ARDMS (American Registry for Diagnostic Medical Sonography) Practice Test

Question: 1 / 400

Which component of the ultrasound wave increases if the sonographer increases the output gain?

Frequency

Intensity

Noise

Pulse duration

Ultrasound waves consist of cycles with a certain frequency and amplitude. The frequency is dependent on the sound source and cannot be changed, but the pulse duration is determined by the length of the electrical signal sent to the crystal. Therefore, increasing the output gain will increase the pulse duration, and not the frequency. Option A is incorrect because the frequency cannot be changed. Option B is incorrect because intensity is related to amplitude, not pulse duration. Option C is incorrect because noise does not have a direct correlation with output gain.

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