Method and device for formation, scattering component calculation and reconstruction of X-ray images

An X-ray and image technology, applied in the field of medical images, can solve the problems of radiotherapy position error, reduced image accuracy, and inability to achieve precise radiotherapy in the tumor area, and achieve the effect of reducing the amount of scattering and good mechanical stability.

Active Publication Date: 2016-02-17
SHANGHAI UNITED IMAGING HEALTHCARE
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Problems solved by technology

In the process of radiotherapy, cone beam CT is used to obtain images of patients in real time and conduct image guidance for radiotherapy. The reduction of image accuracy leads to position errors of radiotherapy, which cannot achieve the goal of precise radiotherapy for tumor regions.

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  • Method and device for formation, scattering component calculation and reconstruction of X-ray images
  • Method and device for formation, scattering component calculation and reconstruction of X-ray images
  • Method and device for formation, scattering component calculation and reconstruction of X-ray images

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Embodiment Construction

[0025] In order to make the above objects, features and advantages of the present invention more comprehensible, specific implementations of the present invention will be described in detail below in conjunction with the accompanying drawings. In the following description, specific details are set forth in order to provide a thorough understanding of the present invention. However, the present invention can be implemented in many other ways than those described here, and those skilled in the art can make similar extensions without departing from the connotation of the present invention. Accordingly, the present invention is not limited to the specific embodiments disclosed below.

[0026] figure 1 is a structural diagram of a radiotherapy system, such as figure 1 As shown, the radiation therapy system 100 includes a fixed part 101 and a rotating part 102. The rotating part 102 is installed on the fixed part 101. The rotating part 101 can rotate around the central axis 106, s...

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Abstract

The invention discloses a method and device for image formation, scattering component calculation and reconstruction of X-ray images. The method for image formation of the X-ray image comprises the following steps: collecting X-rays passing through a collimator and an imaging object in sequence to form an X-ray image group, wherein the collection is performed when the collimator moves along a first direction, and the X-ray image group is a group of X-ray images collected at different moments of the movement of the collimator; extracting sub-region images of each X-ray image in the X-ray image group; and combining the sub-region images along the first direction to form modulated X-ray images. In implementation of the technical scheme of the invention, the collimator is used for performing flexible modulation on X-ray intensity distribution, extra hardware is not increased, scattering components in the X-ray images are calculated, and finally the scattering quantity of the X-ray images is reduced.

Description

technical field [0001] The invention relates to the field of medical images, in particular to a method and device for forming, calculating and reconstructing X-ray images. Background technique [0002] In X-ray images, scattered rays have always been an important factor leading to unsatisfactory image quality. Especially for X-ray systems with a larger detector area, such as radiotherapy equipment, cone beam computed tomography (Cone Beam Computed Tomography) uses an Electronic Portal Imaging Device (EPID, Electronic Portal Imaging Device) as a detector for receiving X-rays , the scattered rays account for a large proportion of the X-rays it receives. Scattered rays cause cupping artifacts on the image, reduce the contrast of the image, and greatly reduce the image accuracy of the reconstructed image. During radiation therapy, cone-beam CT is used to obtain images of patients in real time and image-guid radiation therapy. The reduction of image accuracy leads to position e...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61B6/00
CPCA61B6/03A61B6/06A61B6/4035A61B6/5205A61B6/54G21K1/043A61N2005/1054A61B6/5282A61N5/1045A61N5/1049A61N2005/1095G06T2207/10116G06T5/002G06T5/003G06T5/50G06T2207/20212G06T5/001G06T2207/20224A61B6/032A61B6/5217
Inventor 李贵杨宏成徐璐
Owner SHANGHAI UNITED IMAGING HEALTHCARE
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