Patent ID: 9129427
Filing Date: 2015-09-08
Classification: G01N,G06T

Abstract:
1. A method of generating a three-dimensional representation of a region of interest on a target object using a number of projections, comprising the steps of: identifying a single fiducial marker having one or more marker elements of predetermined known geometry in a region of interest of the target object or on a moveable surface which is fixed relative to the region of interest, the predetermined known geometry of the single fiducial marker defining an input parameter; creating a first image of the single fiducial marker and first image of the region of interest by detecting radiation from a radiation source with a detector when the region of interest and single fiducial marker are in a first position relative to the radiation source and the detector is in a first detector position relative to the radiation source; for each of a plurality of desired second positions of the region of interest and the single fiducial marker relative to the radiation source, and a corresponding desired second detector position relative to the radiation source for each of the plurality of desired second positions, with the plurality of desired second positions and desired second detector positions based on desired movement of the region of interest and the detector around the radiation source to capture the number of projections, each of the projections comprising second image data created by detecting radiation from the radiation source with the detector when the region of interest and single fiducial marker are in one of the desired second positions and the detector is in the corresponding desired second detector position, determining an expected second image of the single fiducial marker based on the input parameter of the predetermined known geometry of the single fiducial marker for the corresponding desired second position; performing capture of the number of projections and correction of the second image data for each of the desired second positions and desired second detector positions, by repeating the following series of steps for each of the desired second positions and desired second detector positions: generating a three-dimensional representation of the region of interest utilizing the number of projections of the region of interest, the number of projections being more than two, and which include the first image of the single fiducial marker and of the region of interest, and the corrected second image data for each of the desired second positions.