DAVIES SPI REVIEW 2026 1704 QUESTIONS
COMPLETE SOLUTION PREPARATION
RESOURCE ACCURATE CONTENT GRADED
A+
⩥ What does the mechanical index indicate on an ultrasound system?
A. The maximum temperature increase in tissue
B. The minimum temperature increase in tissue
C. Acoustic power in milliwatts
D. The likelihood of cavitation during an ultrasound exam
E. Minutes of exposure time before tissue heating is too great.
Answer: D. The likelihood of cavitation during an ultrasound exam
<Mechanical index is derived from the peak rarefactional pressure and
the ultrasound frequency, parameters shown to be associated with onset
of cavitation>
⩥ Which of the following occurs when you use the maximum system
gain?
A. Increased tissue heating
,B. Increased risk of cavitation
C. Fluid Particle streaming
D. Increased sound absorption
E. None of the above.
Answer: E. None of the above
⩥ When scanning with pulsed-wave Doppler, you would affect the
acoustic exposure by changing which of the following?
A. Doppler gain
B. High pass filter
C. Pulse repetition frequency
D. Baseline position
E. Doppler angle.
Answer: C. Pulse repetition frequency
<The PRF is the number of pulses per second transmitted by the
transducer, which varies with the velocity setting on the spectral display.
Increasing PRF has the potential to increase the acoustic exposure>
⩥ Which of the follow would most likely have the highest SPTA value?
A. CW Doppler
, B. B-mode real-time scanners
C. Static B-mode scanners
D. PW Doppler
E. Fetal monitor Doppler.
Answer: D. PW Doppler
⩥ You are performing a sonographic examination and notice that the
thermal index (TI) is greater than 1. Any increase in temperature would
be greatest in
A. Liver
B. Lung
C. Kidney
D. Bone
E. Bladder.
Answer: B. Bone
⩥ During performance of an obstetric ultrasound exam, you adjust the
system parameters to improve the image. Which of the following
parameters would increase acoustic exposure?
A. Increase receiver gain
B. Increase TGC
COMPLETE SOLUTION PREPARATION
RESOURCE ACCURATE CONTENT GRADED
A+
⩥ What does the mechanical index indicate on an ultrasound system?
A. The maximum temperature increase in tissue
B. The minimum temperature increase in tissue
C. Acoustic power in milliwatts
D. The likelihood of cavitation during an ultrasound exam
E. Minutes of exposure time before tissue heating is too great.
Answer: D. The likelihood of cavitation during an ultrasound exam
<Mechanical index is derived from the peak rarefactional pressure and
the ultrasound frequency, parameters shown to be associated with onset
of cavitation>
⩥ Which of the following occurs when you use the maximum system
gain?
A. Increased tissue heating
,B. Increased risk of cavitation
C. Fluid Particle streaming
D. Increased sound absorption
E. None of the above.
Answer: E. None of the above
⩥ When scanning with pulsed-wave Doppler, you would affect the
acoustic exposure by changing which of the following?
A. Doppler gain
B. High pass filter
C. Pulse repetition frequency
D. Baseline position
E. Doppler angle.
Answer: C. Pulse repetition frequency
<The PRF is the number of pulses per second transmitted by the
transducer, which varies with the velocity setting on the spectral display.
Increasing PRF has the potential to increase the acoustic exposure>
⩥ Which of the follow would most likely have the highest SPTA value?
A. CW Doppler
, B. B-mode real-time scanners
C. Static B-mode scanners
D. PW Doppler
E. Fetal monitor Doppler.
Answer: D. PW Doppler
⩥ You are performing a sonographic examination and notice that the
thermal index (TI) is greater than 1. Any increase in temperature would
be greatest in
A. Liver
B. Lung
C. Kidney
D. Bone
E. Bladder.
Answer: B. Bone
⩥ During performance of an obstetric ultrasound exam, you adjust the
system parameters to improve the image. Which of the following
parameters would increase acoustic exposure?
A. Increase receiver gain
B. Increase TGC
