Exam (elaborations)
ARDMS SPI Practice Test A with 100% correct answers | verified | latest update 2024
ARDMS SPI Practice Test A with 100% correct answers | verified | latest update 2024
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ARDMS SPI Practice Test AAccording to ALARA (as low as reasonably achievable) guidelines, which
parameter should be minimized?
A.transmit power
B.frequency
✅
C.time gain compensation
D.overall gain - CORRECT ANSWER- A.transmit power
An increase in which parameter will improve the accuracy of velocity
measurements with autocorrelation?
A.color field of view
B.packet size
✅
C.wall filtering
D.transmitted frequency - CORRECT ANSWER- B.packet size
How is lateral resolution determined for a pulsed-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 - CORRECT ANSWER- A.by observing spaces between reflectors
perpendicular to the beam
The center frequency of a transducer depends primarily upon which
characteristics of the crystal?
A.width
B.length
✅
C.spacing
D.thickness - CORRECT ANSWER- D.thickness
To which acoustic variable is penetration depth inversely related?A.frequency
B.wavelength
✅
C.period
D.propagation speed - CORRECT ANSWER- A.frequency
, What affects the beam width in the near field?
A.Pulse repetition frequency
B.Pulse duration
✅D.Transducer aperture
C.Frame rate
D.Transducer aperture - CORRECT ANSWER-
What does coded excitation improve in addition to penetration?
A.lateral resolution
B.signal-to-noise ratio
✅
C.frame rate
D.dynamic range - CORRECT ANSWER- B.signal-to-noise ratio
What is an advantage of using pulsed wave doppler compared to continuous
wave doppler?
A.higher echo sensitivity
B.ability to select sample depth
✅
C.decreased display of aliasing
D.improved temporal resolution - CORRECT ANSWER- B.ability to select
sample depth
What is demonstrated in this image produced by a linear array transducer 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. - CORRECT ANSWER- C. Transducer
crystals are damaged.
What is dynamic aperture?
A.aperture that varies with transmit frequency
B.aperture that decreases as a function of time
C.aperture that increases with increasing focal length
✅
D.aperture that changes as a function of frame rate - CORRECT
ANSWER- C.aperture that increases with increasing focal length
What is the advantage of using pulsed-wave doppler versus continuous-wave
doppler?
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