Quiz 2026 ARDMS Marvelous SPI Related Exams
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ARDMS SPI Exam Syllabus Topics:
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Details
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Topic 5
ARDMS Sonography Principles and Instrumentation Sample Questions (Q123-Q128):
NEW QUESTION # 123
Which adjustment will improve visualization of blood flow if color extends outside the boundary of the vessel walls?
Answer: A
Explanation:
Comprehensive and Detailed Explanation From Exact Extract:
When color "bleeds" outside vessel walls, it often results from motion artifacts or noise from slow tissue motion being displayed as flow. Increasing the wall filter eliminates low-frequency Doppler shifts caused by motion, improving color accuracy within vessel boundaries.
According to sonography instrumentation reference:
"Raising the wall filter eliminates low-velocity signals from vessel wall motion, reducing the appearance of color outside the vessel lumen." Therefore, the correct answer is C: Increasing wall filter.
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NEW QUESTION # 124
What is the relationship between overall gain and image brightness?
Answer: A
Explanation:
Overall gain in ultrasound refers to the amplification of all the received echo signals. Increasing the overall gain amplifies the signals, making the entire image brighter. Conversely, decreasing the overall gain reduces the signal amplification, resulting in a darker image. Overall gain adjustment affects the entire image uniformly, unlike time gain compensation (TGC), which adjusts the gain at different depths independently.
Reference:
ARDMS Sonography Principles and Instrumentation (SPI) Exam Study Guide
"Diagnostic Ultrasound: Principles and Instruments" by Frederick W. Kremkau
NEW QUESTION # 125
Which region of this image from a sector phantom is evaluating the dead zone?
A close-up of a ultrasound Description automatically generated
Answer: D
Explanation:
Comprehensive and Detailed Explanation From Exact Extract:
The dead zone in ultrasound refers to the shallow area immediately beneath the transducer where no useful data can be collected due to the transducer's ring-down and the time required for the system to switch from transmit to receive mode.
In a sector phantom image, the area closest to the transducer (superficial portion) is used to evaluate the dead zone. In this image, Region A is located at the top of the image, closest to the transducer surface.
According to sonography instrumentation reference:
"The dead zone is assessed by evaluating the area immediately beneath the transducer. This area is used to test the system's near-field performance and transducer surface integrity." Therefore, the correct answer is A: Region A.
NEW QUESTION # 126
What is an advantage of power Doppler over color Doppler?
Answer: A
Explanation:
Power Doppler, unlike color Doppler, is less angle dependent because it detects the strength of the Doppler signal rather than the velocity of the blood flow. This means it is more sensitive to detecting low-velocity flow and flow in smaller vessels, regardless of the angle between the ultrasound beam and the flow direction.
Color Doppler provides information on flow direction and velocity but is highly dependent on the angle of insonation, making it less reliable when the angle is suboptimal.
ARDMS Sonography Principles and Instrumentation guidelines
Zwiebel, W. J., & Pellerito, J. S. (2017).Introduction to Vascular Ultrasonography. Elsevier.
NEW QUESTION # 127
What occurs when the pulse repetition frequency is less than twice the Doppler shift frequency?
Answer: D
Explanation:
Comprehensive and Detailed Explanation From Exact Extract:
Aliasing happens in Doppler ultrasound when the Doppler shift frequency exceeds half of the pulse repetition frequency (the Nyquist limit). When PRF is too low for the measured Doppler shift, the signal wraps around, producing aliasing.
According to sonography instrumentation reference:
"Aliasing occurs when the Doppler shift frequency exceeds one-half the pulse repetition frequency (Nyquist limit). This results in incorrect display of flow direction and velocity." Therefore, the correct answer is C: Aliasing.
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NEW QUESTION # 128
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