SPI Practice Exam Questions and Answers
(100% Correct Answers) Already Graded A+
Which term describes blood flow changes in response to
respiration?
A. Phasic
B. Parabolic
C. Spontaneous
D. Pulsatile [ Ans: ] Phasic
What is demonstrated in this image produced by a linear
array to placed on a uniform tissue-mimicking phantom?
A. Time gain compensation not set properly.
B. System has low dynamic range.
C. Transducer crystals are damaged.
D. Focus control is malfunctioning. [ Ans: ] Transducer
crystals are damaged
What is dynamic aperture?
A. Aperture that varies with transmit frequency
B. Aperture that deceases as a function of time
,C. Aperture that increases with increasing focal length
D. Aperture that changes as a function of frame rate [ Ans:
] Aperture that increases with increasing focal length
Which variable can cause an acoustic shadow artifact?
A. Small acoustic impedance mismatch
B. Refraction
C. Perpendicular incidence
D. Low attenuation [ Ans: ] Small acoustic impedance
mismatch
What control improved the effects of attenuation?
A. Dynamic range
B. Pulse Inversion
C. Multiple focal zones
D. TGC [ Ans: ] TGC
What is the potential effect of increasing the PRF?
A. Depth ambiguity
B. Decreased frame rate
, C. Poor spatial resolution
D. Decreased penetration [ Ans: ] Decreased penetration
How is lateral resolution determined for a pulse-echo
system using a tissue-mimicking test object?
A. By observing spaces between reflectors perpendicular
to the beam
B. By observing spaces between reflectors along the beam
path
C. By observing position of deepest visible reflector along
the beam path
D. By observing position of deepest visible reflector
perpendicular to the beam path [ Ans: ] By observing
spaces between reflectors perpendicular to the beam
According to ALARA guidelines, which parameter should
be minimized?
A. Transmit power
B. Frequency
C. TGC
D. Overall gain [ Ans: ] Transmit power
(100% Correct Answers) Already Graded A+
Which term describes blood flow changes in response to
respiration?
A. Phasic
B. Parabolic
C. Spontaneous
D. Pulsatile [ Ans: ] Phasic
What is demonstrated in this image produced by a linear
array to placed on a uniform tissue-mimicking phantom?
A. Time gain compensation not set properly.
B. System has low dynamic range.
C. Transducer crystals are damaged.
D. Focus control is malfunctioning. [ Ans: ] Transducer
crystals are damaged
What is dynamic aperture?
A. Aperture that varies with transmit frequency
B. Aperture that deceases as a function of time
,C. Aperture that increases with increasing focal length
D. Aperture that changes as a function of frame rate [ Ans:
] Aperture that increases with increasing focal length
Which variable can cause an acoustic shadow artifact?
A. Small acoustic impedance mismatch
B. Refraction
C. Perpendicular incidence
D. Low attenuation [ Ans: ] Small acoustic impedance
mismatch
What control improved the effects of attenuation?
A. Dynamic range
B. Pulse Inversion
C. Multiple focal zones
D. TGC [ Ans: ] TGC
What is the potential effect of increasing the PRF?
A. Depth ambiguity
B. Decreased frame rate
, C. Poor spatial resolution
D. Decreased penetration [ Ans: ] Decreased penetration
How is lateral resolution determined for a pulse-echo
system using a tissue-mimicking test object?
A. By observing spaces between reflectors perpendicular
to the beam
B. By observing spaces between reflectors along the beam
path
C. By observing position of deepest visible reflector along
the beam path
D. By observing position of deepest visible reflector
perpendicular to the beam path [ Ans: ] By observing
spaces between reflectors perpendicular to the beam
According to ALARA guidelines, which parameter should
be minimized?
A. Transmit power
B. Frequency
C. TGC
D. Overall gain [ Ans: ] Transmit power
