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Multi-time horizontal movement staggered spiral industrial CT scanning imaging method

A technology of CT scanning and imaging methods, applied in the field of CT scanning, can solve the problems of limited life and low detection efficiency, and achieve the effects of reducing hardware costs, high reconstruction quality, and reducing CT detection costs

Active Publication Date: 2015-06-10
CHONGQING UNIV
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  • Application Information

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Problems solved by technology

Between two layers of scanning, the accelerator needs to stop emitting beams (because the life of the accelerator is limited, and the life of its core components is about 500-800 hours), so the detection efficiency is low

Method used

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  • Multi-time horizontal movement staggered spiral industrial CT scanning imaging method
  • Multi-time horizontal movement staggered spiral industrial CT scanning imaging method
  • Multi-time horizontal movement staggered spiral industrial CT scanning imaging method

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Experimental program
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Embodiment Construction

[0026] The preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0027] A kind of multi-translation interlaced helical industrial CT scanning imaging method provided by the present invention, the flow process of this method is as follows figure 1 shown. Since the clockwise rotation of the object around the turntable is equivalent to the counterclockwise rotation of the ray source and detector around the turntable, similarly, the counterclockwise rotation of the object around the turntable is equivalent to the clockwise rotation of the ray source and detector around the turntable. For the convenience of description, the following All the descriptions assume that the object is fixed, the ray source and detector rotate around the turntable, and the ray source and detector are also assumed to translate along the axis of the turntable. The following description uses four translations of the turntable to illu...

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Abstract

The invention relates to a multi-time horizontal movement staggered spiral industrial CT scanning imaging method, and belongs to the technical field of CT scanning. The method comprises the steps that in the scanning period, a carrying rotary table rotates in one direction all the time, the rotary table only needs to transversely horizontally move in the direction parallel to a detector at the two-time spiral scanning interval and does not need to move in the radial direction, and staggered spiral scanning is achieved through a radiation source and the axial reciprocating movement of the detector. The multi-time horizontal movement staggered spiral industrial CT scanning imaging method is suitable for high-precision and rapid three-dimensional imaging of a III generation CT large-size workpiece. High-precision and rapid three-dimensional imaging is achieved through a III generation linear array detector CT system, the detector physical interpolation is not needed in the scanning process, the structure of the CT system is simplified on the premise that the detection precision is guaranteed, the manufacturing cost of the CT system is reduced, and the detecting efficiency is effectively improved.

Description

technical field [0001] The invention belongs to the technical field of CT scanning, and relates to a multi-translation interlaced spiral industrial CT scanning imaging method. Background technique [0002] Limited by the size and cost of detectors, the main layout of large-scale high-energy industrial CT equipment is still Generation II, Generation III or Generation II+III. The detectors are basically linear array detectors, and there are few area array detectors. . Therefore, the detection efficiency is low and the detection cost is high. In order to reduce the crosstalk between detectors in high-energy CT, the rays generally need to be collimated through a “tunnel-type” collimator before entering the detectors, because each detector unit needs to have a corresponding collimator. Objectively, the number of detectors per unit length is small, the cost of a single detector is high, and large-scale integration cannot be carried out. Without increasing the detection density,...

Claims

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Application Information

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IPC IPC(8): G01N23/04
Inventor 沈宽粱良邹晓兵
Owner CHONGQING UNIV
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