SPI Exam Dumps | What combination of transmitting frequency and depth produces the greatest ultrasound beam attenuation?

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ARDMS.SPI.v2025-12-29.q99
Question 90

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Question 90/99

What combination of transmitting frequency and depth produces the greatest ultrasound beam attenuation?

A. 5 MHz at 2 cm

B. 7.5 MHz at 2 cm

C. 5 MHz at 5 cm

D. 7.5 MHz at 5 cm

Correct Answer: D

Comprehensive and Detailed Explanation From Exact Extract:
Attenuation increases with both frequency and depth. The highest attenuation occurs at the highest frequency and greatest depth. 7.5 MHz attenuates faster than 5 MHz, and 5 cm represents deeper tissue penetration.
Principles and Instrumentation state:
"Attenuation is directly proportional to frequency and path length: Attenuation = Frequency × Depth × Attenuation Coefficient." Therefore, the correct answer is D: 7.5 MHz at 5 cm.
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