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Which machine setting could cause aliasing to occur?
Correct Answer: B
Doppler Scale Too High: This would prevent aliasing but could result in loss of low-velocity signals. Doppler Scale Too Low: When the scale is set too low, velocities exceed the Nyquist limit, resulting in aliasing where the Doppler signal wraps around the baseline. Doppler Gain Too High: High gain may result in noise and overamplified signals but does not directly cause aliasing. Doppler Gain Too Low: Low gain results in weak signal detection but does not cause aliasing. Reference: "Diagnostic Ultrasound: Principles and Instruments" by Frederick W. Kremkau ARDMS Sonography Principles and Instrumentation study materials