Calibrating imaging devices

G - Physics – 01 – N

Patent

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Details

G01N 29/22 (2006.01) A61B 8/00 (2006.01) G01N 29/06 (2006.01) G01N 37/00 (2006.01)

Patent

CA 2574675

Methods and apparatus for calibrating images and imaging devices to common coordinate systems utilize, in some embodiments, rods that detectably reflect an acoustic signal regardless of the incidence angle of the signal with respect to the rods. Typically, the rods are disposed within a "phantom" at known positions with respect to a room coordinate system. Images of the cylindrical rods may be obtained from different directions, allowing the imaging device to be calibrated to the room coordinate system.

L'invention concerne des procédés et un appareil de calibrage d'images et de dispositifs d'imagerie sur des systèmes de coordonnées communs. Dans certains modes de réalisation, ces procédés et appareil mettent en oeuvre des tiges réfléchissant un signal acoustique de manière détectable, quel que soit l'angle d'incidence du signal par rapport aux tiges. Généralement, les tiges sont placées à l'intérieur d'un <= fantôme >=, au niveau d'emplacements connus, par rapport à un système de coordonnées de la pièce. Des images des tiges cylindriques peuvent être obtenues à partir de différentes directions, ce qui permet de calibrer le dispositif d'imagerie sur le système de coordonnées de la pièce.

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