摘要:
A method for transforming a bone image data set (16) representing at least a partial image of a long bone to a robotic coordinate system, comprising: generating the bone image data set (16) from a bone image; registering a bone digitizer arm (100) to the robotic coordinate system; generating a digitized bone data set (17) by taking bone surface position measurements with the digitizer arm (100); and transforming the bone image data set (16) into the robotic coordinate system by performing a best-fit calculation between coordinates of the bone image data set (16), and corresponding coordinates of the digitized bone data set (17).
摘要:
Methods, systems and apparatus for planning the position of a prosthesis in a long bone in orthopaedic surgical procedures, such as hip replacement surgery, knee replacement surgery, long bone osteotomies, and the like. A bone model is generated from a scanned image of a bone, a prosthesis model is selected from a library of prosthesis models and then a cavity model is formed based on the prosthesis model and/or the bone model. The cavity model may then be positioned over the bone model, either interactively by the surgeon or automatically through an algorithm based on clinical parameters, to determine a reasonable location for implantation of a prosthesis within the bone. The cavity model allows the surgeon to optimize placement of the implant within the bone, and it provides important clinical information to the surgeon, such as areas in which press fits are provided, extension areas for possible subsidence and access areas for allowing the surgeon to insert the implant into the cavity.
摘要:
A method for transforming the image of a long bone into a system coordinate space, such as robotic system coordinate space, comprises identifying in the image data set directional coordinates representing bone axis and at least one positional coordinate on the bone surface. Corresponding coordinates in the actual bone immobilized in the robotic or other system space are then determined by contacting a probe, such as a probe at the end of a manipulatable arm on a robot, to corresponding locations in the actual bone. The coordinates within the image data set are then registered with the actual coordinates within the immobilized bone to produce a transfer function that can be used to transform the image data set to the coordinate system space.