Fiducial Registration from a Single X-Ray Image: A New Technique for Fluoroscopic Guidance and Radiotherapy

Fiducial registration is useful both in applications where other registration techniques have poor performance and for validation of new registration techniques. Registration of 3D CT or MR images to 2D X-ray images is particularly difficult, in part because automated contour extraction from 2D images is not yet well solved and in part because of the considerable computational expense in matching the contours to the 3D images.

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