ARDMS (American Registry for Diagnostic Medical Sonography) Practice Test

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Prepare for the ARDMS Exam with our comprehensive quiz platform. Test your knowledge using flashcards and multiple-choice questions, complete with hints and detailed explanations. Get ready to ace your diagnostic medical sonography certification!

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Which statement is NOT true concerning color Doppler?

Doppler frequency shift is reached with the use of the autocorrelation method.
Aliasing may occur when using color Doppler.
Color Doppler is a reliable method to measure the peak systolic and end diastolic velocities.
Range resolution exists with color Doppler.

The correct answer is: Doppler frequency shift is reached with the use of the autocorrelation method.

Regarding the incorrect statement, Doppler frequency shift is not achieved through the autocorrelation method in color Doppler imaging. Doppler frequency shift is actually determined by the movement of blood cells in the vessel, which causes a change in the frequency of the sound waves emitted by the transducer. The autocorrelation method is utilized in Doppler imaging to calculate the mean velocity of blood flow. In contrast to option A, options B, C, and D are true statements regarding color Doppler imaging. Aliasing can indeed occur in color Doppler imaging, especially when the velocity of blood flow exceeds the Nyquist limit. Color Doppler is generally reliable for measuring peak systolic and end diastolic velocities, providing valuable information about blood flow characteristics. Additionally, range resolution is a feature of color Doppler, allowing for the differentiation of velocities along the beam path.