SAR safety procedure for self-built pTx human head RF array coils at 9.4T

Glang, F; Bosch, D; Solomakha, G; Bause, J; Avdievich, NI; Scheffler, K

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SAR safety procedure for self-built pTx human head RF array coils at 9.4T

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Glang, F
Department High-Field Magnetic Resonance, Max Planck Institute for Biological Cybernetics, Max Planck Society;

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Bosch, D
Department High-Field Magnetic Resonance, Max Planck Institute for Biological Cybernetics, Max Planck Society;

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Solomakha, G
Department High-Field Magnetic Resonance, Max Planck Institute for Biological Cybernetics, Max Planck Society;

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Bause, J
Department High-Field Magnetic Resonance, Max Planck Institute for Biological Cybernetics, Max Planck Society;

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Avdievich, NI
Department High-Field Magnetic Resonance, Max Planck Institute for Biological Cybernetics, Max Planck Society;

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

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https://www.ismrm.org/24/docs/24ToC.pdf
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引用

Glang, F., Bosch, D., Solomakha, G., Bause, J., Avdievich, N., & Scheffler, K. (2024). SAR safety procedure for self-built pTx human head RF array coils at 9.4T. Poster presented at ISMRM & ISMRT Annual Meeting & Exhibition 2024, Singapore.

引用: https://hdl.handle.net/21.11116/0000-000F-3986-A

要旨

Motivation: Ensuring subject safety, in particular to limit tissue heating, is a critical aspect of self-developed pTx RF array coils for UHF applications. Goal(s): Establishing a dependable workflow for accurate simulation, data processing and realization of online supervision of power deposition. Approach: The workflow relies on cross-comparisons of EM simulation results and intermediate processing steps based on representative excitation modes, and on comparison of measured and simulated field maps. Results: Consistency was achieved in all cross-comparison steps. Residual discrepancies between measured and simulated B maps require further investigation, but their safety implications can be addressed by an appropriate safety factor. Impact: A reliable workflow for EM simulation, subsequent data processing, and realization of online SAR monitoring for home-built RF human head array coils at 9.4T is presented. This is an essential building block to ensure subject safety in experimental UHF studies.