X-Radiographie et Dosimétrie

 
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Dosimétrie de rayons X

 
Détails

Numéro d´article: P2541805

Expérience avec un produit de contraste sur un modèle de vaisseau sanguin sanguin

Principle

When a blood vessel model is irradiated with X-rays, the blood vessels themselves are not visible at first. It is only after the injection of a contrast medium that the blood vessels become visible.

Tasks

  1. Inject a 50% potassium iodide solution into the blood ...
 
Détails

Numéro d´article: P2541901

Détermination de la longueur et de la position d'un objet invisible à l'?il nu

Principle

This experiment provides training in determining the length and position of an object based on an X-ray image. A metal pin that is embedded in a wooden block is used as the model. This experiment is also an excellent preparatory exercise for demonstrating the principle of computed ...

 
Détails

Numéro d´article: P2542001

Tomodensitométrie



Principe de l'expérience

Le principe de la tomodensitométrie est démontré à l'aide des objets simples. Dans le cas des cibles simples, seulement quelques images sont nécessaires pour obtenir un bon résultat. Au plus les objets sont ...

 
Détails

Numéro d´article: P2550100

Principes de base du traitement digital en radiographie (rayons-X)

Principle

With digital X-ray imaging, X-ray photons that interact with the detector are converted to a digital signal. This permits to record digital radiographies. With this experiment, the principles of digital detectors for X-ray imaging are laid out.

Tasks

  1. Define a good exposure ...
 
Détails

Numéro d´article: P2550101

Principes de base de l'attenuation et du contraste en radiographie digital (rayons-X)

 
Détails

Numéro d´article: P2550200

Principes de base de l'intensité de rayonnement en radiographie digitale (rayons-X)

 
Détails

Numéro d´article: P2550300

Principes de base de la résolution et de sasie de détails en radiographie digitale (rayons-X)

Principle

In X-ray imaging, resolution is an important factor. It determines the sharpness of the images and the de-tails of a sample that can be observed. In this experiment, the different factors that determine the resolu-tion are investigated.

Tasks

  1. Investigate the resolution in ...
 
Détails

Numéro d´article: P2550400

Principes de base de la tomodensitométrie (rayons-X)

Principle

X-ray computed tomography consists of using X-rays that are converted to a digital signal by a detector and computational algorithms to calculate virtual sections through an object without the need to physical-ly cut them. With this data it is possible to generate 3D ...

 
Détails

Numéro d´article: P2550500

Alignement de la caméra en radiographie digitale (rayons-X)

Principle

Alignment of the detector and the rotation stage is very important to get optimal quality images of a CT scan. In this experiment, the different possible misalignments and their correction are studied and de-scribed.

Tasks

  1. Optimise the COR and correction
  2. Optimise the ...
 
Détails

Numéro d´article: P2550600

Optimisation de la qualité en tomodensitométrie (rayons-X)

Principle

The quality of the image will improve with a number of parameters. In this experiment the different fac-tors influencing the quality of the CT Scan are investigated. One of the most important parameters is the number of projections. This is due to a longer scan time which results ...

 
Détails

Numéro d´article: P2550700

Artefacts métalliques et durcissement du faisceau

Principle

X-ray sources produce a polychromatic spectrum which is altered when interacting with the sample. Due to this alteration, cupping effects in the reconstructed data of a CT scan. In extreme cases, such as when metal objects are present in the sample, more severe artefacts occur at ...

 
Détails

Numéro d´article: P2550800

L'échelle des unités de Hounsfield (UH)

Principle

Depending on the type of CT scanner and the settings, the result of a CT scan of the same material can be different attenuation coefficient (grey-values). In order to make it easier to compare CT data, espe-cially in medicine, the grey-values of a CT scan are often rescaled to a ...

 
Détails

Numéro d´article: P2550900

X-ray expert unit

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