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ARDMS SPI Exam - Topic 3 Question 22 Discussion

What adjustment is needed to optimize the color in the image below?
D) Increase pulse repetition frequency
A) Decrease gain
B) Increase wall filter
C) Decrease persistence

ARDMS SPI Exam - Topic 3 Question 22 Discussion

Actual exam question for ARDMS's SPI exam
Question #: 22
Topic #: 3
[All SPI Questions]

What adjustment is needed to optimize the color in the image below?

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Suggested Answer: D

Increasing the pulse repetition frequency (PRF) helps to optimize the color Doppler imaging by reducing aliasing.

Aliasing occurs when the PRF is too low to accurately sample the rapid blood flow velocities, leading to incorrect color representation.

By increasing the PRF, the system can more accurately measure higher velocities without distortion, improving the overall quality of the color Doppler image. Reference:

ARDMS Sonography Principles and Instrumentation guidelines on Doppler imaging and techniques to reduce aliasing.


by Kattie at Mar 02, 2026, 11:32 PM

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Willis
But what about increasing the wall filter?
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Emogene
5 days ago
I think we should decrease gain.
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Dierdre
10 days ago
Wait, can increasing pulse repetition frequency really change color?
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Cheryl
15 days ago
Decreasing persistence? Not sure about that one.
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Loreta
2 months ago
Increasing the wall filter might be better though.
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Coral
2 months ago
Totally agree, that usually helps with color balance!
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Laurel
2 months ago
I think we should decrease gain.
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Erick
3 months ago
Increasing pulse repetition frequency could also improve the overall quality.
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Alline
3 months ago
Wait, are we really considering decreasing persistence? Seems risky.
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Marjory
3 months ago
Not so sure about that, increasing wall filter might be better.
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Brittni
3 months ago
Totally agree, that usually helps with color balance!
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Gertude
3 months ago
I think we should decrease gain.
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William
3 months ago
I wonder if increasing pulse repetition frequency could help with the color, but it seems a bit off for this scenario.
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Edison
4 months ago
This question feels similar to one we practiced on color optimization, but I can't remember the exact adjustment we discussed.
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Taryn
4 months ago
I remember something about wall filters affecting color, but I can't recall if increasing it would help in this case.
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Brinda
4 months ago
I think we might need to decrease gain to improve the brightness, but I'm not entirely sure.
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