Patent ID: 6229873
Filing Date: 2001-05-08
Classification: A61B,G01N

Abstract:
A method for positioning an optical camera with respect to an X-ray source relative to an X-ray detector plane, comprising the steps of:positioning at least two off-plane markers above the X-ray detector plane between the source and the detector plane;acquiring an X-ray image of the off-plane markers;positioning a set of on-plane projection markers on the X-ray detector plane at the points at which the off-plane markers are projected by the X-ray source;acquiring an optical image of the off-plane markers and the on-plane projection markers; anddetermining whether the locations of the off-plane markers and the on-plane projection markers in the image coincide and, if not, adjusting the orientation of the optical camera and reacquiring the optical image until the optical images of the off-plane and on-plane projection markers coincide.