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Bone saw calibration method and system in surgical navigation

A calibration method and surgical navigation technology, which is applied in the bone saw calibration method and system field in surgical navigation, can solve the problems of slow convergence speed and low precision, and achieve the effects of fast convergence speed, high calibration precision, and suppression of impulse noise

Pending Publication Date: 2021-08-27
宽瑞智能科技(苏州)有限公司
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Problems solved by technology

[0004] For this reason, the embodiment of the present invention provides a bone saw calibration method and system in surgical navigation, to solve the existing LMS algorithm to solve the three-dimensional coordinates P of the bone saw in the bone saw coordinate system NTip There are problems of low accuracy and slow convergence speed

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  • Bone saw calibration method and system in surgical navigation
  • Bone saw calibration method and system in surgical navigation
  • Bone saw calibration method and system in surgical navigation

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Embodiment Construction

[0053] The implementation mode of the present invention is illustrated by specific specific examples below, and those who are familiar with this technology can easily understand other advantages and effects of the present invention from the contents disclosed in this description. Obviously, the described embodiments are a part of the present invention. , but not all examples. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts fall within the protection scope of the present invention.

[0054] Embodiment 1 of the present invention proposes a bone saw calibration method in surgical navigation, such as figure 1 As shown, the method includes the following steps:

[0055] Step S100, fix the coordinates of the blade tip point of the bone saw at a certain point in space, and then make the bone saw rotate around the blade tip point.

[0056] Step S200, collecting N frames of calibr...

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Abstract

The embodiment of the invention discloses a bone saw calibration method and system in surgical navigation, and the method comprises the steps: fixing the coordinates of a saw blade tip point of a bone saw at a certain point in space, enabling the bone saw to rotate around the saw blade tip point, collecting N frames of surgical instrument calibration images in the process of rotating the bone saw, according to the collected N frames of surgical instrument calibration images, calculating a three-dimensional coordinate PNTip of the saw blade tip point under the bone saw coordinate system by adopting a conjugate gradient algorithm based on a maximum correlation entropy criterion. The conjugate gradient algorithm and the correlation entropy are combined, the conjugate gradient algorithm has the advantage of being high in convergence speed, the correlation entropy can restrain impulse noise, and therefore the calibration method has the advantages of being high in convergence speed and high in calibration precision.

Description

technical field [0001] Embodiments of the present invention relate to the technical field of surgical navigation, in particular to a method and system for calibrating bone saws in surgical navigation. Background technique [0002] The calibration of bone saw in orthopedic surgery is one of the important tasks before surgical navigation. In order to accurately track the bone saw, especially the position of the tip point of the saw blade, the calibration accuracy of the bone saw is particularly important. The essence of bone saw calibration is to determine the three-dimensional coordinates of the bone saw in the bone saw coordinate system. The coordinates of the instrument can be determined by the non-collinear mark points set on the bone saw. [0003] In recent years, many scholars and researchers have studied the three-dimensional coordinate P of the bone saw in the bone saw coordinate system. NTip The solution of uses the LMS algorithm. However, in practice, the recognit...

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Application Information

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IPC IPC(8): G06T7/70A61B34/20A61B34/10
CPCG06T7/70A61B34/20A61B34/10G06T2207/10021A61B2034/2065
Inventor 芦颖僖张岳吴琼高强
Owner 宽瑞智能科技(苏州)有限公司
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