SPI Exam Dumps | Which function is the purpose of the matching layer?

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Question 82

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Question 82/99

Which function is the purpose of the matching layer?

A. Convert acoustic to electrical energy

B. Allow sequential firing of elements

C. Reduce ringing of the crystals

D. Increase sound transmission

Correct Answer: D

Comprehensive and Detailed Explanation From Exact Extract:
The matching layer is placed between the transducer's piezoelectric element and the patient's skin. Its primary function is to improve the transmission of sound energy into the body by reducing the acoustic impedance mismatch between the crystal and tissue, minimizing reflection at the transducer surface.
According to sonography instrumentation reference:
"The matching layer improves transmission of ultrasound energy by reducing impedance mismatch between the transducer and soft tissue, thus increasing the efficiency of sound energy transfer." Therefore, the correct answer is D: Increase sound transmission.
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