C-arm tomography imaging method using semi-accurate filtered back-projection

A filter back projection and tomographic imaging technology, applied in the field of biomedical imaging, can solve problems that affect the accuracy of reconstruction results, are not conducive to parallel processing of algorithms, and resampling of projection data, etc.
CN102973291AInactive Publication Date: 2013-03-20UNIV OF ELECTRONIC SCI & TECH OF CHINA
4 Cites 16 Cited by

Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
UNIV OF ELECTRONIC SCI & TECH OF CHINA
Publication Date
2013-03-20
Estimated Expiration
Not applicable · inactive patent

Smart Images

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

Abstract

The invention discloses a tomography imaging method suitable for C-arm imaging equipment. The tomography imaging method is characterized by having shift invariant features, wherein the semi-accurate reconstruction is performed on cone-beam projection data obtained by scanning a circular arc track. The circular arc track is a short scanning track, namely a scanning track of pi and a fan angle, and is also an ultra-short scanning track, namely a track smaller than the short scanning track. The method comprises the following steps: weighing of partial derivatives of projection data; one-dimensional Hilbert transform in a horizontal or non-horizontal direction; and back projection of the circular arc track. Compared with FDK type-approximate reconstruction algorithms, the C-arm tomography imaging method using semi-accurate filtered back-projection has the advantages of small reconstruction accuracy error, small discretization error and the like.
Need to check novelty before this filing date? Find Prior Art

Description

technical field

[0001] The invention relates to a C-arm semi-precise filtering back-projection tomographic imaging method, which belongs to the field of biomedical imaging and is suitable for C-arm X-ray tomographic imaging. Background technique

[0002] The C-arm imaging system is mainly composed of a C-arm, an X-ray source and a flat-panel detector installed at both ends of the C-arm. The X-ray optical signal emitted by the X-ray source forms a cone beam in space, and the C-arm can rotate around the horizontal axis in a limited space with a maximum angle range. At the same time, the flat panel detector can collect the X-ray attenuated light Signal. These light signals can in turn be converted into cone beam projection data, which can be used to reconstruct CT tomographic images. The C-arm with CT tomography function has important application value in clinical diagnosis and surgical evaluation, and is an important technology with broad application prospects.

[0003] For...

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