ARDMS (American Registry for Diagnostic Medical Sonography) Practice Test 2025 - Free ARDMS Practice Questions and Study Guide

Question: 1 / 400

Assume that a sound beam is traveling in soft tissue. Calculate the attenuation coefficient if the frequency is 12 MHz.

12 dB/cm

6 dB/cm

Attenuation coefficient is an important factor in understanding how sound waves weaken as they travel through a medium. In soft tissue, with a frequency of 12 MHz, the typical attenuation coefficient is around 0.5 dB/cm/MHz. Therefore, with a frequency of 12 MHz, the attenuation coefficient would be calculated as 0.5 dB/cm/MHz * 12 MHz = 6 dB/cm. This is why the correct answer is B.

The other options are incorrect because they do not correspond to the correct attenuation coefficient for soft tissue at a frequency of 12 MHz.

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8 dB/cm

10 dB/cm

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