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SOMBRA ACUSTICA [1 record]

Filter results by subject field Alphabetical list of terms

Filter results by subject field

Alphabetical list of terms

Record 1 2019-07-08

English

Subject field(s)
  • Ultrasonography
CONT

If the sound encounters air or bone ... the impedance mismatch is so great that almost all of the acoustic energy is reflected and nearly none is transmitted. This creates an acoustic shadow that obscures structures located deep to the air or bone.

French

Domaine(s)
  • Ultrasonographie
CONT

[...] les cônes d'ombre apparaissent quand les ultrasons rencontrent une structure plus atténuante que les structures voisines; dans ce cas (os, calcifications, air), il n'y a plus d'échos émis en arrière de la structure, d'où la présence d'une zone anéchogène [...]

Spanish

Campo(s) temático(s)
  • Ecografía
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