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ARDMS SPI Exam - Topic 2 Question 21 Discussion

Actual exam question for ARDMS's SPI exam
Question #: 21
Topic #: 2
[All SPI Questions]

What method can be used to resolve aliasing artifact?

Show Suggested Answer Hide Answer
Suggested Answer: D

Comprehensive and Detailed Explanation From Exact Extract:

Continuous wave (CW) Doppler can measure very high velocities without aliasing because it does not have a Nyquist limit like pulsed-wave Doppler.

Principles and Instrumentation state:

'Aliasing is eliminated in continuous wave Doppler since it does not rely on sampling and has no upper velocity limit.'

Output power (A) affects signal strength, not aliasing.

Higher frequency (B) increases aliasing susceptibility.

Decreasing PRF (C) actually worsens aliasing.

Therefore, the correct answer is D: Using continuous wave Doppler ultrasound.

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by Willis at Jan 25, 2026, 05:14 PM

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Frederic
15 days ago
I think increasing the sampling rate helps.
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Lai
20 days ago
Isn't it surprising how often people overlook this?
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German
25 days ago
Really? I thought that just made it worse sometimes.
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Cathrine
1 month ago
I heard using a low-pass filter works too.
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Keshia
1 month ago
Totally agree, that's a classic fix!
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Val
1 month ago
Increasing the sampling rate can help.
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Kimberely
2 months ago
Supersampling, baby! That's the secret sauce.
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Leandro
2 months ago
Hmm, I think dithering might be the answer here.
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Zoila
2 months ago
Applying a low-pass filter should do the trick.
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Maurine
2 months ago
Upsampling the image, of course! That's the way to go.
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Deonna
2 months ago
I definitely practiced a similar question, and I think they talked about anti-aliasing techniques, but I can't remember the specifics.
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Erinn
2 months ago
I feel like there are multiple ways to address aliasing, but I can't recall all of them right now. Maybe it's about adjusting the Nyquist rate?
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Kimberlie
3 months ago
I remember practicing a question about aliasing in our last review session, and I think applying a low-pass filter was mentioned as a solution.
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Salena
3 months ago
I think using a higher sampling rate can help with aliasing, but I'm not entirely sure if that's the only method.
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Selma
4 months ago
Ah yes, aliasing artifacts! I remember discussing some good approaches to that in our graphics lectures. I think I'll start by outlining a few different anti-aliasing methods and then explain which one I think would work best.
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Maybelle
4 months ago
Aliasing? Oh man, that's a tough one. I know there are ways to reduce those jagged lines, but I'm drawing a blank on the specific methods. Guess I'll have to think it through carefully.
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Lili
4 months ago
Aliasing is all about reducing those jagged edges, right? I'm pretty sure there are some post-processing techniques that could help with that, but I'll have to think it through.
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Margurite
4 months ago
Hmm, not totally sure about this one. Aliasing artifacts can be tricky. Maybe I'll try to remember some methods we covered in class, like using a higher sampling rate.
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Shayne
4 months ago
I think I've seen this type of question before. Might try discussing different anti-aliasing techniques like supersampling or adaptive filtering.
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