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ARDMS Exam SPI Topic 3 Question 18 Discussion

Actual exam question for ARDMS's Sonography Principles and Instrumentation exam
Question #: 18
Topic #: 3
[All Sonography Principles and Instrumentation Questions]

What is the most effective way to reduce aliasing on color Doppler?

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Suggested Answer: A

Aliasing in color Doppler occurs when the velocity of blood flow exceeds the Nyquist limit, which is half the PRF. To reduce aliasing, the PRF must be increased. This raises the Nyquist limit, allowing higher velocities to be measured without wrapping around the baseline. Increasing PRF reduces the occurrence of aliasing artifacts by expanding the range of detectable velocities before aliasing occurs.


ARDMS Sonography Principles & Instrumentation Guidelines

Kremkau FW. Sonography Principles and Instruments. 9th ed. Philadelphia, PA: Elsevier; 2016.

by Johnetta at Sep 17, 2024, 05:48 PM

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Dyan
4 hours ago
I disagree, I believe the answer is C) Increase wall filter.
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Denise
1 days ago
Decrease the wall filter, huh? Sounds like a surefire way to make your color Doppler look like a disco ball. I'll pass on that one!
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Ressie
6 days ago
Increasing the wall filter? Psh, that's just going to mess everything up. Who came up with that idea, a color-blind Doppler enthusiast?
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Carin
12 days ago
I'm with Lili on this one. Lowering the PRF could be the secret sauce to minimize aliasing. Gotta think outside the box sometimes.
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Lili
15 days ago
Hold up, are you sure? Decreasing the PRF might be a better option here. Gotta try different approaches, you know?
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Gertude
17 days ago
I think the answer is A) Increase pulse repetition frequency (PRF).
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Lyda
22 days ago
Increasing the pulse repetition frequency (PRF) is the way to go! That's gonna reduce those pesky aliasing effects.
upvoted 0 times
Helaine
1 days ago
Yes, increasing PRF is the most effective way to reduce aliasing on color Doppler.
upvoted 0 times
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Emerson
12 days ago
Increasing the pulse repetition frequency (PRF) is the way to go! That's gonna reduce those pesky aliasing effects.
upvoted 0 times
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