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Skull 3D model construction method

A construction method and three-dimensional model technology, which is applied in the field of construction of a three-dimensional model of a human skull, and can solve problems such as the inability to obtain a three-dimensional model of the skull.

Inactive Publication Date: 2008-07-09
NORTHWESTERN POLYTECHNICAL UNIV
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  • Abstract
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Problems solved by technology

[0004] In order to overcome the deficiency that the existing technology cannot obtain a complete three-dimensional model of the skull, the present invention provides a method for constructing a three-dimensional skull model, which uses three orthogonal X-ray images, and carries out the orthogonal X-ray images through four points on the ear-orbital plane. Calibration: Scale the skull standard template according to two sets of ear-orbital plane points to obtain the initial skull model, and then use the deformation algorithm based on the radial basis function to construct the skull model according to the initial model feature points and actual feature points, and a complete skull model can be obtained. 3D skull model

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Embodiment Construction

[0015] With reference to the accompanying drawings, this embodiment is aimed at a 22-year-old male young man with straight-faced soft tissue, bilateral symmetry, no abnormal facial shape and no orthodontics, orthognathic and trauma history to perform three-dimensional construction of cranial hard tissues. Specific steps are as follows:

[0016] The first step is to use a laser 3D scanner and a high-quality scanning method to perform a 3D scan of a standard skull, and scan three 3D images of the front and left sides of the skull at 45°. During the scanning process, keep the skull level and straight, so that Ensure that the obtained skull images are straight. The three image data are read into the computer, and the images are processed and synthesized into a complete three-dimensional skull data model by running the scanner's own software.

[0017] Calibrate the obtained three-dimensional data model of the skull. Pick up four points of the ear-orbital plane on the 3D skull dat...

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Abstract

The invention discloses a construction method of a skull 3D model with the following steps of: collecting three mutually orthogonal X-ray head locator card images from the normotopia, the left lateral and the parietal chin bottom of a participant, using the four points of the orbital plane of ears and eyes on the X-ray images, demarcating the X-ray head locator card images; obtaining an original 3D data model of the participant's skull and 3D coordinates of the original feature point via zooming the skull standard template according to the two groups of the orbital plane points of ears and eyes; establishing the participant's skull model via deformation algorithm based on radial basis function according to the original feature point and the participant's actual characteristic point, and obtaining the whole skull 3D model.

Description

technical field [0001] The invention relates to a method for constructing a three-dimensional model of a skull, in particular to a method for constructing a three-dimensional model of a human skull. Background technique [0002] The construction of a three-dimensional model of the human skull is an important research method in stomatology. [0003] The document "Three-dimensional Determination of Craniomaxillary Feature Points in X-ray Films, Journal of Computer-Aided Design and Graphics, 2006, Vol.18 (1), p89-93" discloses a method for determining craniomaxillary feature points using X-ray films. Methods. Based on the principle of stereo cephalometric measurement, this method aims at the characteristic points of the cranium and jaw, and adds two oblique positioning films on the basis of the anteroposterior and lateral positioning films of the skull. Four X-ray cephalometric films at 45°, 90° and 135°. The two images with the best feature point development were selected e...

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Application Information

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IPC IPC(8): G06T17/00
Inventor 张艳宁施建宇周洪翟培芳孙瑾秋郗润平
Owner NORTHWESTERN POLYTECHNICAL UNIV
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