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    Construction and Operation of the MARS-CT Scanner

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    Author
    Zainon, R.
    Butler, A.P.H.
    Cook, N.J.
    Butzer, J.S.
    Schleich, N.
    De Ruiter, N.
    Tlustos, L.
    Clark, M.J.
    Heinz, R.
    Butler, P.H.
    Date
    2009
    Permanent Link
    http://hdl.handle.net/10092/3121

    The aim of this project is to build a spectroscopic CT scanner capable of taking multiple energy CT images of small animal and pathology specimens. The current prototype scanner uses a conventional x-ray tube and a Medipix2 x-ray detector (developed by the European Organisation for Nuclear Research - CERN) that is capable of photon counting and energy discrimination. The scanner is referred to as the Medipix All Resolution System-CT (MARS-CT). We designed and constructed the gantry and control electronics so that the detector and x-ray tube could be rotated around an object of up to 100 mm diameter. Software was written to control the scanner and reconstruct the spectroscopic projection data into a 3D volume, using cone beam filtered back projection. The scanner successfully takes 3D images at 43 µm resolution. The use is able to define the energy ranges known as energy bins. The scanner's stability, accuracy and image quality was proven and tested. We successfully scanned a range of small objects including mice.

    Subjects
    Fields of Research::320000 Medical and Health Sciences::321000 Clinical Sciences::321022 Radiology and organ imaging
     
    Fields of Research::290000 Engineering and Technology::291500 Biomedical Engineering
     
    Fields of Research::240000 Physical Sciences::249900 Other Physical Sciences::249903 Instruments and techniques
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    • Engineering: Conference Contributions [1816]
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    http://library.canterbury.ac.nz/ir/rights.shtml

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