Abstract: Systems and methods are described for the use of external fixators with intraoperative tracking of bone and/or attached devices and display of real-time information to the surgeon, for example for the treatment of bone deformities. Such systems and/or methods may include determining the deformity to be corrected; estimating the appropriate number, shape, and size of base members, transosseous fixations, and connecting elements to be used; suggesting optimal positions of said items relative to the bone segments; and calculating the necessary correction based on the final position of the attached external fixator components relative to the bone segments.