ARDMS Exam SPI Topic 3 Question 12 Discussion

Actual exam question for ARDMS's Sonography Principles and Instrumentation exam

Question #: 12
Topic #: 3

[All Sonography Principles and Instrumentation Questions]

Which of these modes has the highest duty factor?

AContinuous wave Doppler

BPulsed wave Doppler

CColor flow Doppler

DGray-scale

Show Suggested Answer

Suggested Answer: A

The duty factor is the fraction of time that the ultrasound system is actively transmitting a signal. Continuous wave (CW) Doppler has the highest duty factor because it continuously transmits and receives ultrasound waves. Unlike pulsed wave Doppler, which alternates between sending and receiving signals, CW Doppler does not have a listening period, resulting in a duty factor of nearly 100%. Therefore, CW Doppler has the highest duty factor among the modes listed.

ARDMS Sonography Principles & Instrumentation Guidelines

Hedrick WR, Hykes DL, Starchman DE. Ultrasound Physics and Instrumentation. 4th ed. Philadelphia, PA: Elsevier Saunders; 2005.

by Roy at Aug 22, 2024, 11:29 PM

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Teri

4 days ago

Definitely B) Pulsed wave Doppler. That's the one with the highest duty factor, right?

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Casie

7 days ago

I agree with Dean, Pulsed wave Doppler has a higher duty factor.

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Dean

10 days ago

I think the answer is B) Pulsed wave Doppler.

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