What is the purpose of the gel coupling between th...

What is the purpose of the gel coupling between the transducer and the skin?

A: To reduce heating of the epidermis caused by sound absorption and friction.

B: To soften the skin and soothe the patient.

C: To provide a medium for sound transmission since ultrasound does not propagate through air.

D: To reduce the impedance differences between the transducer and the skin.

E: To lessen refraction of the sound at the skin surface and improve sound transmission.

✔ Correct Answer:

C: To provide a medium for sound transmission since ultrasound does not propagate through air.

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