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Abstract #5007

Enhancing B₁⁺ Field Homogeneity in 7T MRI Using Metasurfaces: Balancing Image Quality and Safety

Pradnya Narvekar1, Paul Jacobs1, and Ravinder Reddy1
1Center for Advanced Metabolic Imaging in Precision Medicine, Department of Radiology, University of Pennsylvania, Philadelphia, PA, United States

Synopsis

Keywords: In Silico, In Silico

Motivation: This study is motivated by the need to improve B₁⁺ field uniformity and image quality in 7T MRI while ensuring patient safety.

Goal(s): The study aims to explore whether metasurfaces can enhance B₁⁺ field uniformity and signal strength in 7T while balancing improvements in image quality with safety constraints.

Approach: The study employs electromagnetic simulations with metasurfaces positioned around the head during MRI scans to assess improvements in B₁⁺ field uniformity, alongside SAR measurements for safety evaluation.

Results: The study achieved an increase in B₁⁺ field strength and improvement in field uniformity, confirming the efficacy of metasurfaces in enhancing 7T MRI image quality.

Impact: This study's findings could lead to improved MRI diagnostics. It opens new avenues for investigating metasurface optimization and safety protocols, ultimately advancing high-field MRI applications and patient outcomes in neuroimaging.

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