A method for automatically registering bent bone fracture and pre-bending modeling of an internal fixation steel plate

Abstract

The invention discloses a method for automatically registering bent bone fracture and pre-bending modeling of an internal fixation steel plate, which comprises the following steps: S1, extracting maindirection of broken bone model point set by PCA algorithm and selecting clustering seed point along main direction; S2, extracting main direction of broken bone model point set by PCA algorithm; S2,respectively constructing capsule mapping models at both ends of the broken bone model; S3, clustering the feature points of the mapping model constructed in S2 by using OPTICS algorithm; 4, extracting and segmenting the point set of the cross-section part of the broken bone model; S5, precisely registering the broken bone model according to the two section point sets obtained by the segmentation;S6: selecting the control point at the fracture position of the fracture model, and thickening the triangular patch within the range of the control point to obtain the steel plate model. The method utilizes many algorithms such as curve fitting, clustering, feature point mapping and so on, realizes the automatic splicing of bending bones efficiently and accurately, realizes the automatic registration of bending bones model and prebending of steel plate, and does not need manual operation.

Description

technical field [0001] The invention relates to the technical field of section segmentation and registration of curved bones, in particular to a method for automatic registration of curved bone fractures and pre-bending modeling of internal fixation steel plates. Background technique [0002] At present, the combination of artificial reduction and internal fixation of the injured limb is generally used in fracture surgery. The problems of this method are large trauma, heavy bleeding, and easy to cause complications such as neurovascular injury. Therefore, we can use computer algorithms to virtually splice the broken bone model, so as to obtain various geometric parameters of the steel plate before operation. However, the current virtual stitching method for broken bones can only be applied to long straight bones, and there is no effective automatic registration method in the field of section segmentation and registration of curved bones. And in the rib registration method b...

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Problems solved by technology

[0002] At present, the combination of artificial reduction and internal fixation of the injured limb is generally used in fracture surgery. The problems of this method are large trauma, heavy bleeding, and easy to cause complications such as neurovascular injury.

However, the current virtual stitching method for broken bones can only be applied to long straight bones, and there is no effective automatic registration method in the field of section segmentation and registration of curved bones.

And in the rib registration method based on ridge line pre-registration, it is necessary to manually pick the seed points to segment the section point set, and there is no automatic section point set segmentation and curved bone registration

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