Method and system for determining the energy and position...

Details Method and system for determining the energy and position... Method and system for determining the energy and position...

G - Physics

01

T

G01T 1/164 (2006.01) G01T 1/202 (2006.01) G01T 1/208 (2006.01)

Patent

CA 2442932

A radiation detector, in particular a gamma camera, is constructed and operated in such a fashion that only a predetermined number of light sensors (such as PMT's) adjoining each other in a cluster are used to generate a signal with amplitude and event position information. The camera may also use an array of individual scintillation elements (crystals) in place of a single crystal, with certain advantages obtained thereby. According to another aspect of the invention, there is a reflector sheet that defines an array of apertures through which scintillation light can pass from the scintillation crystal to a plurality of light sensors optically coupled to an optical window in an array corresponding to the array of apertures in the reflector.

L'invention concerne un détecteur de rayonnement, particulièrement une caméra gamma, fabriqué et exploité de manière à n'utiliser qu'un nombre prédéterminé de photocapteurs (tels que des tubes photomultiplicateurs (PMT)) reliés les uns aux autres sous forme de grappes pour émettre un signal contenant des informations d'amplitude et de position d'événement. De plus, cette caméra peut avantageusement utiliser un réseau d'éléments de scintillation individuels (cristaux) au lieu d'un monocristal. Selon un autre aspect de l'invention, une feuille réfléchissante comporte un jeu d'ouvertures que traverse la lumière de scintillation provenant du cristal de scintillation pour se projeter sur une pluralité de photocapteurs optiquement couplés à une fenêtre optique dans un réseau correspondant à celui des ouvertures du réflecteur.

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