Apparatus and method for calibrating an x-ray image of a knee of a patient

摘要

An x-ray calibration apparatus includes a radiolucent knee alignment jig configured to receive a knee of a patient and a radiolucent cushion configured to hold a patient's knee at a fixed angle of flexion. The x- ray calibration apparatus also includes a number of radio-opaque fiducial markers positioned within the radiolucent knee alignment jig.