Reducing the likelihood of bioeffects from acoustic energy is the mission of the:
A. Nyquist limit
B. Reynolds number
C. Huygens principle
D. ALARA principle
E. Poiseuille principle -answer- D. ALARA principle
The number of cycles in a pulse directly related to the:
A. Duty factor...
SPI mock exam study questions and
answers 2024
Reducing the likelihood of bioeffects from acoustic energy is the mission of the:
A. Nyquist limit
B. Reynolds number
C. Huygens principle
D. ALARA principle
E. Poiseuille principle -answer-✔ D. ALARA principle
The number of cycles in a pulse directly related to the:
A. Duty factor
B. SPL
C. operating frequency
D. PRF
E. propagation speed of the medium -answer-✔ B. SPL
The Doppler shift frequency is proportional to the:
A. Cosine values
B. Doppler angle
C. Operating frequency
D. Velocity of the reflector
E. Propagation speed if the medium -answer-✔ D. Velocity of the reflector
In the Fraunhofer zone, the beam:
A. Width diverges
B. Is conical in shape
C. Intensity is greatest
D. Intensity is inconsistent
E. Widens towards the focal zone -answer-✔ A. Width diverges
Artifacts consisting of parallel equally spaced lines are characteristic of:
A. Multipath
B. Grating lobes
C. Reverberation
D. Range ambiguity
E. Acoustic shadowing -answer-✔ C. Reverberation
,An increase in reflection amplitudes from reflectors that lie behind a weakly attenuating
structure is called:
A. Comet tail artifact
B. Shadowing
C. Slice thickness artifact
D. Acoustic enhancement
E. Propagation speed error -answer-✔ D. Acoustic enhancement
The ratio of the largest power to the smallest power the ultrasound system can handle
describes:
A. Amplitude
B. Bandwidth
C. Compensation
D. Dynamic range
E. Contrast resolution -answer-✔ D. Dynamic range
Axial resolution directly related to the:
A. Penetrating depth
B. SPL
C. Temporal resolution
D. Tx diameter
E. Operating frequency -answer-✔ E. Operating frequency
When voltage is applied to the piezoelectric crystal, the crystal will:
A. Vibrate
B. Increase in size
C. Decrease in size
D. Remain unchanged
E. Increase or decrease according to the polarity -answer-✔ E. Increase or decrease
according to the polarity
The resistance of the arterioles accounts for about what percentage of the total
systemic resistance?
A. 10%
B. 25%
C. 33%
D. 30%
E. 75% -answer-✔ D. 30%
Rayleigh scattering is most likely to occur when encountering the:
, A. Liver
B. Pleura
C. Diaphragm
D. RBC
E. Urinary bladder -answer-✔ D. RBC
Which color always represents the baseline in color Doppler imaging?
A. Red
B. Blue
C. White
D. Black
E. Ywllow -answer-✔ D. Black
Which of the following correctly defines acoustic frequency?
A. Length of one cycle
B. Number of pulses in a cycle
C. Number of cycles in a second
D. Strength of the compression wave
E. Amount of time to complete one cycle -answer-✔ C. Number of cycles in a second
What component is not present in A-mode but is necessary for B-mode imaging?
A. Clock
B. Display
C. Amplifier
D. Transducer
E. Scan converter -answer-✔ E. Scan converter
Graying lobes are caused by:
A. High frame rates
B. Dynamic focusing
C. Reverberation artifact
D. Interference phenomenon
E. Spacing of array elements -answer-✔ E. Spacing of array elements
Clutter can be reduced using which of the following controls?
A. Wall filter
B. Smoothing
C. Baseline shift
D. Dynamic range
E. PRF -answer-✔ A. Wall filter
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