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Method and device for obtaining maximum value and gray value image in image reconstruction

A technology of image reconstruction and acquisition method, which is applied in the fields of radiological diagnosis instruments, medical science, mammography, etc., which can solve the problems of patient discomfort, reduction of imaging time, and limitation of scanning speed by the rotation speed of the scanning frame.

Active Publication Date: 2021-01-01
SHANGHAI UNITED IMAGING HEALTHCARE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Long imaging times can cause patient motion blur that degrades image quality and can cause patient discomfort
Additionally, the power of the X-ray source, gantry rotation speed, and detector frame rate limit the scan speed of current DBT systems
[0005] The mammography machine can only generate the fused 2D image of the breast tomographic image after the reconstruction of all the breast tomographic images is completed. The execution time of the 2D image algorithm is also more, which may cause the doctor to wait for a longer time to generate the breast fusion 2D image

Method used

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  • Method and device for obtaining maximum value and gray value image in image reconstruction
  • Method and device for obtaining maximum value and gray value image in image reconstruction
  • Method and device for obtaining maximum value and gray value image in image reconstruction

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Embodiment 1

[0042] figure 1 It is a schematic diagram of the implementation process of the method of the present invention, consisting of figure 1 It can be seen that the flat-panel detector can receive multiple rays emitted by the X-ray source, that is, multiple X-rays. Since the resolution of the flat-panel detector is limited, when calculating, the pixel unit of the flat-panel detector is used as the unit to set each pixel unit Receive a ray emitted by the X-ray source, and the reconstructed tomographic image of each layer has an intersection point with the ray. Therefore, each time a layer of tomographic image is reconstructed, a ray between the ray source and the flat panel detector will reconstruct the tomographic image with this layer An intersection point is generated, the gray value at the intersection is obtained, and the gray value is stored and calculated. Finally, the obtained gray value is used to fuse the 2D image, thereby realizing the parallel processing of the image reco...

Embodiment 2

[0061] Such as image 3 Shown, the present invention also provides a kind of acquisition device of maximum value and gray value image in image reconstruction, comprising:

[0062] An acquisition module, configured to acquire a single-layer reconstructed tomographic image;

[0063] a gray value acquisition module, configured to acquire the gray value at the intersection of each ray and the reconstructed tomographic image of the single layer;

[0064] A calculation module, configured to calculate the maximum value or the sum of the gray values ​​of each ray at the intersection of the traversed reconstructed tomographic images;

[0065] Judging module, used to judge whether all the tomographic images have been reconstructed, if so, generate the maximum value image and the average value according to the maximum value and the sum of the gray value at the intersection of each ray and all reconstructed tomographic images image.

[0066] The present invention may also include a fus...

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Abstract

The invention discloses a method and device for acquiring a maximum-value and grey-value image in image reconstruction. During reconstruction of a next layer of cross-section image, a part of 2D integration operations of a previous layer of image can be conducted; when the cross-section image is reconstructed, only the last layer of reconstructed cross-section image needs to be processed; sums of the maximum values and the grey values of all the cross-section images can be computed in a very short time, and an integrated 2D image can be generated. The invention also discloses a device for acquiring the maximum-value and gray-value image in the image reconstruction. In comparison with the prior art which is characterized in that the integrated 2D image is generated after reconstruction of all the cross-section images, the acceleration method with parallel generation of the integrated 2D image disclosed by the invention has the advantages that time spent on generation of the integrated 2D image after reconstruction of all the mammary gland cross-section images does not increase with the increase of reconstructed layers; waiting time of a doctor for generation of the integrated 2D image is shortened greatly; and image integration efficiency is increased.

Description

technical field [0001] The invention mainly relates to mammary gland tomography technology, in particular to a method and a device for acquiring maximum value and gray value images in image reconstruction. Background technique [0002] Breast cancer is an important disease that seriously threatens women's health worldwide. Mammography is currently recognized as the preferred screening modality for breast cancer. In recent years, with the continuous update of imaging equipment, the emergence of digital breast tomosynthesis technology, also known as digital breast tomosynthesis (Digital Breast Tomosynthesis, DBT), has further improved the early detection and diagnosis of breast cancer. [0003] Digital breast tomography is a three-dimensional imaging technology. It is reconstructed from a series of low-dose breast projection images taken from different angles and synthesized into a three-dimensional breast tomographic reconstruction image containing a series of high-resolutio...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): A61B6/00
CPCA61B6/502A61B6/5217A61B6/5223
Inventor 王汉禹张娜杨乐徐亮
Owner SHANGHAI UNITED IMAGING HEALTHCARE