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Image reconstruction method and device, terminal and storage medium

An image reconstruction and iterative reconstruction algorithm technology, applied in the fields of image reconstruction, devices, terminals and storage media, can solve problems such as low reconstruction efficiency, achieve fast reconstruction, facilitate parallel computing, and improve efficiency.

Active Publication Date: 2020-07-31
SHANGHAI UNITED IMAGING HEALTHCARE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] Embodiments of the present invention provide an image reconstruction method, device, equipment, and storage medium to solve the problem of low reconstruction efficiency in the iterative reconstruction process of original scan data obtained based on oblique scanning, while ensuring image reconstruction quality. Improve image reconstruction efficiency

Method used

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  • Image reconstruction method and device, terminal and storage medium
  • Image reconstruction method and device, terminal and storage medium
  • Image reconstruction method and device, terminal and storage medium

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Embodiment 1

[0031] Figure 1A This is a flowchart of an image reconstruction method provided by the first embodiment of the present invention. This embodiment is applicable to the case of iteratively reconstructing projection data in a tilted coordinate system. The method can be executed by an image reconstruction device. The reconstruction device can be implemented by software and / or hardware. The image reconstruction device can be independently configured on a terminal or server to implement the image reconstruction method according to the embodiment of the present invention, or can cooperate with a data acquisition device to implement the image reconstruction method according to the embodiment of the present invention .

[0032] Such as Figure 1A As shown, the method of this embodiment may specifically include:

[0033] S110: Obtain original projection data obtained based on the oblique scanning method, and determine an initial value image corresponding to the original projection data.

[003...

Embodiment 2

[0052] figure 2 This is a flowchart of an image reconstruction method provided by the second embodiment of the present invention. The technical solution of this embodiment is combined with the above-mentioned optional solutions. Optionally, the iterative reconstruction algorithm and the initial image pair The iterative reconstruction of the original projection data to obtain an iterative reconstructed image includes: performing an orthographic projection on the initial value image to obtain an orthographic projection result, determining a total data error according to the orthographic projection result and the original projection data; calculating the For the regularization term of the initial value image, an iterative minimization equation is constructed according to the total data error and the regularization term, and the iterative minimization equation is iteratively solved to obtain an iterative reconstructed image.

[0053] In the technical aspects of the above technical so...

Embodiment 3

[0070] image 3 This is a structural block diagram of an image reconstruction device provided by this embodiment. The image reconstruction device can be implemented by software and / or hardware. The image reconstruction device can be independently configured on a terminal or server to implement the image reconstruction method of the embodiment of the present invention, or can cooperate with a data acquisition device to implement the image of the embodiment of the present invention. Reconstruction method. Such as image 3 As shown, the device may include: an initial image determination module 310, an iterative reconstruction module 320, and a target reconstruction module 330.

[0071] Wherein, the initial image determining module 310 is used to obtain the original projection data obtained based on the oblique scanning method, and to determine the initial image corresponding to the original projection data; the iterative reconstruction module 320 is used to obtain the original proje...

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Abstract

The embodiment of the invention discloses an image reconstruction method, device and equipment and a storage medium, and the method comprises the steps: obtaining original projection data obtained based on an inclined scanning mode, and determining an initial value image corresponding to the original projection data; performing iterative reconstruction on the original projection data based on an iterative reconstruction algorithm and the initial value image to obtain an iterative reconstruction image; carrying out interpolation on the iterative reconstruction image to obtain a target reconstruction image under an inclined coordinate system, wherein the X coordinates and the Y coordinates of the edge pixel points on the same side of each layer of sectional image arranged in the Z-axis direction corresponding to the initial value image in the inclined coordinate system are the same, the oblique coordinate system takes the direction parallel to the rotating shaft of the rack as a Z-axis direction, takes two orthogonal directions perpendicular to the rotating shaft as an X-axis and a Y-axis, the X-axis is perpendicular to the working surface of the scanning bed, the Y-axis is parallelto the working surface of the scanning bed, and the origin of coordinates is a rotating center. According to the technical scheme of the embodiment of the invention, the iterative reconstruction efficiency can be improved.

Description

Technical field [0001] The embodiments of the present invention relate to the technical field, and in particular, to an image reconstruction method, device, equipment, and storage medium. Background technique [0002] In the field of medical imaging technology, there are many scanning methods that can be used when scanning objects based on Computed Tomography (CT). With the development of medicine, users have higher and higher requirements for radiation dose during scanning. The oblique axial scanning method has been widely used because it can effectively reduce the radiation of some special parts (such as eyes). [0003] In oblique axial scanning, the gantry has a certain inclination angle relative to the axis of motion of the treatment bed. In order to keep the reconstructed image centers of different tomographic images on the axis parallel to the moving direction of the treatment bed when performing image reconstruction on the scan data scanned by the oblique axis, the reconst...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06T11/00
CPCG06T11/003
Inventor 孙昊桦
Owner SHANGHAI UNITED IMAGING HEALTHCARE
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