Cone beam CT (computed tomography) area-of-interest scanning method based on visualization

A technology of region of interest and scanning method, which is applied in the field of secondary scanning of the region of interest of cone beam CT to achieve accurate results

Inactive Publication Date: 2015-02-18
SOUTHEAST UNIV
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Problems solved by technology

[0004] The purpose of the present invention is to propose a method based on visual cone beam scanning object inte

Method used

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  • Cone beam CT (computed tomography) area-of-interest scanning method based on visualization
  • Cone beam CT (computed tomography) area-of-interest scanning method based on visualization
  • Cone beam CT (computed tomography) area-of-interest scanning method based on visualization

Examples

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Embodiment 1

[0035] Example 1 Reconstruction of the mouse kidney region of interest

[0036] Such as Figure 4 and Figure 5 , first open the folder where the picture is located, and load all the data into the memory. Then obtain the region of interest according to the cone beam CT secondary scanning method of the present invention:

[0037] The first step: the overall initial scan to obtain the overall data of the whole mouse, and perform three-dimensional reconstruction through the visualization method.

[0038] Step 2: Enable the combined display function of the multi-plane reconstruction effect and the 3D reconstruction effect.

[0039] Step 3: Three-dimensional cropping to the preliminary area. Since the region of interest is in the kidney of the mouse, it is initially cropped to the corresponding position

[0040] Step 4: Move the multi-plane reconstruction plane data, determine the exact position and move the cropping frame to the specified position, and determine the precise ra...

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Abstract

The invention discloses a method for obtaining a high-resolution area-of-interest image through secondary scanning on the basis of visualization. The method comprises the following steps that the positions of a turntable and a radiation source are regulated, the distance is zoomed out, the wider visual field is shown, and an object is subjected to whole primary scanning; the three-dimensional visual reconstruction and the MPR (multiple planar reconstruction) are carried out according to a scanning result; reconstruction results are combined to be displayed, and the area-of-interest position is determined through interaction in the three-dimensional space; meanwhile, the positions of the turntable and the radiation source, the height of the turntable, the position of the object on the turntable and the resolution of imaging equipment are regulated, so that the center of interest is positioned in the center of the turntable, meanwhile, the visual field can just accommodate the area of interest, and the area-of-interest fine scanning is carried out after the regulation. The reconstruction is carried out according to the fine scanning result, and a high- resolution image of the area of interest is obtained. The method has the advantages that the positioning scanning of the area of interest can be realized, meanwhile, the resolution of the region scanning can be obviously improved, simplicity is realized, and the realization is easy.

Description

technical field [0001] The invention belongs to the field of cone-beam CT high-resolution imaging, and in particular relates to a visualization-based cone-beam CT interest region secondary scanning method. Background technique [0002] A conventional cone beam CT system is mainly composed of a ray source, a mechanical scanning mechanism, a radiation detector, a shielding device and an electronic computer subsystem. Cone beam CT can perform high-resolution X-ray imaging of bones, teeth, living small animals and various material devices without destroying the sample, and obtain detailed three-dimensional structural information inside the sample, thereby displaying three-dimensional images of each part. The use of cone beam can not only obtain a true isotropic volume image, improve spatial resolution, and improve the utilization rate of rays, but also acquire the same 3D image much faster than fan beam CT. [0003] The imaging resolution of cone beam CT is mainly affected by t...

Claims

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Application Information

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IPC IPC(8): A61B6/03G06T15/00
Inventor 罗守华管琛琛李光张奎
Owner SOUTHEAST UNIV
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