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Radiology · Ultrasound
Sample itemWhat information does Doppler ultrasound primarily provide?
Original practice item, not a recalled exam question. Nothing here is recorded.
The answer and the reasoning
A. Direction and velocity of blood flow
Doppler ultrasound detects frequency shifts from moving blood cells and can display flow direction, velocity, and waveform characteristics, helping evaluate vessels, valves, and perfusion.
Option by option
A. Direction and velocity of blood flow (correct)
Correct: Doppler assesses moving blood and its flow characteristics.
B. Bone mineral density
Bone density is not measured with Doppler ultrasound.
C. Tissue glucose concentration
Tissue glucose requires biochemical or specialized sensor methods.
D. Electrical activity of muscle
Muscle electrical activity is assessed with electromyography.
Source note: Original NextPrep sample item — pending expert review. This item is original practice material awaiting independent expert review, so confirm important facts in a standard textbook.