SPI Exam Dumps | What is assessed with power Doppler?

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Question 55/99

What is assessed with power Doppler?

A. Laminar flow

B. Presence of flow

C. Velocity of flow

D. Viscosity

Correct Answer: B

Comprehensive and Detailed Explanation From Exact Extract:
Power Doppler detects the strength (amplitude) of returning Doppler signals, which reflects the presence of flow regardless of direction or velocity. It is more sensitive to low-velocity flow and is less angle-dependent than conventional color Doppler.
Principles and Instrumentation state:
"Power Doppler displays the amplitude of Doppler shifts, representing the presence of flow. It does not display direction or velocity."
* Laminar flow (A) and velocity (C) are not specifically measured by power Doppler.
* Viscosity (D) cannot be assessed by Doppler ultrasound.
Therefore, the correct answer is B: Presence of flow.
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