Knee joint replacement space registration system based on multi-modal fusion and point cloud registration
A technology for knee replacement surgery and point cloud registration, which is applied in the field of knee replacement surgery space registration system, can solve the problems of long space registration time and reduce registration time, so as to achieve good preoperative planning, reduce operation time, The effect of reducing the degree of dependence
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[0052] The present invention is further described below in conjunction with embodiment and accompanying drawing.
[0053] Taking the femur as an example, the application process of the registration system of the present invention is as follows Figure 4 shown.
[0054] Module I is the process of enhancing the CT image before operation and obtaining the spatial coordinates of the point cloud of the preoperative cartilage surface. Segment hard bone and cartilage from preoperative CT and MR images respectively, and obtain the registration transformation matrix T of CT and MR at the same time mr→ct . The transformation matrix obtained by registration is applied to the soft and hard bone labels obtained by segmentation, and the fusion structure of soft and hard bone labels can be obtained. After three-dimensional reconstruction, a model with cartilage is obtained, which will be used for intraoperative navigation, and cartilage can be extracted from it Surface point cloud P imag...
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