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Computed tomography (CT) and method for determining unstable channel in detector

A detector and channel technology, applied in computerized tomography scanners, echo tomography, etc., can solve problems such as unstable channel defect readings, achieve the effect of improving CT image quality and reducing streak artifacts

Active Publication Date: 2014-03-19
SIEMENS SHANGHAI MEDICAL EQUIP LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

To date, no published patent applications have been found to identify unstable channels of detectors or flawed readings in raw data from reconstructed images

Method used

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  • Computed tomography (CT) and method for determining unstable channel in detector
  • Computed tomography (CT) and method for determining unstable channel in detector
  • Computed tomography (CT) and method for determining unstable channel in detector

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Embodiment Construction

[0041] In order to make the purpose, technical solution and advantages of the present invention clearer, the following examples are given to further describe the present invention in detail.

[0042] According to one embodiment of the present invention, the reconstructed image obtained by scanning a water phantom with CT equipment is used to determine the unstable channel in the detector, and further determine the defect readings in the original data, thereby modifying the original data and The value of the data point corresponding to the unstable channel and the defect reading. The water model is cylindrical, and the cylindrical bottom surface is located in the XY plane of the CT scanner (the plane perpendicular to the direction of hospital bed entry and exit), and the height direction of the cylinder is located in the Z direction of the CT scanner (the direction of hospital bed entry and exit). Of course, those skilled in the art can also choose water models of other shapes ...

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Abstract

The invention discloses computed tomography (CT) equipment, which comprises a CT scanner, an image reconstruction device, a strip-type artifact detection device and an unstable channel determining device, wherein the CT scanner at least comprises an X-ray tube and a detector; the detector is used for receiving X rays from the X-ray tube to generate the original data; the image reconstruction device is used for reconstructing an image according to the original data to acquire a reconstructed image; the strip-type artifact detection device is used for detecting a strip-type artifact in the reconstructed image; and the unstable channel determining device is used for determining an unstable channel corresponding to the strip-type artifact in the detector. The invention also discloses a method for determining the unstable channel in the detector. By the equipment and the method, the aim of determining the unstable channel in the detector according to the reconstruction image is fulfilled.

Description

technical field [0001] The present invention relates to the technical field of computerized tomography (Computed Tomography, CT), in particular to a CT device and a method for determining an unstable channel in a detector of the CT device. Background technique [0002] The detector is one of the key components of the data acquisition system (Data Acquisition System, DAS) in the CT equipment, and the performance of the detector directly affects the quality of the CT image. For example, in CT equipment, if a channel of the detector is unstable, artifacts will be produced in the reconstructed image. [0003] In the prior art, it mainly involves how to detect unstable channels of detectors based on raw data and defect readings in the raw data. To date, no published patent application has been found to identify unstable channels of detectors or flawed readings in raw data from reconstructed images. [0004] US patent application US6148057A filed on November 2, 1998 discloses a ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): A61B6/03
Inventor 杜春华王薇
Owner SIEMENS SHANGHAI MEDICAL EQUIP LTD
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