Apparatus and method for measuring anatomical objects using...

Details Apparatus and method for measuring anatomical objects using... Apparatus and method for measuring anatomical objects using...

A - Human Necessities

61

B

A61B 6/02 (2006.01) A61B 6/12 (2006.01)

Patent

CA 2360572

Two fluoroscopic images taken from two different angles of the same anatomical feature are registered to a common three-dimensional coordinate system. A dimension of the anatomical feature is determined by specifying with reference to the two registered fluoroscopic images two constrained points within the three-dimensional coordinate system that correspond to the boundaries of the anatomical feature, and calculating a straight-line distance between the two. Additionally, a three-dimensional virtual model of an implant is projected into each of two, registered fluoroscopic image, and a surgeon manipulates the projections to adjust the size and shape of the virtual model, and thereby determine parameters for the implant.

Deux images radioscopiques de la même caractéristique anatomique prises de deux angles différents sont enregistrées dans un système de coordonnées tridimensionnel classique. On détermine la dimension de la caractéristique anatomique en spécifiant deux points restreints relatifs aux deux images radioscopiques enregistrées dans le système de coordonnées tridimensionnel, correspondant aux contours de la caractéristique anatomique, et on calcule ensuite la distance rectiligne qui les sépare. Par ailleurs, on représente un modèle virtuel tridimensionnel d'un implant dans chacune des images radioscopiques enregistrées, un chirurgien manipulant ces représentations pour régler la taille et la forme du modèle virtuel et déterminer ainsi les paramètres de l'implant.

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