Optimization of Flexible Metasurfaces at 7T and in vivo B1+ Correction Effects
Motivation: Ultra-high field imaging (≥7T) lacks transmit (B1+) field inhomogeneity due to the shortened RF wavelengths, often resulting in poor image quality. Novel metasurface designs have previously been effective at improving image quality at lower field strengths but have not yet been implemented at 7T. Goal(s): To optimize and demonstrate a novel metasurface design for in vivo usage at 7T. Approach: Empirical optimization and phantom testing produced the final design, while image enhancement was assessed via in vivo calf skeletal muscle imaging. Results: The metasurface produced a 126.5% increase in image relative SNR and a 27.6% increase in transmit efficiency. Impact: The work impacts 7T imaging by presenting a novel piece of hardware that can effectively improve image quality. Future work on this project will include further optimization via variable distributed capacitance across the metasurface.
Authors
- Ravi Prakash Reddy Nanga (ORCID: https://orcid.org/0000-0002-3644-5656)
- Ravinder Reddy (ORCID: https://orcid.org/0000-0003-4580-2392)
- Wyger M. Brink (ORCID: https://orcid.org/0000-0001-9974-7662)
- Ryan Armbruster (ORCID: https://orcid.org/0000-0003-0469-8816)
- John A. Detre (ORCID: https://orcid.org/0000-0002-8115-6343)
- Anshuman Swain (ORCID: https://orcid.org/0000-0002-0257-8610)
- Paul S. Jacobs (ORCID: https://orcid.org/0000-0003-3566-4010)
- Mark Ellıott (ORCID: https://orcid.org/0000-0002-7835-0612)
- M. Dylan Tisdall (ORCID: https://orcid.org/0000-0002-0454-3112)
- Aniketh Hanumapur
- Neil Wilson (ORCID: https://orcid.org/0009-0002-7766-2929)
Publication Details
- Journal
- Proceedings on CD-ROM - International Society for Magnetic Resonance in Medicine. Scientific Meeting and Exhibition/Proceedings of the International Society for Magnetic Resonance in Medicine, Scientific Meeting and Exhibition
- Published
- 2024-11-26
- DOI
- https://doi.org/10.58530/2024/1221
- Primary Topic
- Tissue Engineering and Regenerative Medicine
- Type
- article
- Field-Weighted Citation Impact
- 0.00