What is the propagation speed of fat?

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Multiple Choice

What is the propagation speed of fat?

Explanation:
Propagation speed in tissue is determined by how stiff the tissue is and how dense it is—stiffer materials transmit waves faster, while more compressible, less dense ones transmit slower. Fat is relatively soft and less dense than most soft tissues, so its compressibility is higher and the speed of a longitudinal wave is about 1,450–1,500 m/s. The value near 1,460 m/s is the best match for fat. By comparison, bone is much stiffer and yields speeds around 4,000 m/s, while many soft tissues run roughly 1,540 m/s.

Propagation speed in tissue is determined by how stiff the tissue is and how dense it is—stiffer materials transmit waves faster, while more compressible, less dense ones transmit slower. Fat is relatively soft and less dense than most soft tissues, so its compressibility is higher and the speed of a longitudinal wave is about 1,450–1,500 m/s. The value near 1,460 m/s is the best match for fat. By comparison, bone is much stiffer and yields speeds around 4,000 m/s, while many soft tissues run roughly 1,540 m/s.

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