Terms in this set (1704)
What action below would be C: Complete the diagnostic scan in a timely fashion at the lowest
most in keeping with the ALARA output power that achieves a quality image.
principle while performing a
diagnostic ultrasound
examination?
A: Allow multiple students to scan
an obstetrical patient because the
fetus is in a good position for
imaging.
B: Prolong the sonogram to make
videos of the fetus for each family
member.
C: Complete the diagnostic scan in a
timely fashion at the lowest output
power that achieves a quality
image.
D: Maximize the acoustic output
to brighten the overall image.
E: Extend the sonogram beyond the
intended scope of the exam
requisition.
What does the ALARA principle As Low As Reasonable Achievable
stand for?
During performance of an D: Increase transmit power
obstetrical ultrasound exam you
adjust the system
parameters to improve the image.
Which of the following
parameters would increase
acoustic exposure?
A: Increase
gain B:
Increase TGC
C: Increase frequency
D: Increase transmit
,power E: Increase
frame averaging
, While performing a sonogram to A: Use M-mode instead of pulsed-wave Doppler to measure the fetal heart
minimize risk to the fetus which rate.
imaging mode trade off would be
most applicable?
A: Use M-mode instead of
pulsed-wave Doppler to measure
the fetal heart rate. B: Use color
Doppler instead of power
Doppler to image the umbilical
cord.
C: Use pulsed-wave Doppler
instead of power Doppler to
evaluate the fetal heart. D: Use
harmonics instead of fundamental
to image the fetal spine.
E: All of the above.
Gain, TGC, and frame averaging -Sound transmission
do not affect and therefore -Exposure
do not affect
_______.
T or F: Increasing frequency does True
not increase exposure.
What potential bioeffect occurs B: Heating
through absorption of sound
energy by tissue? A: Cavitation
B: Heating
C:
Attenuatio
n D:
Reflection
E:
Refraction