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X-RAY SIGNAL [3 records]

Filter results by subject field Alphabetical list of terms

Filter results by subject field

Alphabetical list of terms

Record 1 2025-05-16

English

Subject field(s)
  • Radiography (Medicine)
CONT

Detective quantum efficiency(DQE) is one of the fundamental physical variables related to image quality in radiography and refers to the efficiency of a detector in converting incident x-ray energy into an image signal.

French

Domaine(s)
  • Radiographie (Médecine)
CONT

L'efficacité quantique de détection (EQD) fait référence à la qualité d'image, au contraste et aux niveaux de rayonnement nécessaires pour produire des images radiologiques.

Spanish

Save record 1

Record 2 2012-02-17

English

Subject field(s)
  • Tomography
CONT

An(x, y) coordinate system is used to describe points in the layer under examination.... The contribution of each point toward the detected signal is denoted by the density function f(x, y). The term ’density’ is used in a suggestive sense. For X-ray tomography, f(x, y) actually represents the linear attenuation coefficient... ;for radioisotope imaging, f(x, y) is proportional to radioisotope density.

French

Domaine(s)
  • Tomographie
DEF

Rapport d'atténuation d'un pixel d'une structure à l'atténuation d'un pixel d'eau.

Spanish

Campo(s) temático(s)
  • Tomografía
Save record 2

Record 3 1997-12-19

English

Subject field(s)
  • Chemistry
DEF

[In X-ray emission spectroscopy], ionization of the analyte element in a sample by characteristic radiation from other elements in the sample resulting in an enhancement of the signal measured.

French

Domaine(s)
  • Chimie
DEF

[En spectroscopie d'émission de rayons X], ionisation de l'élément à analyser dans un échantillon par le rayonnement caractéristique d'autres éléments présents dans l'échantillon; il en résulte un rehaussement du signal mesuré.

Spanish

Save record 3

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