The invention relates to a computer-assisted
navigation system for a minimally
invasive surgery on the
aseptic necrosis of the
femoral head, which comprises an image
workstation, an optical location tracker and rigid positioning tools, wherein the image
workstation is equipped with special
software packages, connected with the optical location tracker, and provided with a video input interface and a
video output interface; the video input interface can be connected with an image
input device so as to parallelly display video images and navigation images, and the
video output interface can be connected with a monitor so as to output, display and
record the
surgery process during a
surgery; and the optical location tracker is connected with the image
workstation, and used for tracking the concrete positions of registration probes, surgical tools and affected parts by
infrared rays reflected by the rigid positioning tools which are fixed in the registration probes, the surgical tools and the affected parts in real time. The
system can effectively complete the minimally
invasive surgery on the
aseptic necrosis of the
femoral head, and under the condition of not affecting the
surgery effect, accurately resects focuses and minimizes the damages on normal tissues.