ARDMS Practice Test 2026 – Complete Exam Prep Guide

If a sonographer must interrogate a blood vessel that displays slow flow once color Doppler is applied, what should be done to the pulse repetition frequency (PRF) to improve the visualization of flow?

Adjusting the PRF has no effect.

When dealing with slow flow in a blood vessel, adjusting the Pulse Repetition Frequency (PRF) might not always improve visualization. This is because PRF primarily affects the depth of penetration and the maximum velocity that can be measured accurately rather than the visualization of slow flow within a vessel. Slow flow may be better visualized by optimizing other settings such as wall filters or gain levels rather than solely adjusting the PRF. Therefore, in this scenario, adjusting the PRF may not have a significant impact on improving the visualization of slow flow in the blood vessel.

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Decrease the PRF.

Increase the PRF.

Adjusting the PRF will create aliasing.