Caput femoris rotation center calculation method and system

A technology of rotation center and calculation method, applied in the field of surgical navigation system

Pending Publication Date: 2022-07-29
宽瑞智能科技(苏州)有限公司
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

However, the current traditional artificial knee replacement surgery is very dependent on the experience of clinicians, and the failure rate due to prosthetic loosening, dislocation, fracture and infection noise is 5% to 8%.

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  • Caput femoris rotation center calculation method and system
  • Caput femoris rotation center calculation method and system
  • Caput femoris rotation center calculation method and system

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Embodiment Construction

[0021] The preferred embodiments of the present invention will be described below with reference to the accompanying drawings. It should be understood that the preferred embodiments described herein are only used to illustrate and explain the present invention, but not to limit the present invention.

[0022] The invention provides a method and system for calculating the center of the femoral head, which can accurately calculate the rotation center point of the femoral head, and is simple, convenient and robust.

[0023] The confirmation of the center of the femoral head is the basis for the confirmation of the femoral alignment, and it is also the premise of the prosthesis placement planning in the knee joint navigation system. The invention provides a method and system for calculating the center of the femoral head of a knee joint navigation system.

[0024] A tracking marker bracket is installed on the femur, and the operation of shaking the thigh is completed while the hip...

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Abstract

The invention provides a femoral head rotation center calculation method and system. The method comprises the following steps: recording spatial position data of a plurality of markers on the femoral head when the thigh is shaken; singular points of the spatial position data are deleted by using a random sampling consensus algorithm; fitting by adopting a Gaussian elimination method to obtain an initial sphere center coordinate of the spatial position data; calculating the average value of the sphere center coordinates of all markers; and establishing a spherical equation by taking the average value of the sphere centers as an initial value, taking a Cauchy kernel function as a robust kernel function and taking the information of all tracking markers after the singular points are deleted as the basis, and performing nonlinear iterative optimization to obtain the coordinates of the sphere centers. According to the femoral head rotation center calculation method and system provided by the invention, the femoral head rotation center point can be accurately calculated, and the method and system are simple, convenient and good in robustness.

Description

technical field [0001] The invention relates to the technical field of surgical navigation systems, in particular to a method and system for calculating the rotation center of a femoral head. Background technique [0002] Total Knee Replacement (TKR) is one of the most effective surgeries to solve serious knee joint damage that affects patients' mobility, and can effectively improve the quality of life of patients. However, the current traditional artificial knee replacement surgery is very dependent on the experience of clinicians, and the failure rate due to prosthesis loosening, dislocation, fracture and infection noise is 5% to 8%. Compared with the traditional artificial knee replacement surgery, the knee replacement surgery navigation system combines computer image processing with the precise planning of the robot, intelligently evaluates the force and motion analysis, and assists the clinician to complete the knee replacement surgery, which can reduce Surgical injury...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61B34/20A61B34/10
CPCA61B34/20A61B34/10A61B2034/107A61B2034/2046
Inventor 吴琼丛伟建王一闻张巍
Owner 宽瑞智能科技(苏州)有限公司
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