Scintillation device using transmission tomography for...

G - Physics – 01 – T

Patent

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G01T 1/164 (2006.01)

Patent

CA 2064033

A gamma camera usable for measuring the attenuation factor of gamma radiation in a body being examined is made from a gamma camera customarily used to examine the effects of gamma radiation emitted by markers injected into the body. To this end, the collimator (18) of the gamma camera is removed and replaced by a ring (17) and an arm (13) to which is secured a box (12) designed to contain a point-like radioactive source (11) outside the body. It is shown that transmitted images may thus be obtained very quickly. These images may be used to correct normal emission images.

On réalise une gamma caméra utilisable pour mesurer le coefficient d'atténuation du rayonnement gamma dans un corps étudié à partir d'une gamma caméra, normalement réalisée pour étudier les effets des rayonnements gamma émis par des marqueurs injectés dans le corps. Dans ce but, on enlève le collimateur (18) de cette gamma caméra et on le remplace par une couronne (17) et par un bras (13) auquel est fixée une enceinte (12) destinée à contenir une source radioactive (11) ponctuelle extérieure au corps. On montre qu'on peut obtenir ainsi des images en transmission très rapidement. Ces images sont utiles à la correction des images d'émission normales.

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