Image registrations with automatic spinal alignment measurement

A method of planning a surgery to correct a deformed spine of a patient comprising:

• receiving, from an x-ray imaging device, a first 2D image of the deformed spine of the patient at a first angle and a second 2D image of the deformed spine of the patient at a second angle transverse to the first angle, wherein the first and second 2D images are images of the patient in weight-bearing positions;
• automatically detecting, by a computer, a plurality of landmarks in both the received first 2D image and the received second 2D image;
• registering the received first and second 2D images together based on the detected landmarks in the first and second received 2D images;
• automatically determining spine alignment parameters from the detected landmarks;
• simultaneously displaying on a display for use in correcting a spinal deformity of the patient:
• a quantitative listing of the spinal alignment parameters, and
• the first and second 2D images along with a representation of at least some of the spinal alignment parameters on the displayed first and second 2D images.