A Skeleton Fragment Assembling Method Based on Feature Matching

Abstract

The invention discloses a bone fragment splicing method based on feature matching, which provides preoperative guidance for mandibular fracture repair by registering a three-dimensional bone fragment model reconstructed from a medical image. The method includes the following steps: 1) import the 3D bone fragment model, and manually extract the fracture surface of the fragment model; 2) extract the key points on the fracture surface of the bone fragment model based on the 3D-SIFT algorithm; 3) use the point feature histogram FPFH algorithm Construct feature descriptors for the extracted key points; 4) Establish the initial correspondence between two bone fragment models (referred to as the registration model and the target model) based on the extracted key points and corresponding descriptors; 5) Use the improved The ICP algorithm optimizes the initial corresponding relationship to obtain the final transformation matrix; 6) Apply the transformation matrix obtained in the previous step to the model to be registered to obtain the splicing result of the two bone fragment models. The process flow of the method is shown in Figure 1.

Description

technical field [0001] The invention relates to the technical field of computer graphics and computer-aided surgical digital design, and mainly relates to a method for splicing bone fragments based on feature matching Background technique [0002] In the early 1990s, scholars at home and abroad began to apply computer technology such as computer graphics and imaging, virtual reality technology, etc. An important development direction in the medical field. The craniomaxillofacial region contains many important blood vessels and nerve tissues, and the facial appearance is also considered. All these reasons put forward higher requirements for the accuracy of the craniofacial region surgery. The traditional surgical method mainly relies on the personal surgical experience of the doctor, resulting in a longer operation time and greater trauma to the patient. Therefore, computer-aided surgical planning for craniofacial parts has always been a hot research field in digital surger...

AI Technical Summary

Problems solved by technology

The traditional surgical method mainly relies on the doctor's personal surgical experience, resulting in a longer operation time and greater trauma to the patient

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