SPI Exam Dumps | Which color Doppler setting can be optimized to eliminate low-frequency Doppler shifts without having

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ARDMS.SPI.v2025-12-29.q99
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Question 1/99

Which color Doppler setting can be optimized to eliminate low-frequency Doppler shifts without having any effect on higher Doppler frequency shifts?

A. Gain

B. Scale

C. Wall filter

D. Persistence

Correct Answer: C

The wall filter is used in color Doppler and spectral Doppler imaging to eliminate low-frequency Doppler shifts caused by tissue motion or vessel wall movement. Adjusting the wall filter removes these low- frequency signals without affecting higher-frequency Doppler shifts that represent blood flow. Other settings like gain, scale, and persistence do not selectively filter out low-frequency shifts in the same manner.
References:
American Registry for Diagnostic Medical Sonography (ARDMS) Sonography Principles and Instrumentation guidelines.

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