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Abstract
Topographical measuring systems were developed several years ago to quantify the external deformations of a scoliotic trunk. École Polytechnique has expertise in the area of 3D X-ray reconstruction of the spine and rib cage. The University of Calgary has a special collaboration with Clynch Technologies Inc., an orthotics company in Calgary allowing them to use their laser scan system. As part of a collaborative project between these two institutions, which aims to study the correlation between the internal and external geometries, an integrated acquisition system has been developed.
The objective of this project is to evaluate the accuracy of the 3D reconstruction technique of the internal and external geometries, to identify the possible sources of error and to suggest solutions in order to improve the results of the system and the 3D reconstruction, as used in Calgary. Several stages are necessary to obtain either the laser or X-ray reconstructions. Each of these stages is evaluated separately in order to determine the error introduced at each stage. The reconstruction techniques are first evaluated separately and then, the superimposition of the two reconstructions is evaluated. (Abstract shortened by UMI.)
