While imaging a cyst you notice shadowing posterio...

While imaging a cyst you notice shadowing posterior to each lateral border of the cyst. What is the source of the shadows?

A: Redirection of the sound beam at an interface with different propagation speeds and a curved surface.

B: Bending of the sound beam due to different media propagation speeds.

C: Increased attenuation of the sound beam at the borders of the cyst.

D: Lateral misregistration of the cyst due to a multipath artifact.

E: Diffraction of the sound beam resulting in a weakened signal at the lateral borders of the cyst.

✔ Correct Answer:

B: Bending of the sound beam due to different media propagation speeds.

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