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Fault direction adjustable three-dimensional image reconstruction method and system for cone-beam CT (computed tomography)

A three-dimensional image and tomographic image technology, applied in the field of X-ray CT, can solve problems such as reducing the spatial resolution of images, and achieve the effects of improved spatial resolution, simple method and easy implementation.

Active Publication Date: 2015-05-06
天津三英精密仪器股份有限公司
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Problems solved by technology

Although a "positive" tomographic image can be obtained through 3D interpolation, this method will also reduce the spatial resolution of the image

Method used

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  • Fault direction adjustable three-dimensional image reconstruction method and system for cone-beam CT (computed tomography)
  • Fault direction adjustable three-dimensional image reconstruction method and system for cone-beam CT (computed tomography)
  • Fault direction adjustable three-dimensional image reconstruction method and system for cone-beam CT (computed tomography)

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Embodiment Construction

[0032] Below in conjunction with embodiment, the present invention is further described; Following embodiment is illustrative, not limiting, can not limit protection scope of the present invention with following embodiment.

[0033] The equipment used in the present invention, unless otherwise specified, is commonly used equipment or devices in the art; the method used in the present invention, unless otherwise specified, is commonly used in the art.

[0034] A three-dimensional image reconstruction method with adjustable slice direction of cone beam CT, the specific steps are as follows:

[0035] Step S1. Scan the measured object through the CT system to obtain CT system scanning data;

[0036] Step S2. Perform image reconstruction on the scan data of the CT system through the pre-reconstruction module, the image coordinate system used during reconstruction is consistent with the coordinate system of the scanning system, and the reconstruction algorithm adopts an analytical m...

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Abstract

The invention relates to a fault direction adjustable three-dimensional image reconstruction method for cone-beam CT (computed tomography). The method includes the steps: scanning a measured object by a CT system; performing image reconstruction for scanning data of the CT system by a pre-reconstruction module; acquiring image coordinate system parameters corresponding to a view fault image by a parameter adjusting module; acquiring a three-dimensional image of the measured object by a reconstruction module. The method is simple, convenient to operate, easy to implement and low in cost, parameters describing a reconstructed image coordinate system are more visually adjusted, the spatial resolution of the acquired reconstructed three-dimensional image is greatly improved, an image of a fault in the arbitrary direction of the measured object can be reconstructed, operation of a user is facilitated, and working efficiency is improved. In addition, by the method, an area of interest can be reconstructed, reconstruction of an area outside the area of interest is avoided, so that calculated amount is decreased, and reconstruction speed is increased.

Description

technical field [0001] The invention belongs to the technical field of X-ray CT, and relates to a method for reconstructing a three-dimensional image of a measured object from cone beam CT scanning data, in particular to a three-dimensional image reconstruction method in which the slice direction of cone beam CT can be adjusted. Background technique [0002] Cone beam CT has been widely used in industrial non-destructive testing and medical diagnosis due to its advantages of high radiation utilization rate and fast scanning speed. [0003] At present, when commercial cone-beam CT equipment performs three-dimensional image reconstruction, the image coordinate system adopted is consistent with the coordinate system of the scanning system. Therefore, the reconstructed image slices are perpendicular to the rotation axis of the turntable. However, in actual testing, it is difficult to place the measured object in line with the coordinate system of the scanning system. For exampl...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06T17/00A61B6/03
CPCA61B6/03G06T17/00
Inventor 赵云松张朋
Owner 天津三英精密仪器股份有限公司
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