Loading patent…
AssigneeStellenbosch University
InventorsCornelius Scheffer, Jean-Pierre Conradie, Amir David Zarrabi, Kristiaan Schreve
Estimating the term…
A method of positioning a surgical instrument is provided which includes mapping a volume adjacent an operating table by taking mapping images from two orientations of a calibration object which includes a 3-dimensional array of radio opaque markers in a known configuration. A patient is positioned on the operating table with a patient target area within a mapped volume, and an instrument holder carrying a known configuration of radio opaque markers positioned adjacent the target area. Further fluoroscopic target images of the target area and instrument holder are obtained from the two orientations and the target area then reconstructed in 3-dimensions by comparing the target images to the mapping images. An instrument holder orientation is then calculated from the reconstruction.
A method of positioning an instrument comprising:
A system for positioning an instrument comprising a processor configured to map a volume adjacent an operating table from a pair of fluoroscopic images of a calibration object taken from a pair of different orientations, and wherein the processor reconstructs a patient target area in three dimensions by comparing the images of the calibration object to a pair of images of the patient target area taken from the same orientations, and wherein the processor calculates an instrument orientation from the reconstruction based on at least one user selected target point.
A system as claimed in claim S wherein the calibration object includes a 3-dimenisonal array of radio opaque markers in known configuration.
Dependencies are inferred from the claim text.