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    High-resolution magnetic resonance imaging and diffusion tensor imaging of the porcine temporomandibular joint disc

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    Benavides_high-resolution_magnetic_resonance2014.pdf (643.0Kb)
    Issue Date
    2014-01-28
    Author
    Benavides, E.
    Bilgen, Mehmet
    Al-Hafez, Baraa
    Alrefae, T.
    Wang, Y
    Spencer, Paulette
    Publisher
    British Institute of Radiology
    Type
    Article
    Article Version
    Scholarly/refereed, publisher version
    Metadata
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    Abstract
    Objectives: Diffusion tensor imaging (DTI) is an MRI modality for characterizing the property, microstructural organization and function in tissues such as the brain and spinal cord. Prior to this investigation, DTI had not been adapted for studies of the temporomandibular joint (TMJ) disc.

    Objectives were to test the feasibility of DTI to evaluate the porcine TMJ disc and to use DTI to observe differences in magnitude of anisotropy of water diffusion between TMJ disc regions.

    Methods: Five adult pig TMJs were scanned on a 9.4 Tesla horizontal bore MRI scanner using an inductively coupled surface coil. High-resolution gradient-echo and diffusion-weighted spin-echo based images were obtained. The mean diffusivity and fractional anisotropy (FA) were computed in different regions of the disc. Two observers were calibrated to review the two-dimensional and three-dimensional images. Polarized light microscopy was used as the gold standard for collagen fibre orientation.

    Results: In the sagittal plane, the mean diffusivity was higher in the posterior (1.28±0.10×10−3 mm−2 s−1) and anterior (1.27±0.08×10−3 mm−2 s−1) bands compared with the intermediate zone (0.96±0.01×10−3 mm−2 s−1), and the FA index was also lowest in the intermediate zone. In the coronal plane, the mean diffusivity was higher in the medial (1.42±0.01×10−3 mm−2 s−1) and lateral (1.21±0.12×10−3 mm−2 s−1) aspects than in the centre (1.09±0.08×10−3 mm−2 s−1), and the FA index was also lowest in the centre.

    Conclusions: DTI is a useful method for non-invasively characterizing the structure/property relationships of the porcine TMJ disc.
    Description
    This is the published version. Copyright © 2014 The British Institute of Radiology
    URI
    http://hdl.handle.net/1808/18939
    DOI
    https://doi.org/10.1259/dmfr/19195745
    Collections
    • Bioengineering Scholarly Works [127]
    • Mechanical Engineering Scholarly Works [114]
    Citation
    Benavides, E., M. Bilgen, B. Al-Hafez, T. Alrefae, Y. Wang, and P. Spencer. "High-resolution Magnetic Resonance Imaging and Diffusion Tensor Imaging of the Porcine Temporomandibular Joint Disc." Dentomaxillofacial Radiology 38.3 (2009): 148-55. http://dx.doi.org/10.1259/dmfr/19195745

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    Contact KU ScholarWorks
    785-864-8983
    KU Libraries
    1425 Jayhawk Blvd
    Lawrence, KS 66045
    785-864-8983

    KU Libraries
    1425 Jayhawk Blvd
    Lawrence, KS 66045
    Image Credits
     

     

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