Patent Document ID: 6049582
Application ID: 09001308
Patent Status: 1

Claim One:
1. A C-arm calibration method for 3D reconstruction in an imaging system comprising an imaging source and an imaging plane, said method utilizing a planar transformation for relating voxels in a voxel space and pixels in said imaging plane, and comprising the steps of: defining a source coordinate system in reference to said imaging source; defining a normal plane in said voxel space, not including the origin of said source coordinate system and being substantially normal to an optical axis from said source to said imaging plane; defining a relationship between said source coordinate system and another coordinate system, herein referred to as a world coordinate system, by transformation parameters; identifying pixel location coordinates for a respective pixel corresponding to each voxel in said normal plane by utilizing a planar to planar transformation; storing a value of a filtered image at said respective pixel location; and accumulating contributions corresponding to a plurality of image projections so as to thereby reconstruct said each voxel.