Computerized tomography (CT) three-dimensional reconstruction image-based coronal process parameter measurement method and device

Abstract

The invention provides a CT three-dimensional reconstruction image-based coronary process parameter measurement method and device, and the method comprises the steps: obtaining CT data, reconstructing the CT data, and extracting a proximal ulna three-dimensional model; reference points are determined, wherein the reference points comprise a standard lateral position first ulna back point A, a standard lateral position second ulna back point B, a coronal process cuspidal point, an olecranon cuspidal point, a pulley concave lowest point C, a coronal process far-end slope change point D, a coronal process front inner side face farthest point E, a first coronal process width point F, a second coronal process width point G and a coronal process-near-end ulna backbone extension point H; measuring parameters are determined according to the reference points; the measurement parameters comprise the ulna coronal process height, the ulna coronal process width, the ulna height, the ulna coronal process front inner side face width, the ulna coronal process front inner side face maximum width, the ulna shaft-pulley shaft included angle, the ulna coronal process offset, the front inner side face width not supported by the near-end ulna diaphysis, the pulley opening longitudinal diameter and the olecranon-coronal process angle; and measuring the coronal process parameters by using the measurement parameters.

Description

technical field [0001] The invention relates to the field of computer technology, in particular to a method and device for measuring coronoid process parameters based on CT three-dimensional reconstruction images. Background technique [0002] Coronoid fractures of the ulna are complex elbow fractures. Coronoid fractures are characterized by two major features: combined injury and elbow instability. According to reports, the coronoid fracture combined with radial head fracture rate is as high as 53%, and the combined collateral ligament injury rate is as high as 41%. %The coronoid process is the "minimum necessary joint" to maintain the stability of the elbow joint; this makes the coronoid process fracture an important injury type that restricts the functional recovery after military training injuries and sports injuries. Significant. However, the current research on the morphology of the coronoid process is still not deep enough: some studies have pointed out that for di...

AI Technical Summary

Problems solved by technology

This study systematically constructed and measured the morphological parameters of the coronoid process, but there are also shortcomings: (1) The study is a study of cadaver bones, and the ulna bone surface is often irregular, and there will be errors when selecting reference points for different bones; ( 2) Clinically, compared with the analysis based on image data, the reference significance of cadaver bone research has certain limitations; (3) When determining the distance parameter, the research uses programming language to determine the shortest distance, although this method has high accuracy, but cannot be easily introduced into clinical applications

However, after further analysis of the study, we found that the study also has shortcomings: (1) How to define the image section to be taken when the reference point is defined on the two-dimensional plane? The study did not elaborate; (2) there is an anteversion angle at the proximal end of the ulna, and the study selected the anterior cortical edge of the distal coronoid as the reference point, which may be affected by this anatomical variation, and the reference point varies greatly, which will increase Measurement error

We can see that this study cannot avoid the shortcomings of the above-mentioned measurements: (1) How to use a standardized method to select the reference point, so as to lay the technical foundation for clinical repeatable measurement? (2) In order to meet the measurement requirements of the research, the image processing software involved is complex and various, and it is difficult to achieve rapid measurement of bone parameters in clinical practice

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