Knee joint replacement space registration system based on multi-modal fusion and point cloud registration

Abstract

The invention belongs to the technical field of medical equipment, and particularly relates to a knee arthroplasty space registration system based on multi-modal fusion and point cloud registration. The system comprises three modules: a space coordinate construction module of knee joint cartilage surface point cloud on a CT image; an intraoperative patient space knee joint cartilage surface point cloud acquisition module; and a knee joint cartilage surface point cloud layering registration module which achieves spatial registration of an intraoperative patient and a preoperative image, wherein the registration error is about 2.5 mm. According to the invention, the registration time in the operation can be greatly reduced, generally about 2 minutes are used, so that the operation time is greatly reduced; soft tissue information can be provided by utilizing the CT and MR images fused before the operation, so that a doctor can perform better pre-operation planning and intraoperative incision position judgment according to the soft tissue information; in addition, the degree of dependence on doctors can be greatly reduced, and the doctors can concentrate on the operation.

Description

technical field [0001] The invention belongs to the technical field of medical equipment, and in particular relates to a space registration system for knee joint replacement. Background technique [0002] Existing knee replacement systems often perform navigation based on intraoperative registration of marker points, which involves the selection and confirmation of multiple marker points, and takes a long time for registration, resulting in prolongation of operation time. [0003] Image-guided computer-assisted knee replacement surgery can help doctors perform surgery better [1]. Among them, spatial registration technology is one of the most important key technologies of surgical navigation, and it is also one of the main factors restricting clinical end-to-end accuracy, and it also affects the time of surgical navigation [2]. [0004] At present, the spatial registration technology in knee orthopedic navigation is mainly divided into three categories [1]: registration base...

AI Technical Summary

Problems solved by technology

[0021] In order to solve the problem of too long space registration time in computer-navigated knee replacement surgery, this invention proposes a knee replacement space registration system based on multi-modal information fusion and point cloud registration, which can maintain a high registration Accuracy, can also significantly reduce the time spent on registration

Images