System and method for image segmentation, bone model generation and modification, and surgical planning

A computer-implemented method for pre-operatively generating a computer model of a bone for an arthroplasty procedure, the bone including cancellous bone and cortical bone, the computer-implemented method comprising:

• receiving scan data including image slices of a portion of the bone, the image slices depicting cancellous matter, cortical matter and outer matter, the cancellous matter corresponding to the cancellous bone of the bone, the cortical matter corresponding to the cortical bone of the bone, the outer matter corresponding to matter outside of the cortical bone;
• identifying an inner boundary and an outer boundary in the image slices, the inner boundary defined between the cancellous matter and the cortical matter, the outer boundary defined between the cortical matter and the outer matter;
• segmenting the image slices along both the inner boundary and the outer boundary, an inner contour generated by segmenting along the inner boundary, an outer contour generated by segmenting along the outer boundary;
• and
• generating a virtual model of the bone from a plurality of the image slices, the virtual model including an inner surface and an outer surface, the inner surface corresponding to the inner contour and the outer surface corresponding to the outer contour.