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Metal artifact elimination method and system of ct system

A technology of metal artifacts and CT scanning, applied in the field of image processing, can solve the problems of difficult diagnosis, weak practicability, loss of image information, etc.

Active Publication Date: 2016-08-17
SHENZHEN INST OF ADVANCED TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

These artifacts seriously affect the quality of CT images and bring great difficulties to doctors' diagnosis. The removal of metal artifacts has become a difficulty and hot spot in CT research.
[0003] The current metal artifact removal method is usually carried out after CT image reconstruction, and then removes metal artifacts, which will lose part of the image information
Moreover, the current metal artifact removal method has a large amount of computation and is weak in practicability

Method used

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  • Metal artifact elimination method and system of ct system
  • Metal artifact elimination method and system of ct system
  • Metal artifact elimination method and system of ct system

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Embodiment Construction

[0039] In order to solve the problems of partial image information loss and poor practicability in the current metal artifact elimination method, this embodiment provides a metal artifact elimination method for a CT system. The metal artifact elimination method of the CT system will be specifically described below in conjunction with specific embodiments.

[0040] Please refer to figure 1 , the method for eliminating metal artifacts of a CT system for protecting a protective relay provided in this embodiment includes the following steps:

[0041] Step S110: Perform two CT scans on the scan object under different voltage parameters to obtain high-voltage CT scan data and low-voltage CT scan data. In this step, a CT scanning device may be used to scan the scanning object. In the two scans, the voltage parameters of the CT scanning equipment were set to 100 kV and 40 kV respectively, so that the high-voltage CT scan data (denoted as D H ) and low-voltage CT scan data (denoted ...

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Abstract

The invention relates to a method for removing a metal artifact in a CT system. According to the method for removing the metal artifact in the CT system, when new CT scanning data are obtained after a series of data processing operation, the artifact information in CT projection data is basically filtered and does not exist on the new CT scanning data, the metal artifact is removed before an image is reconstructed, and accordingly the image information loss is effectively reduced. Meanwhile, high-voltage CT scanning data and low-voltage CT scanning data are converted into high-voltage CT converting data and low-voltage CT converting data, the data volume can be greatly reduced, the operand of the method for removing the metal artifact in the CT system is reduced, and the method has high practicality. The invention further provides a system for removing the metal artifact in the CT system, wherein the system adopts the method for removing the metal artifact in the CT system, and can effectively reduce the image information loss and has high practicality.

Description

technical field [0001] The present invention relates to the technical field of image processing, in particular to a method for eliminating metal artifacts of a CT (computed tomography, computer X-ray tomography technology) system and a system thereof. Background technique [0002] For medical CT imaging systems, when the scanned patient contains high-density substances such as metals (such as metal plastic devices in the human body, biopsy agents that patients must carry, metals in chips, etc.), after reconstructing the CT projection data, the reconstruction CT Radial artifacts or banding artifacts will appear in the image. These artifacts seriously affect the quality of CT images and bring great difficulties to doctors' diagnosis. The removal of metal artifacts has become a difficult and hot spot in CT research. [0003] The current metal artifact removal method is usually carried out after CT image reconstruction, and then removes metal artifacts, which will lose part of ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06T5/50A61B6/03
Inventor 胡战利郑海荣
Owner SHENZHEN INST OF ADVANCED TECH