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ARDMS SPI Frequently Asked Questions
Question # 1
What is the benefit of using a wall filter?
A. Reduces aliasing
B. Increases velocity range
C. Increases signal-to-noise ratio
D. Removes low-frequency signals
Question # 2
Which adjustment is needed to optimize the waveform below?
A. Lower baseline
B. Decrease gain
C. Increase wall filter
D. Increase pulse repetition frequency
Question # 3
What does changing the displayed depth control directly affect?
A. Pulse repetition frequency
B. Transducer transmit frequency
C. Pulse duration
D. Spatial pulse length
Question # 4
Which image demonstrates appropriate spectral Doppler gain?
A. Option A
B. Option B
C. Option C
D. Option D
Question # 5
Which transducer was most likely used to create this image?
A. Curvilinear
B. Endocavity
C. Phased array
D. Linear array
Question # 6
What determines the resonant frequency of a pulsed wave transducer?
A. Element thickness and pulse repetition frequency
B. Element diameter and speed of sound in element
C. Element diameter and element thickness
D. Element thickness and speed of sound in element
Question # 7
What improves the temporal resolution of color flow imaging?
A. Decreasing pulse repetition frequency
B. Increasing ensemble length (packet size)
C. Decreasing width of the color field of view
D. Increasing number of color lines per frame
Question # 8
How can the spectral Doppler mirroring seen in this image be eliminated?
A. Decrease wall filter.
B. Decrease Doppler gain.
C. Increase dynamic range.
D. Increase pulse repetition frequency (PRF).
Question # 9
Which factor has a positive effect on temporal resolution?
A. Increase in scan depth
B. Use of spatial compounding
C. Increase in number of focal zones
D. Use of narrow sector width
Question # 10
What does damping in a pulsed-wave transducer affect?
A. Pulse duration
B. Pulse repetition frequency
C. Beam focus
D. Beam penetration
Question # 11
What reduces speckle and increases visualization of specular reflectors and attenuated structures?
A. Elastography
B. Extended field of view
C. Pixel interpolation
D. Spatial compounding
Question # 12
Which system control adjusts amplification of signals as a function of depth?
A. Output power
B. Time gain compensation
C. Transmit focus
D. Reject
Question # 13
Which adjustment will reduce the artifact in the cystic lesion in image A resulting in image B?
A. Turn off harmonics
B. Increase dynamic range
C. Turn on edge enhancement
Question # 14
Which artifact displays reflectors more shallow than their actual position?
A. Section thickness
B. Range ambiguity
C. Mirror image
D. Ring-down
Question # 15
According to Poiseuille's law, a change in which parameter would have the greatest influence on blood flow?
A. Pressure gradient
B. Length of vessel
C. Viscosity of the fluid
D. Vessel radius
Question # 16
Which change was made after acquiring image A to produce image B?
A. Increased sweep speed
B. Decreased pulse repetition frequency
C. Decreased wall filter
D. Increased spectral gain
Question # 17
Which type of structure is best visualized with low persistence?
A. Anechoic
B. Static
C. Echogenic
D. Dynamic
Question # 18
What are two types of cavitation in tissue?
A. Heat and transient
B. Thermal and mechanical
C. Stable and transient
D. Thermal and stable
Question # 19
What is the term for an ultrasound system's ability to display low-level echoes?
A. Slice thickness
B. Axial resolution
C. Sensitivity
D. Lateral resolution
Question # 20
Which action may reduce the number of lines in a frame without a loss of temporal resolution?
A. Reducing the frame rate
B. Narrowing the field of view
C. Decreasing the display depth
D. Decreasing the transducer frequency
Question # 21
What is a potential negative consequence of using a high wall filter?
A. Desired signal may be eliminated
B. Aliasing could occur
C. Penetration is reduced
D. Too much noise may appear on the image
Question # 22
What occurs when the pulse repetition frequency is less than twice the Doppler shift frequency?
A. Spectral broadening
B. Range ambiguity
C. Aliasing
D. Propagation speed artifact
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