Universitè Laval

Michel Boulianne

Rock Santerre

Louis Cloutier

Paul Labissonniere

Pierre Marcotte

Dinh N Nguyen

Pierre-Michel Arseneault

Sanjib K Ghosh

An extendible surveying probe comprises two collinear position detecting units that allow the probe to be used in an inclined position for accessing vertically inaccessible points with a tip thereof. The two position detecting units may consist of two GPS or GLONASS units used in association with another GPS or GLONASS unit installed on a known point or, alternatively, of two corner cubes used in association with a ground total station. The position detecting units provide spatial coordinates of two spaced-apart collinear points which may be used to extrapolate the coordinates of the point in contact with the tip of the probe.

Surveying probe and method for computing the spatial coordinates of a

A simulator, for use with stereoradiographs, as a neurosurgical aid in locating potential paths for the implantation of probes in selected locations of the brain. It has a support, on the top surface of which is mounted a pair of radiographs disposed for stereoscopic viewing. An elongated ruler lies over the stereoradiographs and is movable in translation over them. A pair of transparent flat plotting plates are mounted on the ruler and are slidable therealong. Each plotting plate has a circular hole and a transparent circular disc is rotatable around this hole; a radial line extending from the center of the disc giving a 'floating line' in the stereoscopically viewed model to simulate a probe to be implanted in the brain.

Simulator for use as a neurosurgical aid in determining potential paths

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Michel Boulianne