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Abstract #0936

Dental MRI can detect micro-cracks

Djaudat Idiyatullin 1 , Michael Garwood 1 , and Donald Nixdorf 2

1 CMRR, Radiology Department, University of Minnesota, Minneapolis, Minneaota, United States, 2 Division of TMD & Orofacial Pain and Department of Neurology, University of Minnesota, Minneapolis, Minneaota, United States

This work demonstrates that dental MRI using SWIFT identifies cracks of about 20 μm thickness and larger, which is one order of magnitude smaller than the image voxel, within the dentin of teeth. To explain this phenomenon, a dental digital MRI model based on known 1H relaxation parameters in dental tissues is proposed. The comparison of simulated and experimental data helps to understand the mechanisms of contrast observed in SWIFT images of cracked teeth. The similarity of dentin and cortical bone allows the generalization of the proposed model for studies other bone pathologies.

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