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Meeting Abstract

Individual voxel models for head SAR estimation

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

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

External Resource

https://www.ismrm.org/24/docs/24ToC.pdf
(Abstract)

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Citation

Gabel, F., Solomakha, G., Bosch, D., Glang, F., Avdievich, N., Scheffler, K., et al. (2024). Individual voxel models for head SAR estimation. In ISMRM & ISMRT Annual Meeting & Exhibition 2024 (pp. 443).


Cite as: https://hdl.handle.net/21.11116/0000-000F-3990-E
Abstract
Motivation: Accurate human tissue models for simulation of RF power absorption are a key safety requirement for transmit coil development especially at ultra-high field. Goal(s): To create individual voxel models of the human head and torso. Approach: A pipeline for head and torso segmentation was developed based on a 3T multi-contrast protocol and tailored post-processing. The resulting voxel models were used for electromagnetic simulation of a self-developed Tx array at 9.4T. Results: Strong agreement was found between measured and simulated B maps using the generated voxel model. Simulated worst-case SAR distributions differed significantly between individual and ‘off-the-shelf’ voxel models. Impact: We present a pipeline for the creation of individual human tissue voxel models covering head and torso, which is based on multi-contrast MR image segmentation. This meets a central need in safety-related simulations of ultra-high field RF coil arrays.