Cone beam double-helix CT Scanning and imaging method for large sized object

A CT scanning and double helix technology, applied in the field of cone beam double helix CT scanning imaging, can solve the problems of increasing the difficulty of mechanical realization, the transverse beam angle of the radiation source cannot include the cross section of the object, and cannot meet the detection needs, etc.
CN101393145AInactive Publication Date: 2009-03-25CHONGQING UNIV
0 Cites 19 Cited by

Patent Information

Authority / Receiving Office
CN ยท China
Current Assignee / Owner
CHONGQING UNIV
Publication Date
2009-03-25
Estimated Expiration
Not applicable ยท inactive patent

Smart Images

  • Figure 1
    Figure 1
  • Figure 2
    Figure 2
  • Figure 3
    Figure 3
Patent Text Reader

Abstract

The invention discloses a cone-beam double-spiral CT scanning and imaging method for a large-sized object. The method comprises the following steps: after a turntable provided with a work piece to be detected translates twice along the direction vertical to a central ray, and the work piece and the turntable rotate around a rotating shaft; meanwhile, a ray source and a detector lift and scan along the direction of the rotating shaft to form parallel double-spiral scanning tracks and acquire a three-dimensional image of an area to be detected through a three-dimensional reconstruction method improved by the invention. The method realizes the detection of large objects by using the structure of the prior CT machine, the ray source and the detector do not need to deflect, and the turntable and the work piece to be detected do not need to translate along the radial direction (in the direction parallel to the central ray), so the scanning process is easy to realize mechanically, the transverse size of the detected object doubles that of the prior single-spiral CT, complete projection data of the object can be acquired, and the detection for long objects with large transverse sizes can be realized; and the method does not need to rearrange and interpolate projection data, has high detection precision, only scans the spiral track twice, and has high detection efficiency.
Need to check novelty before this filing date? Find Prior Art

Description

technical field

[0001] The invention relates to a CT scanning imaging method, in particular to a cone-beam double-helical CT scanning imaging method for large-sized objects. Background technique

[0002] In CT detection technology, the cone beam helical scanning method and the corresponding imaging method can solve the detection problem of long objects, with high detection efficiency and good axial resolution. However, the lateral size of the object to be detected is often large, and the lateral beam angle of the radioactive source cannot cover the cross-section of the object. At this time, the conventional cone beam helical scanning method cannot meet the detection needs.

[0003] In order to solve the above problems, the cone-beam CT in which the ray source and detector are extended from one offset to three offsets appears, but the object needs to be translated in the direction perpendicular to and parallel to the central ray during scanning, and the ray source and detecto...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More