TERMIUM Plus®

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signal de précession libre [1 record]

Record 1 2007-05-02

English

Subject field(s)
  • Magnetic Resonance Imaging
DEF

A signal induced by the RF [radio frequency] excitation of the nuclear spins, and that decreases exponentially without external influence at a characteristic time constant T2 [star].

French

Domaine(s)
  • Imagerie par résonance magnétique
CONT

Les protons, qui précessent en phase pendant la durée de l'impulsion de radiofréquence, précessent librement dès que celle-ci cesse. Ils se déphasent rapidement et le signal induit recueilli par l'antenne décroît, lui aussi rapidement : c'est le signal de précession libre [...]

Spanish

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