Single-tooth extraction method based on panorama

Abstract

A single-tooth extraction method based on a panorama is characterized by comprising the following steps: step 1, extracting an alveolar bone foreground image; step 2, generating a tooth panorama according to the alveolar bone foreground image obtained in the step 1; step 3, generating an upper and lower jaw separation line according to the tooth panorama obtained in the step 2; step 4, generatingadjacent tooth segmentation lines according to the tooth panorama obtained in the step 2; step 5, extracting a single tooth from the three-dimensional oral CT by using the upper and lower jaw separation line obtained in the step 3 and the adjacent tooth segmentation line obtained in the step 4; and step 6, carrying out post-processing on the generated three-dimensional single-tooth CT image stack.The method for extracting the single tooth based on the panorama is easy to implement and high in robustness, is not limited to a CT image of the oral cavity of a patient with the open oral cavity, and can extract any single tooth in the oral cavity of the patient. And the method realizes automatic segmentation of adjacent teeth, and manual interaction is reduced as much as possible.

Description

technical field [0001] The invention relates to the field of computer medical image processing. Background technique [0002] In oral medical diagnosis, computed tomography (CT) image is a commonly used medical imaging technology, which can obtain high-precision tomographic data of the oral cavity, and can reconstruct a three-dimensional anatomical structure consistent with the actual structure. However, in the actual operation process, the case diagnosed by the doctor is for a specific tooth, not all or some side-by-side teeth, so it is very important to extract the 3D single-tooth CT image stack from the original 3D oral CT image stack. value. [0003] Hui Gao published an article entitled Automatic Tooth Region Separation for Dental CT Images at the 2008 International Conference on Convergence & Hybrid Information Technology, and proposed a method for separating independent tooth regions in three-dimensional space. This method assumes that adjacent teeth can use a plane ...

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Problems solved by technology

[0004] In view of this, the purpose of the present invention is to overcome the problems of high distortion of the panorama generated by the prior art, the manual determination of the separation line of adjacent teeth in the panorama, and the failure of the automatic separation line of the upper and lower jaws in the patient's oral occlusal or relaxed state, and discloses a A new panorama-based single tooth extraction method

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