Method and system for reducing ringing in x-ray images

A ringing effect, X-ray technology, applied in the field of image processing, can solve problems such as ringing effect

Active Publication Date: 2021-08-10
GENERAL ELECTRIC CO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, while filtering with a band-stop filter to reduce raster artifacts, the band-stop filter can cause ringing during convolution due to the asymmetric intensity distribution on the X-ray image

Method used

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  • Method and system for reducing ringing in x-ray images
  • Method and system for reducing ringing in x-ray images
  • Method and system for reducing ringing in x-ray images

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Embodiment Construction

[0027] In order to help those skilled in the art to accurately understand the claimed subject matter of the present invention, the specific implementation manners of the present invention will be described in detail below in conjunction with the accompanying drawings. In the following detailed descriptions of these specific embodiments, this specification does not describe some well-known functions or structures in detail to avoid unnecessary details affecting the disclosure of the present invention.

[0028] Unless otherwise defined, the technical terms or scientific terms used in the claims and the specification shall have the ordinary meanings understood by those skilled in the technical field to which the present invention belongs. "First", "second" and similar words used in the specification and claims do not indicate any order, quantity or importance, but are only used to distinguish different components. "A" or "one" and similar words do not indicate a limitation of num...

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Abstract

The invention discloses a method for reducing the ringing effect in an X-ray image, which includes: acquiring an X-ray image by scanning an object, wherein the X-ray image includes raster artifacts; applying a first bandwidth filter to the X-ray image respectively filter and a second bandwidth filter, thereby obtaining a filtered first image and a filtered second image, wherein the first bandwidth filter and the second bandwidth filter have different bandwidths; construct a weight map according to the X-ray image ; and using the weight map to fuse the filtered first image and the filtered second image to obtain an output image. The invention also discloses a system using the above method.

Description

technical field [0001] The present invention generally relates to image processing techniques, and more particularly to a method and system for reducing ringing effects in X-ray images. Background technique [0002] In the existing X-ray image system, the X-ray emitted from the X-ray source can penetrate the object and be imaged, and the primary beam of X-ray can be shot to the digital image detector, thus forming the digital radiography imaging projected image. However, scattered beams are generated when the primary beam passes through the object, and these scattered beams may reduce image contrast and degrade image quality. In order to remove these undesired scattered beams, an anti-scatter grid array is usually used between the X-ray source and the image detector. Existing anti-scatter grid arrays consist of alternating stripes made of an X-ray transparent material such as aluminum or carbon and an X-ray absorbing material such as lead. The anti-scatter grid array pref...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06T5/00
CPCG06T5/003G06T2207/10116G06T2207/20024G06T5/005G06T5/10G06T5/002H04N5/325
Inventor 张朝霞陶鲲宣晓闫铭康涵
Owner GENERAL ELECTRIC CO
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