Low-Field Rampable Magnet for a High-Resolution MRI System

@article{Rigla2020LowFieldRM,
  title={Low-Field Rampable Magnet for a High-Resolution MRI System},
  author={J. Rigla and J. Algar{\'i}n and Alfonso R{\'i}os and J. Benlloch and J. Alonso and F. B{\o}dker and A. Anari and Eduardo Pall{\'a}s and Daniel Grau and G. Puchalt and J. M. Gonzalez and Miguel Corber{\'a}n and E. D{\'i}az},
  journal={IEEE Transactions on Magnetics},
  year={2020},
  volume={56},
  pages={1-7}
}
This article presents the design and experimental characterization of an electromagnet rampable up to 1 T and tailored to meet the demands of a magnetic resonance imaging (MRI) system conceived for spatial resolutions at the level of tens of microns. For high image quality, MRI requires a homogeneous magnetic field over the field of view (FoV) where the sample is imaged. We have opted for passive shimming based on optimal pole profiling and measure a relative field inhomogeneity of 71 parts per… Expand
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References

SHOWING 1-10 OF 31 REFERENCES
Theory of gradient coil design methods for magnetic resonance imaging
The process to produce an MR image includes nuclear alignment, RF excitation, spatial encoding, and image formation. In simple terms, an magnetic resonance imaging (MRI) system consists of five majorExpand
Structural Design of a 9.4 T Whole-Body MRI Superconducting Magnet
A project to develop a 9.4 T magnetic resonance imaging system is proposed for bioscience research applications. A whole body superconducting magnet system will be manufactured and test in theExpand
New horizons in MR technology: RF coil designs and trends.
  • H. Fujita
  • Medicine
  • Magnetic resonance in medical sciences : MRMS : an official journal of Japan Society of Magnetic Resonance in Medicine
  • 2007
TLDR
The paper explores the important and fundamental principles of RF array coils for MR imaging and reviews cutting-edge array coils, including those for transmit-SENSE or parallel transmission applications and the future of radiofrequency (RF) coil technology is also considered. Expand
Novel technologies and configurations of superconducting magnets for MRI
TLDR
A review of non-traditional approaches and emerging trends in superconducting magnets for MRI is presented, including the largest 11.7?T Iseult magnet, and advanced cryogenics approaches with an emphasis on low-volume helium systems, including hermetically sealed self-contained cryostats requiring no user intervention, are presented. Expand
Multi-Coil Shimming System for an Electropermanent Magnet MRI System
RESULTS A multichannel system based on an array of 10 planar coils has been chosen to design the shimming system. This system is composed by two PCBs each containing 5 Planar Coils (see Fig.1b)Expand
9.4T human MRI: Preliminary results
TLDR
The preliminary results demonstrate the feasibility of safe and successful human imaging at 9.4T, and facilitated compensation for RF artifacts attributed to destructive interference patterns, in order to achieve homogeneous 9. Expand
Role of very high order and degree B0 shimming for spectroscopic imaging of the human brain at 7 tesla
TLDR
In a 10 mm thick slice taken through the region of the subcortical nuclei, it is found that in comparison to 1st–2nd degree shims, use of1st–3rd and 1st-4th degree shimming reduces σB  0Global by 29% and 55%, respectively. Expand
Ultimate intrinsic signal‐to‐noise ratio in MRI
TLDR
It was found that the ultimate intrinsic SNR increases better than linearly with the main magnetic field up to 10 T for the model used, and it was observed that for field strengths of 4 T or higher, focusing is required to reach the ultimate intrinsically SNR. Expand
Multislice 1H MRSI of the human brain at 7 T using dynamic B0 and B1 shimming
Proton MR spectroscopic imaging of the human brain at ultra‐high field (≥7 T) is challenging due to increased radio frequency power deposition, increased magnetic field B0 inhomogeneity, andExpand
A review of MR physics: 3T versus 1.5T.
TLDR
Changes in the underlying physics concepts related to increasing the main magnetic field from 1.5T to 3T are illustrated, and an overall understanding of the benefits and constraints of signal-to-noise ratio and contrast- to-Noise ratio changes between 1. Expand
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