Apparatus and method for cone beam volume computed...

A - Human Necessities – 61 – B

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A61B 6/00 (2006.01) A61B 6/03 (2006.01) A61B 6/06 (2006.01)

Patent

CA 2390910

Volume tomographic mammography is performed with a gantry frame (206) in which a cone-beam radiation source (210) and a thin-film detector (208) are mounted. The patient (P) rests on an ergonomically designed table (202) with a hole (204) to allow one breast (B) to extend therethrough such that the gantry frame (206) surrounds that breast. The gantry frame is rotatable so that the radiation source (210) and the detector (208) move in a circular orbit around the breast (B). In addition, the gantry frame (206) is movable to describe a geometry other than a simple circle orbit, such as a circle plus one or more lines or a spiral.

Selon l'invention, on réalise une mammographie tomographique tridimensionnelle au moyen d'un portique (206) dans lequel sont montés une source (210) de rayonnement à faisceau conique et un détecteur (208) à film mince. La patiente (P) est allongée sur une table (202) de conception ergonomique dans laquelle est pratiqué un trou (204) destiné à permettre le passage d'un sein (B), de manière que le portique (206) entoure le sein. Le portique peut tourner de façon que la source (210) de rayonnement et le détecteur (208) se déplacent sur une orbite circulaire autour du sein (B). En outre, le portique (206) peut se déplacer de manière à décrire une géométrie autre qu'une simple orbite circulaire, notamment un cercle plus une ou plusieurs lignes ou une spirale.

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