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Abstract #2801

High Permittivity Solid Ceramic Resonators for High Field Human MRI

Sebastian A. Aussenhofer1, Andrew Webb1

1Department of Radiology Leiden University Medical Center, CJ Gorter Center for High Field MRI, Leiden, South Holland, Netherlands

A dielectric resonator made from a high permittivity low loss barium strontium titanate has been designed to operate in degenerate quadrature HEM11 modes at 298.1 MHz (7 Tesla). The compact resonator was designed for high resolution imaging of human digits with a high filling factor and patient comfort. New methods of double tuning such a resonator to proton/fluorine are also presented.

Keywords

acquisition adjacent aimed allows alternative analyzer annular apart applications appropriate assembled audience barium bone cartilage central ceramic ceramics channel channels coated coil coils comfort compact concentric conductive configurations constant copper coupled coverage critically cylinder degree degrees delineation denoted design designed designers designs detail diameter dielectric digit digits display double efficient electrically element excellent excite field fine finger fluorine frequency give gradient height hole homogeneity human in vivo individual inductive inductively intrinsic introduced investigate joints layer length loaded loads loops loss lumped made majority maps match matching material materials matrix measured medical milling mode modes network networks operate orthogonal orthogonality outer patient phantom placed plots positioning potential previous produced properties proton providing quadrature radiology radius remain requiring researchers resolution resonator resonators robust saline sample schemes sensitivity shield short silver simple simplicity slices solid south spaced spatial strontium structure tangent target thin throughout titanate towards transverse trap tuned tuning ultrasonic unaffected usually vast view water