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using a CT scan phantom

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  • using a CT scan phantom

    Hi all

    I am working on a software that uses CT scan values and convert them to
    Young's modulus. This process is divided in two steps. First convert the CT
    values to apparent densities and then convert these apparent densities to
    young's moduli. I am using this Electron Density Refernce Phantom to
    calibrate the CT scan. This phantom is made of two cylinder representing
    trabecular and cortical bone. The problem is that the documentation that
    comes with the system gives only those information :

    -Trabecular bone 200 mg/cc HA

    Physical density : 1.161

    Electron density per cc*1023: 3.730

    Electron density relative to H2O: 1.117

    -Dense Bone 800 mg/cc HA

    Physical density: 1.609

    Electron density per cc*1023: 5.052

    Electron density relative to H2O: 1.512

    My question is: what value shoud I use to get the apparent density that is
    mentioned in Carter formula for conversion to Young'modulus ?

    Thanks for your help.

    Thibaut Bardyn


    University of Bern

    Medical Faculty

    MEM Research Center

    Institute for Surgical Technology and Biomechanics

    Thibaut Bardyn

    Ph. D. Student

    Stauffacherstrasse 78

    CH-3014 Bern

    Tel. +41 31 631 59 37

    Fax +41 31 631 59 60