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Abstract #3327

31 P MRI of human teeth with Nuclear Overhause Effect enhancement

Yi Sun 1 , Djaudat Idiyatullin 2 , Ole Brauckmann 3 , Donald R. Nixdorf 4 , Arno Kentgens 3 , Michael Garwood 2 , and Arend Heerschap 1

1 Radiology, Radboud University Nijmegen Medical Centre, Nijmegen, Gelderland, Netherlands, 2 Center for Magnetic Resonance Research, University of Minnesota, MN, United States, 3 Institute for Molecules and Materials, Radboud University Nijmegen, Gelderland, Netherlands, 4 Department of Diagnostic and Biological Sciences, University of Minnesota, MN, United States

We demonstrate successful 31 P MR imaging of human tooth in a reasonable measurement time by BLAST and SWIFT sequences, clearly showing anatomical features in particular dentin, enamel and pulp regions. In agreement with the 31 P content the enamel shows the highest and dentin the lower intensity. Furthermore we show that a 1 H- 31 P NOE enhancement of up to 20% can be obtained from dentin, but less than 10% from enamel, in agreement with the water/organic material content. These 31 P MR imaging approaches can also be applied to other human mineralized tissue, such as in the diagnosis of osteoporosis.

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