TERMIUM Plus®

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BACK POINTER [2 records]

Record 1 2008-11-06

English

Subject field(s)
  • Radiological Physics (Theory and Application)
DEF

A device that very accurately indicates the exit point of the central ray in a radiation field.

OBS

This device is normally used only in radiation therapy and can be of an optical (commonly laser) or a mechanical type.

French

Domaine(s)
  • Physique radiologique et applications
CONT

En raison de la faible activité spécifique du radium, l'appareil était placé presque au contact du patient. Un rétro-pointeur facilitait l'orientation précise du faisceau. Le temps d'irridation était long (souvent une heure) et des moyens de contention assez simples étaient utilisés à l'époque.

Spanish

Save record 1

Record 2 1987-09-18

English

Subject field(s)
  • Artificial Intelligence
CONT

Each node maintains a back pointer which can be used to reconstruct the plan after it is fully formulated.

French

Domaine(s)
  • Intelligence artificielle

Spanish

Save record 2

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