Principal vector analysis based broken bone section segmentation and broken bone model registration method

Abstract

The invention discloses a principal vector analysis based broken bone section segmentation and broken bone model registration method. The method comprises the following steps of S1: performing axis extraction of a broken bone model by adopting a principal vector analysis algorithm; S2: extracting a grid vertex set of a broken bone section according to normal vector mutation of a triangular patch on a broken bone three-dimensional grid model and an included angle between the triangular patch and the broken bone axis; S3: performing spatial rough registration on the broken bone three-dimensional grid model in combination with methods for alignment of the broken bone axis and alignment of a principal vector of the grid vertex set of the broken bone section; S4: performing multi-time iterative computation for grid vertex sets of two broken bone sections by utilizing an iterative closest point algorithm to realize spatial fine registration of the broken bone three-dimensional grid model; and S5: according to a complete skeleton model obtained by broken bone three-dimensional grid model registration, performing fitting of a fracture steel plate model. According to the method, the grid vertex set of the broken bone section can be accurately segmented, rough consistency of the sections is realized in rough registration, the precision of fine registration is improved, and the success rate of fine registration is increased.

Description

technical field [0001] The invention relates to a broken bone section segmentation and broken bone model registration method based on principal vector analysis. 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 the computer to carry out virtual splicing of the broken bone model, so that various geometric parameters of the steel plate can be obtained before the operation. This technology is expected to be combined with advanced manufacturing methods such as 3D printing in the future for personalized preoperative customization of fracture plates, which can greatly promote the minimally invasive process of fracture surgery. Contents of the invention [0003] According to the problems existing in the prior art, the presen...

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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.

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