Which test verifies Doppler velocity accuracy?

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Multiple Choice

Which test verifies Doppler velocity accuracy?

Explanation:
Verifying Doppler velocity accuracy requires a known reference flow. A Doppler flow phantom provides a controlled fluid flow with a precisely set speed inside a tissue-mimicking medium, so the Doppler system’s velocity measurements can be directly compared to the true value. This direct reference makes it the appropriate test for confirming that Doppler-derived velocities are accurate. Visual inspection only checks physical appearance, not measurement accuracy; external cleaning is about maintenance, not measurement validation; and receiver calibration focuses on electronics performance rather than matching a known flow velocity.

Verifying Doppler velocity accuracy requires a known reference flow. A Doppler flow phantom provides a controlled fluid flow with a precisely set speed inside a tissue-mimicking medium, so the Doppler system’s velocity measurements can be directly compared to the true value. This direct reference makes it the appropriate test for confirming that Doppler-derived velocities are accurate. Visual inspection only checks physical appearance, not measurement accuracy; external cleaning is about maintenance, not measurement validation; and receiver calibration focuses on electronics performance rather than matching a known flow velocity.

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