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Abstract #4249

Embedding Dynamic Field Probes in 7T RF Array Coils Enables Concurrent Field Monitoring Without Degrading Coil Performance

Sydney Nicole Williams1, Christian Mirkes2, Paul McElhinney3, Belinda Ding4, Simon Gross2, Kerrin J. Pine5, Roland Müller6, Nikolaus Weiskopf5,7,8, Harald E. Möller6,7, and Shajan Gunamony1,3
1Imaging Centre of Excellence, University of Glasgow, Glasgow, United Kingdom, 2Skope Magnetic Resonance Technologies AG, Zurich, Switzerland, 3MR CoilTech, Ltd., Glasgow, United Kingdom, 4Siemens Healthcare Ltd., Camberley, United Kingdom, 5Department of Neurophysics, Max Planck Institute for Human Cognitive and Brain Sciences, Leipzig, Germany, 6NMR Methods & Development Group, Max Planck Institute for Human Cognitive and Brain Sciences, Leipzig, Germany, 7Felix Bloch Institute for Solid State Physics, Leipzig University, Leipzig, Germany, 8Wellcome Centre for Human Neuroimaging, Institute of Neurology, University College London, London, United Kingdom

Synopsis

Keywords: RF Arrays & Systems, System Imperfections: Measurement & Correction

Motivation: To understand the effects of incorporating dynamic field probes in RF coils for imaging at ultra-high fields.

Goal(s): To characterize transmit, receive, and temperature behavior of a 16Tx/64Rx coil with and without field probes.

Approach: Electromagnetic coil simulations of B1+ and temperature maps were performed with and without probes in phantoms and compared to experimental data. Additionally, the receive array with and without probes was studied experimentally with SNR mapping.

Results: Field probes do not diminish coil performance, opening the door for advanced 7T MRI that mitigates static and RF field inhomogeneity with integrated RF coils.

Impact: Incorporating dynamic field probes in parallel-transmit RF coils with high receive channel counts can help mitigate increased B1+ and B0 at ultra-high fields. We explore the effects on RF coils with integrated probes by evaluating performance with and without probes.

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Abstract

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