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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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Kimberlie
5 days 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
10 days 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
15 days 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
20 days 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
25 days 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
1 month 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
1 month 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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