METHOD FOR OPTICAL MEDICAL NAVIGATION SYSTEM APPLICATION FOR VISUALIZATION AND QUANTITATIVE EVALUATION OF QUALITY OF FRAGMENTS REPOSITION IN CASE OF PELVIC BONE FRACTURE Russian patent published in 2017 - IPC A61B17/56 

FIELD: medicine.

SUBSTANCE: third positioner with passive markers is installed on the movable part of the pelvic bone. On the X-ray computer tomograph, images of the fixed part of the pelvic bone with a reference positioner with passive markers installed thereon and a movable part of the pelvic bone with the third positioner with passive markers installed thereon are recorded. At the workstation of the X-ray computer tomograph, image processing is performed and a 3D segmented image of the fixed part of the pelvic bone with a reference positioner with passive markers installed thereon and of the movable part of the pelvic bone with the third positioner with passive markers installed thereon, as well as of the fracture region is plotted. The processing results are transferred to the optical medical navigation system computer via the computer network and displayed on the screen to the surgeon for planning and subsequent management of surgical instruments during operation. On the display screen, the surgeon indicates the points of compliance in the fracture region on the 3D segmented image of the fixed part of the pelvic bone and the moving part of the pelvic bone, which, when combining the movable part of the pelvic bone and the fixed part of the pelvic bone during surgery, should be maximally approximated. During the operation using the optical medical navigation system, the reference positioner with passive markers and the third positioner with passive markers installed on the patient and visible by the stereo video cameras of the optical medical navigation system are geometrically linked to the segmented 3D images of the reference positioner with passive markers and the third positioner with passive markers and corresponding segmented fixed portion of the pelvic bone and the movable part of the pelvic bone. During surgery, the moving part of the pelvic bone and the fixed part of the pelvic bone are brought together by "manual" actions and set in the position for subsequent fixation with a screw. On the display, a 3D segmented image of the fixed part of the pelvic bone and the movable part of the pelvic bone is displayed in real time with the information on the distances between the correspondence points in the fracture region that must be maximally approximated to ensure the alignment of the fixed part of the pelvic bone and the movable part of the pelvic bone. The second positioner with passive markers is installed on the drill. To direct the needle through the desired areas in the fixed part of the pelvic bone and the movable part of the pelvic bone, the direction of needle drilling is determined by a schematic image of the passive markers of the first positioner with the passive markers located on the guiding needle and the depth of needle drilling according to the schematic drawing of the passive markers of the second positioner with the passive markers with respect to the 3D image of the fixed part of the pelvic bone and the movable part of the pelvic bone displayed of the optical medical navigation system screen. Further the needle is drilled into the fixed part of the pelvic bone and the movable part of the pelvic bone. The guiding needle is removed. A screw fixing the movable part of the pelvic bone to the fixed part of the pelvic bone is installed along the needle. The needle is removed and the wound is sutured.

EFFECT: reduced radiation load on the patient, increased functionality of the method.

2 cl, 3 dwg