SPI Exam Dumps | How can spectral Doppler cross talk be reduced?

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Question 6/99

How can spectral Doppler cross talk be reduced?

A. By decreasing the Doppler gain

B. By increasing the Doppler pulse repetition frequency (PRF)

C. By adjusting the Doppler baseline

D. By decreasing the Doppler wall filter

Correct Answer: A

Comprehensive and Detailed Explanation From Exact Extract:
Cross talk (spectral mirror artifact) appears as a duplication of the spectral waveform above and below the baseline. One primary cause is excessive Doppler gain, which amplifies weak signals and noise symmetrically. Reducing gain minimizes this artifact.
Principles and Instrumentation state:
"Cross talk in spectral Doppler may result from high gain settings. Lowering the gain can reduce or eliminate this artifact."
* PRF adjustments affect aliasing, not cross talk.
* Baseline shifts affect waveform positioning.
* Wall filter affects low-frequency signals but not cross talk.
Therefore, the correct answer is A: By decreasing the Doppler gain.

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