Development and characterisation of a ceramic HF-resonator for the MR-tomography.
Future trends in magnetic resonance imaging (MRI) lead to higher magnetic field strengths of the static magnetic fields and as an implication of that to much higher frequencies. Nowadays a common model of a send-receive coil is the birdcage resonator. However it is very difficult to find an optimal L/C-relation for the capacities and inductivities at frequencies above 300 MHz. The idea is to build a completely new send-receive resonator without discrete network elements. The solution presented in this work is the development of a fully ceramic resonator with a high dielectric constant (between 30-100) and a low loss factor (tan delta approximately 10(3)). This approach has shown to produce a stable transversal magnetic field at the desired MR-frequencies above 300 MHz.
Daleiden
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Institut für Biomedizinische Technik, IBT, Universität Karlsruhe (TH), Deutschland. daleiden@gmx.de, mag@ibt.uka.de
Golombeck
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MA
Junge
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Dössel
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D016477:Artifacts; D002516:Ceramics; D004867:Equipment Design; D006801:Humans; D007089:Image Enhancement / Q000295:instrumentation*; D008279:Magnetic Resonance Imaging / Q000295:instrumentation*; D009716:Numerical Analysis, Computer-Assisted; D012984:Software; D014025:Titanium
C009495:titanium dioxide; D014025:Titanium