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spherical reflective markers

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  • spherical reflective markers


    Let me first introduce myself. I am a graduate student investigating
    anterior tibial translation in ACL deficient limbs using intra-cortical
    pins affixed with reflective markers.

    In late January, Dipl.-Ing. Gunther Paul posted a question regarding
    European distributors of reflective markers. I have obtained his build it
    yourself summary and his e-mail address by referencing the biomch-l
    archives in the hopes of obtaining his comprehensive summary. However, I
    have been unable to contact him at the posted address so I have the
    unenviable task of having to re-post this question. Sorry about the mail

    Ideally, we require 7-8 mm diameter spherical markers as manually producing
    high quality inexpensive markers is not feasible. In our experience,
    gluing 2 reflective hemispheres to obtain a perfect sphere has been
    problematic as our infrared motion analysis system (MacReflex) identifies
    these markers as 2 distinct markers and it is unable to determine the
    markers centre. Therefore we need a distributor who produces small
    spherical markers rather than hemispheres much like those produced by
    Qualisys. Furthermore, these markers must be threaded so as to be able to
    screw them onto our intra-cortical pin fixture. Your replies would be
    greatly appreciated and I will post the comprehensive summary.

    Thanks in advance
    Dan Ramsey

    Dan Ramsey

    Motoriklab, plan -1
    S:t Göransgatan 141
    112 81 Stockholm
    Tel: +46 (0)8 672 47 04
    Fax: +46 (0)8 672 49 15