ArticleMagnetic resonance in medicine2024
Universal modes: Calibration-free time-interleaved acquisition of modes.
Article in Magnetic resonance in medicine, 2024. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 6 papers.
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Who cites it
6 citing papers in PubMed.
- Signal and Contrast Optimization With Predicted Excitations (SCOPE) for Accelerating Large FOV Body Imaging at UHF.Magnetic resonance in medicine · 2026Article
- 10.5 T In Vivo Head Imaging With Universal RF Shimming.Magnetic resonance in medicine · 2026Article
- First In VivoMagnetic resonance in medicine · 2026Article
- A shielded 32-channel body transceiver array with integrated electronics for 7 T.Magnetic resonance in medicine · 2025Article
- Exploring in vivo human brain metabolism at 10.5 T: Initial insights from MR spectroscopic imaging.NeuroImage · 2025Article
- Accelerated 3D multi-channelMagnetic resonance in medicine · 2024Article
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Authors and funding
3 authors.
Funding
Abstract
purposeTo introduce universal modes by applying the universal pulse concept to time-interleaved acquisition of modes (TIAMO), thereby achieving calibration-free
methodsTwo databases of different RF arrays were used to demonstrate the feasibility of universal modes. The first comprised 31 cardiac in vivo data sets acquired at 7T while the second consisted of 6 simulated 10.5T pelvic data sets. Subject-specific solutions and universal modes were computed and subsequently evaluated alongside predefined default modes. For the cardiac database, subdivision into subpopulations was investigated. The optimization was performed using least-squares (LS) TIAMO and acquisition modes optimized for refocused echoes (AMORE). Finally, universal modes based on simulated pelvis data were applied in vivo at 10.5T.
resultsIn all studied cases, the universal modes yield improvements over the predefined default modes of up to 51% (cardiac) and 30% (pelvic) in terms of median excitation error when using two modes. The subpopulation-specific cardiac solutions revealed a further improvement of universal modes at the expense of increased errors when applied outside the appropriate subpopulation. Direct application of simulation-based universal modes in vivo resulted in up to a 14% reduction in excitation error compared to default modes and up to a 34% reduction in peak 10 g local specific absorption rate (SAR) compared to subject-specific solutions.
conclusionsUniversal modes are feasible for calibration-free
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