• Admin
    UC Research Repository
    View Item 
       
    • UC Home
    • Library
    • UC Research Repository
    • College of Engineering
    • Engineering: Conference Contributions
    • View Item
       
    • UC Home
    • Library
    • UC Research Repository
    • College of Engineering
    • Engineering: Conference Contributions
    • View Item
    JavaScript is disabled for your browser. Some features of this site may not work without it.

    Browse

    All of the RepositoryCommunities & CollectionsBy Issue DateAuthorsTitlesSubjectsThis CollectionBy Issue DateAuthorsTitlesSubjects

    Statistics

    View Usage Statistics

    Development of a CT scanner based on the Medipix family of detectors

    Thumbnail
    View/Open
    12631563_MARSpaper.pdf (363.6Kb)
    Author
    Bones, P.J.
    Butler, A.P.H.
    Ronaldson, J.P.
    Opie, A.M.T.
    MARS-CT Team
    Date
    2010
    Permanent Link
    http://hdl.handle.net/10092/5257

    Photon counting detectors are of growing importance in medical imaging because they enable routine measurement of photon energy. Detectors such as Medipix2 and Medipix3 record the energy of incident photons with minimal loss of spatial resolution. Their use is being investigated for both pre-clinical and clinical applications of X-ray CT. The Medipix3 detector has 256 x 256 55 µm pixels and a silicon or cadmium telluride detector layer, giving a spatial resolution comparable to mammographic film. Each Medipix pixel can be seen as an individual spectral detector. The logic circuits for each pixel (some 1300 transistors) can analyze incoming events at megahertz rates, comparing the charge of the electron-hole cloud with preset levels, giving a resolution of about 2 keV across the range of 8 - 140 keV. A prototype CT scanner has been developed for laboratory animals and excised specimens. Applications under investigation include: K-edge imaging: Using spectral information to measure heavy elements (e.g., preparations of iodine, barium, and gadolinium) and Soft tissue contrast: Dual energy systems have shown that image contrast for soft tissue can be improved, e.g., distinguishing between iron and calcium within vascular plaques.

    Subjects
    Field of Research::11 - Medical and Health Sciences::1103 - Clinical Sciences::110320 - Radiology and Organ Imaging
     
    Field of Research::02 - Physical Sciences::0299 - Other Physical Sciences::029903 - Medical Physics
    Collections
    • Engineering: Conference Contributions [2012]
    Rights
    https://hdl.handle.net/10092/17651

    UC Research Repository
    University Library
    University of Canterbury
    Private Bag 4800
    Christchurch 8140

    Phone
    364 2987 ext 8718

    Email
    ucresearchrepository@canterbury.ac.nz

    Follow us
    FacebookTwitterYoutube

    © University of Canterbury Library
    Send Feedback | Contact Us