What term describes the information shown by color Doppler imaging about blood flow?

What term describes the information shown by color Doppler imaging about blood flow?

• A. Doppler frequency shifts
• B. Pressure shifts
• C. Temperature changes
• D. Acoustic impedance

Answer: (A)

Color Doppler imaging conveys information about blood flow through Doppler frequency shifts produced by moving blood cells. As blood moves toward or away from the transducer, the reflected ultrasound frequency shifts slightly; the system encodes these shifts as color on the image to indicate flow direction and relative speed. This Doppler frequency shift is the concept reflected in color Doppler findings. The other options don’t describe what color Doppler shows: pressure shifts aren’t what’s mapped, temperature changes aren’t involved, and acoustic impedance relates to tissue properties, not flow information.

Color Doppler imaging conveys information about blood flow through Doppler frequency shifts produced by moving blood cells. As blood moves toward or away from the transducer, the reflected ultrasound frequency shifts slightly; the system encodes these shifts as color on the image to indicate flow direction and relative speed. This Doppler frequency shift is the concept reflected in color Doppler findings. The other options don’t describe what color Doppler shows: pressure shifts aren’t what’s mapped, temperature changes aren’t involved, and acoustic impedance relates to tissue properties, not flow information.