ArticleMagnetic resonance in medicine2022
Magnetic field strength dependent SNR gain at the center of a spherical phantom and up to 11.7T.
Article in Magnetic resonance in medicine, 2022. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 41 papers.
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41 citing papers in PubMed.
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- A Numerical Alternative to MR Thermometry for Safety Validation of Multi-Channel RF Transmit Coils.Magnetic resonance in medicine · 2026Article
- Motion- and Field-Robust Mesoscopic Whole-BrainMagnetic resonance in medicine · 2026Article
- Bridging the gap with invasive imaging: promises and challenges of a new generation of ultrahigh resolution fMRI.bioRxiv : the preprint server for biology · 2026Article
- Ultimate Intrinsic SNR in the Torso of Realistic Body Models.Magnetic resonance in medicine · 2026Article
- BOLD fMRI at 9.4T with 3D stack-of-spirals readouts.Magma (New York, N.Y.) · 2026Article
- Advancing whole-brain BOLD functional MRI in humans at 10.5 T with motion-robust 3D echo-planar imaging, parallel transmission, and high-density radiofrequency receive coils.Magnetic resonance in medicine · 2026Article
- Human fMRI at 11.7T: Assessing feasibility, stability, and reliability on the Iseult scanner.Imaging neuroscience (Cambridge, Mass.) · 2026Article
- Diffusion-weighted steady-state free precession imaging in the ex vivo macaque brain on a 10.5T human MRI scanner.bioRxiv : the preprint server for biology · 2025Article
- High-Resolution Brain Metabolic Imaging at Ultrahigh Field Using Extended Spatiospectral Encoding and Subspace Modeling.IEEE transactions on bio-medical engineering · 2025Article
- Easy-to-useMagnetic resonance in medicine · 2025Article
- Cerebellar imaging for neuroscience at 9.4 T.Magnetic resonance in medicine · 2025Article
- Multi-center benchmarking of cervical spinal cord RF coils for 7 T MRI: A traveling spines study.Magnetic resonance in medicine · 2025Article
- InterleavedMagnetic resonance in medicine · 2025Article
- A 128-channel receive array with enhanced signal-to-noise ratio performance for 10.5T brain imaging.Magnetic resonance in medicine · 2025Article
- 500 MHz Inductive Birdcage RF Coil for Brain MRI: Design, Implementation and Validation.IEEE transactions on bio-medical engineering · 2025Article
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11 authors.
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Abstract
purposeThe SNR at the center of a spherical phantom of known electrical properties was measured in quasi-identical experimental conditions as a function of magnetic field strength between 3 T and 11.7 T.
methodsThe SNR was measured at the center of a spherical water saline phantom with a gradient-recalled echo sequence. Measurements were performed at NeuroSpin at 3, 7, and 11.7 T. The phantom was then shipped to Maastricht University and then to the University of Minnesota for additional data points at 7, 9.4, and 10.5 T. Experiments were carried out with the exact same type of birdcage volume coil (except at 3 T, where a similar coil was used) to attempt at isolating the evolution of SNR with field strength alone. Phantom electrical properties were characterized over the corresponding frequency range.
resultsElectrical properties were found to barely vary over the frequency range. Removing the influence of the flip-angle excitation inhomogeneity was crucial, as expected. After such correction, measurements revealed a gain of SNR growing as B
conclusionsBy using quasi-identical experimental setups (RF volume coil, phantom, electrical properties, and protocol), this work reports experimental data between 3 T and 11.7 T, enabling the comparison with SNR theories in which conductivity and permittivity can be assumed to be constant with respect to field strength. According to ultimate SNR theory, these results can be reasonably extrapolated to the performance of receive arrays with greater than about 32 elements for central SNR in the same spherical phantom.
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