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The change in direction of an ultrasound beam across a tissue interface is due principally to

Sagot :

Answer:

  • Ultrasound waves are only refracted at a different medium interface of different acoustic impedance. Refraction allows enhanced image quality by using acoustic lenses. Refraction can result in ultrasound double-image artifacts. During attenuation the ultrasound wave stays on the same path and is not deflected.

Explanation: