift Double doppler shift.
equation repre- sent? The first occurs when
the sound strikes the
blood cell. The second
shift re- sults from
sound wave re-
flecting off the moving
blood cell and
returning back to the
transducer
12. What must be known is order to accurately determine The angle
between the di-
velocity rections of flow and the
? sound beam
13. Doppler measures not Velocity, speed
14. Speed is only and velocity is and Magnitude,
magnitude
and direction
15. At 90 degrees the measured velocity is Zero
because the cosine of 90
is
16. How many crystals in a CW doppler transducer? Two
17. Advantage of CW doppler High velocities are
accu- rately
3/
29
