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Method for extracting panoramic image from three-dimensional conical beam CT data of dentistry department

A cone-beam and panorama technology, which is used in the generation of X-ray panoramas and the field of panorama extraction from 3D dental cone-beam CT data, can solve the problems of reducing image quality, affecting diagnostic accuracy, and image blurring, reducing Manual operation, avoid image blur, improve the effect of precision

Active Publication Date: 2016-05-25
CAPITAL NORMAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Because human teeth have a certain inclination angle, this method requires a certain thickness to display the full teeth on the panorama. However, the thickness projection will cause image blurring, reduce image quality, and affect the accuracy of diagnosis.
[0005] Through the search, no patent publications related to the patent application of the present invention have been found

Method used

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  • Method for extracting panoramic image from three-dimensional conical beam CT data of dentistry department
  • Method for extracting panoramic image from three-dimensional conical beam CT data of dentistry department
  • Method for extracting panoramic image from three-dimensional conical beam CT data of dentistry department

Examples

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Effect test

Embodiment 1

[0052] A method for extracting panoramas from three-dimensional dental cone-beam CT data, the steps of which are as follows:

[0053] ⑴ Generate dental arch curves based on 3D dental cone beam CT data;

[0054] (2) Extract the three-dimensional oral panoramic surface according to the generated dental arch curve;

[0055] (3) Expand the three-dimensional oral panorama surface to obtain the oral panorama.

[0056] Preferably, the specific steps of generating the dental arch curve according to the three-dimensional dental cone-beam CT data in the step (1) are: calculating the maximum density projection image of the three-dimensional CT data along the vertical direction, separating the dental arch in the maximum density projection image, and Fit the arch curve.

[0057] Preferably, the specific step of separating the dental arch in the maximum density projection image is: separating the dental arch in the maximum density projection image by combining a grayscale-based segmentati...

Embodiment 2

[0064] A method for extracting a panorama from three-dimensional dental cone-beam CT data can extract a three-dimensional oral panorama curved surface, and expand the three-dimensional curved surface to obtain an oral panorama.

[0065] The method flow is as follows figure 1 As shown, the specific steps are as follows:

[0066] 1. Generate the dental arch curve according to the three-dimensional dental cone beam CT data. The specific implementation method is as follows:

[0067] Calculate the MIP image of the 3D CT data along the vertical direction, such as Figure 2-2 shown;

[0068] Apply the k-means++ clustering method on the maximum density projection image to extract the brightest bone area after clustering; calculate the center of gravity point of the bone area, and its quadrilateral neighborhood, so that the quadrilateral neighborhood covers p=75% of the bone area, Get the coordinate range represented by the quadrilateral neighborhood; apply the coordinate threshold ...

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Abstract

The invention relates to a method for extracting panoramic image from three-dimensional conical beam CT data of a dentistry department, and the method comprises the following steps: (1), generating a dental arch curve according to the three-dimensional conical beam CT data of the dentistry department; (2), extracting a three-dimensional oral cavity panoramic curved surface according to the generated dental arch curve; (3), expanding the three-dimensional oral cavity panoramic curved surface and obtaining an oral cavity panoramic image. The method can extract a tooth curved surface faultage image through the three-dimensional CT data, solves problems of structure overlapping and image fuzzy, and improves the diagnosis precision. The method can obtain a single-frame oral cavity panoramic image, and the single-frame oral cavity panoramic image can display all teeth. The method can clearly recognize the anatomical structure of teeth, such as enamel, dentin and dental pulp, effectively avoids image fuzzy caused by perspective, and has no structure overlapping.

Description

technical field [0001] The invention belongs to the technical field of medical devices, and relates to a method for generating an X-ray panorama, in particular to a method for extracting a panorama from three-dimensional dental cone-beam CT data. Background technique [0002] The X-ray panorama is an X-ray two-dimensional projection image of all the teeth in the oral cavity, which can visually display the distribution of all the teeth and help doctors understand the overall picture of the teeth in the oral cavity. Panoramic X-rays are a simple and convenient imaging technique widely used by dentists. However, traditional X-ray panoramas have some disadvantages, such as geometric deformation, structure superposition, image blurring, etc. [0003] At present, dental cone beam CT has been widely used in the field of dental diagnosis and plastic surgery due to its advantages of high spatial resolution, low radiation dose and flexible post-processing software. However, accordin...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06T19/20G06T3/00
CPCG06T3/00G06T19/20G06T2200/04
Inventor 罗婷石昌荣赵星
Owner CAPITAL NORMAL UNIVERSITY
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