What is the most important reason that there needs to be a coupling agent between the ultrasound transducer and the patient when administering ultrasound?
A) To make the administration of the ultrasound more comfortable for the patient
B) To reduce the reflection of the acoustical energy from the metal transducer into the air
C) To help the sound waves travel, because sound waves from the transducer cannot travel through the air
D) To increase the cost of the treatment for the patient
Correct Answer:
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