Device for locating nuclear radiation and radiation image formation device incorporating such a locating device
AssigneeCommissariat a l'Energie Atomique
InventorsEdmond Tournier, Michel Tararine
Life of this patent
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Abstract
Device for locating nuclear radiation and radiation image formation device incorporating such a locating device. The locating device comprises a detection head having a crystal for converting a nuclear radiation into photons and a plurality of transducers for converting the photons into electric signals. These signals are received in a position coder, which has in series a weighting circuit for supplying analog signals X.sup.+, X.sup.-, Y.sup.- (and optionally Z), a digitizing device for digitizing the analog signals and a digital computer for producing digital signals X.sub.N, Y.sub.N defining the position of a nuclear radiation exciting the crystal.
Claims8
Device for locating a nuclear radiation incorporating a detection head for detecting a nuclear radiation and a position coder for locating said nuclear radiation, said detection head comprising a collimator, a planar layer of a material sensitive to said nuclear radiation for receiving on a first or front face a nuclear radiation transversing said collimator and for supplying on a second or rear face a light radiation which is a function of the nuclear radiation received, a plurality of transducers arranged on the rear face of said layer, each supplying an electric signal which is a function of the light radiation received, each nuclear radiation producing a light radiation seen by a plurality of transducers said locating device being characterized in that the position coder comprises weighting means for supplying analog electrical signals X.sup.+, X.sup.-, Y.sup.+, Y.sup.-, each representing weighted sums of the electric signals supplied by the transducers, the signlas X.sup.+, X.sup.- being a function of the position and the energy of the nuclear radiation received in accordance with an axis X and the signals Y.sup.+, Y.sup.- being a function of the position of the nuclear radiation received in accordance with an axis Y, a digitizing means for receiving the analog signals X.sup.+, X.sup.-, Y.sup.+, Y.sup.- and for supplying corresponding digital signals X.sub.N.sup.+, X.sub.N.sup.-, Y.sub.N.sup.+ and Y.sub.N.sup.- and a calculating means or computer for determining the signals of digital coordinates X.sub.N, Y.sub.N of the nuclear radiation received as a function of the digital signals X.sub.N.sup.+, X.sub.N.sup.-, Y.sub.N.sup.+ and Y.sub.N.sup.-.
Dependencies are inferred from the claim text.