Médecine

 
Veuillez utiliser les onglets pour afficher le type de produit (Expériences, Sets, Article ou Littérature / Logiciels).
 

Page 3 à 4

  <<  Précédente    1  2  3  4    Page suivante  >>

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

Absorption de la lumière

Principle

The structures of molecules are not changed by their chemical environment in the gas phase. In contrast to this, on transition to the condensed phase, in dilute solution, the solvent changes the binding state of the dissolved substance. One of the way this influence makes itself ...

 
Détails

Numéro d´article: P3070101

Neurobiologie : Le neurone avec Cobra4 Xpert-Link

Tasks
  • Use the nerve function model to study the following aspects of a nerve cell: membrane potential, action potential, the different types of synapses.
 
Détails

Numéro d´article: P4010764

Neurobiologie : Interactions de neurones avec Cobra4 Xpert-Link

Principle

Interactive learning and teaching system with two neurosimulators for experiments covering nerve cells and nerve cell interactions.

Benefits

  • Experience processes in the nerve cell and between nerve cells "hands-on"
  • Make all properties of a nerve cell easy to ...
 
Détails

Numéro d´article: P4010864

Neurobiologie: Réseau de neurones avec Cobra4 Xpert-Link

Principle

Interactive learning and teaching system with four neurosimulators for experiments covering nerve cells, nerve cell interactions and neural networks.

Benefits

  • Experience processes in the nerve cell, between nerve cells and in neural networks "hands-on"
  • Make all ...
 
Détails

Numéro d´article: P4010964

Changement du flux sanguin par le tabagisme

Principle

Cigarette consumption influences the diameter and therefore the circulation of the peripheral blood vessels. This experiment studies the change of the finger temperature during smoking.

Benefits

  • Simple and effective method to create hard data which shows the effect of ...
 
Détails

Numéro d´article: P4020460

Fréquence de fusionnement et seuil acoustique

Principle

The hearing range depends greatly on age. While tones above the upper acoustic threshold are not perceived at all, individual sounds under the lower hearing threshold are perceived as a continuous deep tone (merging).

Benefits

  • Exciting experiment for all age groups
  • Simple ...
 
Détails

Numéro d´article: P4040101

Détermination du champ de vision de l'homme

Principle

The part of the surroundings perceived with an unmoved eye is called the visual field. In contrast, the field of view is that part of the surroundings perceived by the eyes when allowed to move freely but without moving the head. Depending on the uneven distribution of rods and cones ...

 
Détails

Numéro d´article: P4070200

Capacité de résolution temporelle de l'?il humain

Avantages
  • La fonction périmétrique est semi-diagnostique, donc particulièrement adaptée à l'entraînement en phase préclinique.

 
Détails

Numéro d´article: P4070300

Test sur la capacité de réaction humaine

Principle

As in many technical processes, in the course of many biological functions the output values act back on the input values. With the many disturbing influences that affect biological systems, a feed-back reaction (control loop) of this type enables an equilibrium to be established ...

 
Détails

Numéro d´article: P4070400

Page 3 à 4

  <<  Précédente    1  2  3  4    Page suivante  >>

X-ray expert unit

This product is a world first

PHYWE présente la nouvelle unité de rayons x: une technologie novatrice, haut de la page sécurité, un confort maximum !

Plus d'informations