Volume 22 Issue 5
May  2007
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Article Navigation >  Journal of Aerospace Power  > 2007  >  22(5): 768-772
WEI Dong-bo, FU Jian, LI Bin, ZHANG Lei. Scan mode and its reconstruction algorithm for improving spatial resolution of 3D-ICT[J]. Journal of Aerospace Power, 2007, 22(5): 768-772.
Citation: WEI Dong-bo, FU Jian, LI Bin, ZHANG Lei. Scan mode and its reconstruction algorithm for improving spatial resolution of 3D-ICT[J]. Journal of Aerospace Power, 2007, 22(5): 768-772.
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Scan mode and its reconstruction algorithm for improving spatial resolution of 3D-ICT

  • School of Mechanical Engineering and automation, Beijing University of Aeronauticsand Astronautics, Beijing 100083, China

  • Received Date: 2007-01-19
  • Rev Recd Date: 2007-04-02
  • Publish Date: 2007-05-28
    Abstract
  • Spatial resolution improvement techniques for three dimensional industrial computed tomography(3D-ICT) have been researched in this paper.A cone-beam 3D-ICT scan mode was proposed to improve the spatial resolution by the quarter-detector offset.Its filter back-projection reconstruction algorithm based on the parallel beam rebin principle was deduced.Firstly this method acquires the two dimensional projection sequence by offsetting the detector center a quarter of the detector channel width with respect to the iso-center.Secondly it rebins these projects into parallel data.Finally it doubles the sampling frequency of parallel data with the symmetry between two projection view angles with an angle interval 180°.Computer simulation results prove the correction and the validity of this algorithm.Using this algorithm,the spatial resolution can be improved approximate 100% along the horizontal reconstruction direction.

     

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    • References(9)
  • [1]
    程云勇,张定华,赵歆波,等.涡轮叶片锥束体积CT检测软件原型[J].中国机械工程,2005,16(20):1835-1838.CHENG Yunyong,ZHANG Dinghua,ZHAO Xinbo,et al.Software prototype of the turbine blade cone-beam volume CT inspection system[J].China Mechanical Engineering,2005,16(20):1835-1839.
    [2]
    程云勇,张定华,毛海鹏,等.一种基于工业CT的航空发动机涡轮叶片生产检测系统关键技术研究[J].制造技术与机床,2004(1):27-30.CHENG Yunyong,ZHANG Dinghua,MAO Haipeng,et al.Research on key techniques of inspection system for aero-engine turbine blade based on industrial CT[J].Manufacturing Technology and Machine Tool,2004,(1):27-30.
    [3]
    Hsieh J.Computed tomography-principles,designs,artifacts,and recent advances[M].Bellingham,WA:SPIE,2003.
    [4]
    Hsieh J.Optimization of detector geometry for aliasing artifact reduction in the third-generation CT[J].SPIE Vol.3032:204-212,1997.
    [5]
    Lonn A H.Comuted tomography system with translatable focal spot[P].USA:5173852,1990.
    [6]
    Kachelrieβ M.CT basics from single-slice to cone-beam spiral CT[EB/OL].http:www.imp.uni-erlangen.de,2005.
    [7]
    张朋,郭明焕.由相叠的低分辨率扇形束投影数据重建高分辨率CT图像[J].核技术,2002,25(10):805-810.ZHANG Peng,GUO Minghuan.Reconstructing high resolution image from overlapped low resolution fan beam projections data[J].Nuclear Techniques,2002,5(10):805-810.
    [8]
    Keat N.Understanding imaging performance(I)-spatial resolution and Z-sensitivity[EB/OL].http:www.imp.uni-erlangen.de,2005.
    [9]
    FU Jian,LU Hongnian.Research of large field of view scan mode for industrial CT[J].Chinese Journal of Aeronautics,2003,16(1):59-64.
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