Enhancement of in vivo 7T magnetic resonance neuroimaging via flexible metasurfaces
Ultra-high-field (≥7T) MRI suffers from poor transmit (B₁⁺) homogeneity, particularly in neuroimaging. This study evaluated paired metasurfaces near the temporal lobes in five healthy volunteers versus dielectric pads and reference scans. Metasurfaces markedly improved SNR across the brain (FLAIR: ~24%, MPRAGE: ~97%) and in the temporal lobes (FLAIR: ~57%, MPRAGE: ~212%), also recovering signal in the cerebellum and neck. Simulations indicated a 23.5% increase in peak SAR compared to reference.
Authors
- Paul S. Jacobs (ORCID: https://orcid.org/0000-0003-3566-4010)
- Mark Ellıott (ORCID: https://orcid.org/0000-0002-7835-0612)
- Neil Wilson
- John Detre
- Ravinder Reddy
- Wyger Brink
Institutions
- University of Pennsylvania (US)
- University of Twente (NL)
Publication Details
- Journal
- npj Imaging
- Published
- 2026-04-16
- DOI
- https://doi.org/10.1038/s44303-026-00162-x
- Primary Topic
- Advanced MRI Techniques and Applications
- Type
- article
- Field-Weighted Citation Impact
- 0.00
Funders
- National Institutes of Health
- National Institute of Biomedical Imaging and Bioengineering