ARDMS SPI Practice Test A with
Complete Solutions
Which parameter is most likely to affect spatial resolution?A.dynamic range
B.beam width
C.system sensitivity
D.depth of visualization - ANSWER-D.depth of visualization
When using a 5MHZ transducer, in which tissue is the ultrasound wavelength shortest?
A.fat
B.blood
C.bone
D.muscle - ANSWER-A.fat
What affects the beam width in the near field?
A.Pulse repetition frequency
B.Pulse duration
C.Frame rate
D.Transducer aperture - ANSWER-D.Transducer aperture
Which variable caused the color change from blue to red of the vessel in this image?
A.change in vessel direction
B.color scale set to low
C.turbulent flow
D.severe stenosis - ANSWER-A.change in vessel direction
Which imaging mode requires a broadband transducer?A.continuous wave doppler
B.Pulsed wave doppler
C.color flow imaging
D.harmonic imaging - ANSWER-B.Pulsed wave doppler
Which factor limits image frame rate?
A.transducer operating frequency
B.Sample volume size
C.Speed of sound in tissue
D.Spatial pulse length - ANSWER-C.Speed of sound in tissue
Which imaging modality can provide the most accurate measurement of tumor volume?
A.color doppler
B.B-mode
C.A-mode
, D.M-mode - ANSWER-B.B-mode
What term describes blood flow changes in response to respiration?
A.phasic
B.parabolic
C.spontaneous
D.pulsatile - ANSWER-A.phasic
What is the potential effect of increasing the pulse repetition frequency(PRF)?
A.Depth ambiguity
B.Decreased frame rate
C.Poor spatial resolution
D.Decreased penetration - ANSWER-D.Decreased penetration
Which change would minimize the artifact observed in this image, assuming the pulse
repetition frequency is at its maximum limit?A.adjust the sweep speed
B.adjust the baseline
C.increasing dynamic range
D.increasing the transmitted frequency - ANSWER-B.adjust the baseline
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 -
ANSWER-A.by observing spaces between reflectors perpendicular to the beam
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 - ANSWER-C.aperture that
increases with increasing focal length
What is the advantage of using pulsed-wave doppler versus continuous-wave doppler?
A.allows measurement of higher velocities
B.increases range ambiguity
C.reduces the potential for aliasing
D.provides depth specificity - ANSWER-D.provides depth specificity
What is the doppler shift frequency?
A. recieved ultrasound frequency multiplied by the transmitted ultrasound frequency
B.difference between the transmitted ultrasound frequency and the received ultrasound
frequency
C.sum of the transmitted and received ultrasound frequencies
Complete Solutions
Which parameter is most likely to affect spatial resolution?A.dynamic range
B.beam width
C.system sensitivity
D.depth of visualization - ANSWER-D.depth of visualization
When using a 5MHZ transducer, in which tissue is the ultrasound wavelength shortest?
A.fat
B.blood
C.bone
D.muscle - ANSWER-A.fat
What affects the beam width in the near field?
A.Pulse repetition frequency
B.Pulse duration
C.Frame rate
D.Transducer aperture - ANSWER-D.Transducer aperture
Which variable caused the color change from blue to red of the vessel in this image?
A.change in vessel direction
B.color scale set to low
C.turbulent flow
D.severe stenosis - ANSWER-A.change in vessel direction
Which imaging mode requires a broadband transducer?A.continuous wave doppler
B.Pulsed wave doppler
C.color flow imaging
D.harmonic imaging - ANSWER-B.Pulsed wave doppler
Which factor limits image frame rate?
A.transducer operating frequency
B.Sample volume size
C.Speed of sound in tissue
D.Spatial pulse length - ANSWER-C.Speed of sound in tissue
Which imaging modality can provide the most accurate measurement of tumor volume?
A.color doppler
B.B-mode
C.A-mode
, D.M-mode - ANSWER-B.B-mode
What term describes blood flow changes in response to respiration?
A.phasic
B.parabolic
C.spontaneous
D.pulsatile - ANSWER-A.phasic
What is the potential effect of increasing the pulse repetition frequency(PRF)?
A.Depth ambiguity
B.Decreased frame rate
C.Poor spatial resolution
D.Decreased penetration - ANSWER-D.Decreased penetration
Which change would minimize the artifact observed in this image, assuming the pulse
repetition frequency is at its maximum limit?A.adjust the sweep speed
B.adjust the baseline
C.increasing dynamic range
D.increasing the transmitted frequency - ANSWER-B.adjust the baseline
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 -
ANSWER-A.by observing spaces between reflectors perpendicular to the beam
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 - ANSWER-C.aperture that
increases with increasing focal length
What is the advantage of using pulsed-wave doppler versus continuous-wave doppler?
A.allows measurement of higher velocities
B.increases range ambiguity
C.reduces the potential for aliasing
D.provides depth specificity - ANSWER-D.provides depth specificity
What is the doppler shift frequency?
A. recieved ultrasound frequency multiplied by the transmitted ultrasound frequency
B.difference between the transmitted ultrasound frequency and the received ultrasound
frequency
C.sum of the transmitted and received ultrasound frequencies
