ArticleMagnetic resonance in medicine2024
Performance of receive head arrays versus ultimate intrinsic SNR at 7 T and 10.5 T.
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 12 papers.
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12 citing papers in PubMed.
- Design of an 8-Channel Transmit 32-Channel Receive 11.7T Head Coil and Evaluation of SNR Gains.Magnetic resonance in medicine · 2026Article
- Magnetic resonance imaging.Science advances · 2026Review
- A Numerical Alternative to MR Thermometry for Safety Validation of Multi-Channel RF Transmit Coils.Magnetic resonance in medicine · 2026Article
- An Open-Source Software Toolbox for Rapid Radiofrequency Coil Design and Evaluation in MRI.Magnetic resonance in medicine · 2026Article
- 10.5 T In Vivo Head Imaging With Universal RF Shimming.Magnetic 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
- Comparative Assessment of Graglia-Wilton-Peterson and Rao-Wilton-Glisson Basis Functions for Radiofrequency Coil Modeling in Magnetic Resonance Imaging.IEEE journal on multiscale and multiphysics computational techniques · 2026Article
- An Optimization Framework for the Design of Radiofrequency Coils for Magnetic Resonance Imaging.bioRxiv : the preprint server for biology · 2025Article
- A 128-channel receive array with enhanced signal-to-noise ratio performance for 10.5T brain imaging.Magnetic resonance in medicine · 2025Article
- RF coil design strategies for improving SNR at the ultrahigh magnetic field of 10.5T.Magnetic resonance in medicine · 2025Article
- In vivo imaging of the human brain with the Iseult 11.7-T MRI scanner.Nature methods · 2024Article
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13 authors.
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Abstract
purposeWe examined magnetic field dependent SNR gains and ability to capture them with multichannel receive arrays for human head imaging in going from 7 T, the most commonly used ultrahigh magnetic field (UHF) platform at the present, to 10.5 T, which represents the emerging new frontier of >10 T in UHFs.
methodsElectromagnetic (EM) models of 31-channel and 63-channel multichannel arrays built for 10.5 T were developed for 10.5 T and 7 T simulations. A 7 T version of the 63-channel array with an identical coil layout was also built. Array performance was evaluated in the EM model using a phantom mimicking the size and electrical properties of the human head and a digital human head model. Experimental data was obtained at 7 T and 10.5 T with the 63-channel array. Ultimate intrinsic SNR (uiSNR) was calculated for the two field strengths using a voxelized cloud of dipoles enclosing the phantom or the digital human head model as a reference to assess the performance of the two arrays and field depended SNR gains.
resultsuiSNR calculations in both the phantom and the digital human head model demonstrated SNR gains at 10.5 T relative to 7 T of 2.6 centrally, ˜2 at the location corresponding to the edge of the brain, ˜1.4 at the periphery. The EM models demonstrated that, centrally, both arrays captured ˜90% of the uiSNR at 7 T, but only ˜65% at 10.5 T, leading only to ˜2-fold gain in array SNR in going from 7 to 10.5 T. This trend was also observed experimentally with the 63-channel array capturing a larger fraction of the uiSNR at 7 T compared to 10.5 T, although the percentage of uiSNR captured were slightly lower at both field strengths compared to EM simulation results.
conclusionsMajor uiSNR gains are predicted for human head imaging in going from 7 T to 10.5 T, ranging from ˜2-fold at locations corresponding to the edge of the brain to 2.6-fold at the center, corresponding to approximately quadratic increase with the magnetic field. Realistic 31- and 63-channel receive arrays, however, approach the central uiSNR at 7 T, but fail to do so at 10.5 T, suggesting that more coils and/or different type of coils will be needed at 10.5 T and higher magnetic fields.
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