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An active transmit/receive NMR magnetometer for field monitoring in ultra high field MRI scanners

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Eschelbach,  M
Department High-Field Magnetic Resonance, Max Planck Institute for Biological Cybernetics, Max Planck Society;
Max Planck Institute for Biological Cybernetics, Max Planck Society;

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Scheffler,  K
Max Planck Institute for Biological Cybernetics, Max Planck Society;
Department High-Field Magnetic Resonance, Max Planck Institute for Biological Cybernetics, Max Planck Society;

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Citation

Handwerker, J., Bonehi, V., Eschelbach, M., Scheffler, K., Ortmanns, M., & Anders, J. (2013). An active transmit/receive NMR magnetometer for field monitoring in ultra high field MRI scanners. Talk presented at Dreiländertagung der Deutschen, Schweizerischen und Österreichischen Gesellschaft für Biomedizinische Technik (BMT 2013). Graz, Austria. 2013-09-19 - 2013-09-21.


Cite as: http://hdl.handle.net/21.11116/0000-0001-4EE7-4
Abstract
We present a miniaturized active nuclear magnetic resonance (NMR) magnetometer consisting of a susceptibility matched field probe and a PCB based RF transceiver. Thanks to its transmit-receive (TX/RX) capabilities, the system can be used to monitor the spatio-temporal field evolution during a magnetic resonance imaging (MRI) scan and thereby allows for a correction of gradient field imperfections to improve image quality. The magnetometer can be tuned for magnetic fields ranging from 7 T to 15.5 T and achieves a resolution of 14.8 nT measured in a 9.4 T whole body scanner.