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A method and device for three-dimensional cone-beam computed tomography of an x-ray cylinder

A tomography and computer technology, applied in the field of X-ray computer tomography, can solve the problems of difficult to solve CT imaging, X-ray computer tomography technology has not yet been found, etc., to achieve reduced reconstruction volume and strong readability , the effect of simple steps

Active Publication Date: 2021-05-25
BEIHANG UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the reconstruction of this technology is still an orthogonal plane slice image, and it is still difficult to solve the CT imaging problem of the hollow cylinder cylindrical structure
[0005] At present, no X-ray computed tomography technology that can solve the above problems has been found.

Method used

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  • A method and device for three-dimensional cone-beam computed tomography of an x-ray cylinder
  • A method and device for three-dimensional cone-beam computed tomography of an x-ray cylinder
  • A method and device for three-dimensional cone-beam computed tomography of an x-ray cylinder

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Embodiment Construction

[0045] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

[0046] figure 1The flow chart of the X-ray cylindrical three-dimensional cone-beam computed tomography method provided for the embodiment of the present invention; the embodiment of the present invention is aimed at the existing X-ray CT imaging, and the slice images are all horizontal, flat and vertical orthogonal coordinate system tomographic images, which are difficult to obtain. High-resolution visually presents the cylindrical features and defects of cylindrical components, and provides an X-ray three-dimensional cone-beam computer tomography method based on a new cylindrical filter back projection reconstruction algorithm. The specific steps of this method are as follows:

[0047] Step S101. Obtain a sequence of two-dimensional projection images collected by the detector. The sequence of two-dimensional projection images is obtained after...

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Abstract

The invention discloses an X-ray cylindrical three-dimensional cone-beam computed tomography method and device. The method comprises: acquiring a sequence of two-dimensional projection images collected by a detector; performing logarithmic demodulation on the sequence of two-dimensional projection images The two-dimensional line integral image sequence is obtained; the cylindrical three-dimensional CT slice image of the object is obtained by performing image reconstruction on the two-dimensional line integral image sequence by using the cylindrical three-dimensional filtered back projection reconstruction algorithm. Compared with the existing CT scanning technology based on orthogonal plane slices, the embodiments of the present invention can visualize the structural features of objects along the cylinder in high-definition and three-dimensional without operations such as image rotation and three-dimensional space interpolation, which not only reduces the reconstruction volume, It saves image processing time, improves the reconstructed image quality, and enhances the readability of the image.

Description

technical field [0001] The invention relates to the technical field of X-ray computer tomography, in particular to a method and device for three-dimensional cone-beam computer tomography of an X-ray cylinder. Background technique [0002] In the X-ray computer tomography (Computed Tomography, referred to as CT) system, the X-ray source emits X-rays, which pass through a certain area of ​​the object to be detected from different angles, and the detectors placed opposite the ray source receive them at corresponding angles. Then, according to the different degrees of attenuation of rays at various angles, a certain reconstruction algorithm and computer operations are used to reconstruct the distribution mapping image of the ray line attenuation coefficient in the scanned area of ​​the object, so as to realize the reconstruction of the image by projection and reproduce the object in this area without loss. The characteristics of the medium density, composition and structure morp...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N23/046
CPCG01N23/046
Inventor 傅健何钊
Owner BEIHANG UNIV