Combined caLculation of Ultra-high field Biases (CLUB) with Sandwich: fast, simultaneous estimation of 3D B0 and multi-channel B1+ maps for 7T MRI
Motivation: More efficient mapping of magnetic field inhomogeneities (B0 and B1+) is essential in ultra-high field MRI for individually optimizing parallel transmission pulses. Goal(s): To rapidly, simultaneously, and accurately estimate B0 and B1+ inhomogeneities at 7T. Approach: We propose a modification of the 3D B1+ mapping Sandwich sequence (CLUB-Sandwich), which integrates three monopolar echoes for ΔB0 mapping in the pre-saturation train. The CLUB-Sandwich approach is validated by comparing the estimated ΔB0 and B1+ maps to standard reference methods in five subjects. Results: Minimal differences (mean bias of 0.9$$$\,$$$±$$$\,$$$4.5 Hz and 3.2$$$\,$$$±$$$\,$$$1.1°) demonstrate reliable, fast mapping of ultra-high field inhomogeneities. Impact: The proposed CLUB-Sandwich sequence enables rapid, simultaneous ΔB0 and B1+ mapping at 7T without accuracy reduction, providing a faster method for optimizing parallel transmission pulses, increasing efficiency in ultra-high field MRI applications.
Authors
- Tom Hilbert (ORCID: https://orcid.org/0000-0001-8207-4908)
- Aaron T. Hess (ORCID: https://orcid.org/0000-0002-9289-5619)
- Patrick Alexander Liebig (ORCID: https://orcid.org/0000-0001-7342-3715)
- Dominik M. Nickel (ORCID: https://orcid.org/0000-0002-0360-7233)
- Robin Martin Heidemann (ORCID: https://orcid.org/0000-0001-7556-7405)
- Bénédicte Maréchal (ORCID: https://orcid.org/0000-0001-7866-2854)
- Gian Franco Piredda (ORCID: https://orcid.org/0000-0002-8449-6634)
- Jocelyn Philippe (ORCID: https://orcid.org/0009-0009-5952-6107)
- Tommaso Di Noto (ORCID: https://orcid.org/0000-0002-5161-055X)
- Jürgen Herrler (ORCID: https://orcid.org/0000-0002-4620-8216)
- Thomas Yu (ORCID: https://orcid.org/0000-0002-5841-0198)
- James B. Kent (ORCID: https://orcid.org/0009-0006-3364-9924)
- Antoine Klauser (ORCID: https://orcid.org/0000-0003-3019-9914)
- Tobias Kober (ORCID: https://orcid.org/0000-0001-7598-9456)
- Emilie Sleight (ORCID: https://orcid.org/0000-0003-0034-4578)
- Lina Bacha
- Natalia Pato Montemayor (ORCID: https://orcid.org/0009-0006-7212-1970)
- Jean-Philippe Tiran
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
- 2025-09-16
- DOI
- https://doi.org/10.58530/2025/3365
- Primary Topic
- Advanced MRI Techniques and Applications
- Type
- article
- Field-Weighted Citation Impact
- 0.00