Novel large-view-field linear scanning CT system and image reconstruction method

A technology of linear scanning and image reconstruction, applied in the field of X-ray imaging detection, can solve the problem of not being able to image the whole object, and achieve the effects of low cost, enlarged scanning range and simple scanning method.

Pending Publication Date: 2020-10-30
CHONGQING UNIV
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Problems solved by technology

In order to realize imaging of objects beyond the field of view of linear scan CT, the patent with publication number CN106447740 proposes a relatively parallel linear scan CT region of interest image reconstruction method. imaging, but this method cannot image the entire object

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  • Novel large-view-field linear scanning CT system and image reconstruction method
  • Novel large-view-field linear scanning CT system and image reconstruction method
  • Novel large-view-field linear scanning CT system and image reconstruction method

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Embodiment Construction

[0046] Embodiments of the present invention are described below through specific examples, and those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification. The present invention can also be implemented or applied through other different specific implementation modes, and various modifications or changes can be made to the details in this specification based on different viewpoints and applications without departing from the spirit of the present invention. It should be noted that the diagrams provided in the following embodiments are only schematically illustrating the basic concept of the present invention, and the following embodiments and the features in the embodiments can be combined with each other in the case of no conflict.

[0047] see Figure 1 to Figure 6 , figure 1 It is a model diagram of a new large field of view linear scan CT system, which includes an X-ray source 1, a de...

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Abstract

The invention relates to a novel large-view-field linear scanning CT system and an image reconstruction method, and belongs to the technical field of X-ray imaging detection. The system comprises an X-ray source, a detector, a detection object, a data acquisition system, an image processing system, a control system and a mechanical system. The X-ray source is a cone beam ray source, and the detector is an area array flat panel detector. In the scanning process, the detector is fixed, and the X-ray source does parallel linear motion relative to the detector. Compared with a traditional CT system, the imaging view field is enlarged, and the CT system has the advantages of being simple in structure, low in cost, easy to achieve and the like. For image reconstruction of the large-view-field linear scanning CT system, an optimization reconstruction algorithm based on TV minimization is constructed, projection data collected by the system can be directly reconstructed, and good noise resistance and artifact removal capacity are achieved.

Description

technical field [0001] The invention belongs to the technical field of X-ray imaging detection, and relates to a novel large-field linear scanning CT system and an image reconstruction method. Background technique [0002] Since its invention, computed tomography (CT) has been widely used in medical, industrial, security inspection and other fields. In the medical field, limited by the structure of CT machines, it is often powerless to perform CT scans on some obese patients. In the field of industrial and security inspection, there are still problems to be solved urgently in the tomographic detection of some large objects beyond the field of view of traditional cone beam CT, such as containers, engines, and large turbine blades. On the other hand, in CT detection, the size of the detection object must be within the scanning field of view. If the detection object is too large, the magnification ratio needs to be appropriately reduced, and the image resolution is sacrificed ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61B6/03
CPCA61B6/032A61B6/4208A61B6/4476
Inventor 刘丰林余海军李雷谭川东
Owner CHONGQING UNIV
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