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

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, ...

AI Technical Summary

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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