Digital filter wire grid imaging method used for eliminating scattered radiation influence

An imaging method and scattering radiation technology, applied in the field of medical imaging, can solve problems such as high noise, unstable image effect, and inability to meet diagnostic requirements, and achieve the effects of reducing weakening, improving stability, and improving quality

Active Publication Date: 2016-10-19
NANOVISION TECHNOLOGY (BEIJING) CO LTD
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Problems solved by technology

[0006] 1) Since the virtual grid does not filter the scattered rays reaching the detector surface, all the scattered rays and straight-ray data are sampled. For thick body photography, where the proportion of scattered rays is very large, the tiny details of the straight rays are in the When it reaches the detector, it has been "flooded" by a large number of scattered rays, so these tiny details cannot be restored by virtual grid technology, which cannot meet the diagnostic requirements of this thick body position application
[0007] 2) Over-enhancement, large noise, and strong edges (such as metal edges) in the image have halo phenomenon
[0008] 3) In the absence of AEC (Automatic Exposure Control, automatic exposure control), the image effect is unstable

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  • Digital filter wire grid imaging method used for eliminating scattered radiation influence
  • Digital filter wire grid imaging method used for eliminating scattered radiation influence
  • Digital filter wire grid imaging method used for eliminating scattered radiation influence

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Embodiment Construction

[0043] The technical content of the present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0044] Such as figure 1 As shown, the digital grid imaging method for eliminating the influence of scattered radiation provided by the present invention specifically includes the following steps: first, the adaptive logarithm ( LOG) curve to adjust the brightness of the image to improve the influence of radiation hardening, especially for thick body images; then, according to the formula: F(x, y) = 1-F(x, y) to do highlighting processing; finally, Laplacian pyramid decomposition is performed on the image after the anti-whitening processing, enhancement and descattering processing are performed on each layer, and the output image is obtained by merging. The digital grid imaging method for eliminating the influence of scattered radiation provided by the present invention can improve the problem of poor image qu...

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Abstract

The invention discloses a digital filter wire grid imaging method used for eliminating a scattered radiation influence. The method comprises the following steps of S1, using data in an area of interest to calculate an adaptive logarithmic curve so as to correct image brightness; S2, carrying out anti-white processing on the image on which the brightness correction is performed; and S3, carrying out virtual filter wire grid processing on the image after the anti-white processing so as to acquire an output image. By using the method of the invention, a problem that thick body position image quality is not good can be solved; simultaneously, a problem that an effect is not stable during an actual usage process is effectively solved too; stability and the image quality are greatly increased; and under the condition that a patient radiation dosage level is reduced, diagnosis quality is guaranteed.

Description

technical field [0001] The invention relates to a digital grid imaging method, in particular to a digital grid imaging method for eliminating the influence of scattered radiation, and belongs to the technical field of medical imaging. Background technique [0002] High-energy rays, including X-rays and gamma rays, have strong penetrating power and can penetrate many substances that are opaque to visible light. With this penetrating power, these high-energy rays can be used to aid in medical diagnosis and treatment as well as non-destructive material inspection in industry. [0003] When using high-energy rays to detect objects, it is inevitable to generate a large number of scattered rays during the imaging process. These scattered rays will adversely affect the sharpness and signal-to-noise ratio of the image. Taking X-ray, which is currently the most widely used, as an example, in order to solve the influence of scattered rays generated by X-rays in the imaging process, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06T5/00G06T7/00
Inventor 李运祥曹红光常彤崔志立康小维
Owner NANOVISION TECHNOLOGY (BEIJING) CO LTD
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