Attenuation in soft tissue is closest to:

Attenuation in soft tissue is closest to:

• A. 3 dB/1MHz
• B. 1 dB/cm/10MHz
• C. 0.6 dB/cm/MHz
• D. 2 dB/cm

Answer: (C)

Attenuation in soft tissue increases with frequency and is described as an attenuation coefficient in dB per centimeter per MHz. For soft tissue, a typical value is about 0.5–0.7 dB/cm/MHz, meaning every centimeter of tissue at 1 MHz would attenuate roughly 0.5–0.7 dB, and higher frequencies produce proportionally more attenuation. The figure closest to this standard range is 0.6 dB/cm/MHz, so it best fits what soft tissue does in practice. Other options either miss the per-MHz scaling or give numbers that don’t align with how soft-tissue attenuation behaves across clinical frequencies.

Attenuation in soft tissue increases with frequency and is described as an attenuation coefficient in dB per centimeter per MHz. For soft tissue, a typical value is about 0.5–0.7 dB/cm/MHz, meaning every centimeter of tissue at 1 MHz would attenuate roughly 0.5–0.7 dB, and higher frequencies produce proportionally more attenuation. The figure closest to this standard range is 0.6 dB/cm/MHz, so it best fits what soft tissue does in practice. Other options either miss the per-MHz scaling or give numbers that don’t align with how soft-tissue attenuation behaves across clinical frequencies.