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Question 27/44
If the pulse repetition frequency is 3 kHz, what is the maximum Doppler shift that can be detected without aliasing?
Correct Answer: A
The maximum Doppler shift that can be detected without aliasing is determined by the Nyquist limit, which is half of the pulse repetition frequency (PRF). If the PRF is 3 kHz, the Nyquist limit is 32=1.523kHzz=1.5kHz. Therefore, the maximum Doppler shift that can be detected without aliasing is 1.5 kHz. Aliasing occurs when the Doppler shift exceeds this limit, causing an incorrect representation of the velocity.
Reference: ARDMS Sonography Principles and Instrumentation, Chapter on Doppler Principles.
Reference: ARDMS Sonography Principles and Instrumentation, Chapter on Doppler Principles.
- Question List (44q)
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