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Abstract #3143

MR imaging of the temporomandibular joint at 7.0 Tesla: a feasibility study using novel high permittivity dielectric pads

Andrei Manoliu 1,2 , Georg Spinner 2 , Michael Wyss 2 , Daniel Nanz 1 , Dominik Ettlin 3 , Luigi M Gallo 3 , and Gustav Andreisek 1

1 Department of Radiology, University Hospital Zurich, Zurich, Switzerland, 2 Institute for Biomedical Engineering, University and ETH Zurich, Zurich, Switzerland, 3 Center for Dental and Oral Medicine and Maxillofacial Surgery, University of Zurich, Zurich, Switzerland

The current study evaluates the use of high-permittivity dielectric pads for imaging the temporomandibular joint (TMJ) at 7T. 12 healthy volunteers were examined at 7T using a 32-channel head coil with and without dielectric pads. For quantitative analysis, B1+ field maps and signal-to-noise-ratio (SNR) maps were calculated. For qualitative analysis, proton density weighted images were assessed. The application of dielectric pads increased local B1+ and SNR, which translated into significantly increased visibility of the TMJ. The presented results demonstrate the feasibility of high-resolution MR-imaging of the TMJ at 7T for the first time.

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