The DOI matches its Crossref record; 27 of the 27 references it cites were found in a registry or an index.
Magnetic field modeling with a set of individual localized coils
Open accessAbstract
A set of generic, circular individual coils is shown to be capable of generating highly complex magnetic field distributions in a flexible fashion. Arbitrarily oriented linear field gradients can be generated in three-dimensional as well as sliced volumes at amplitudes that allow imaging applications. The multi-coil approach permits the simultaneous generation of linear MRI encoding fields and complex shim fields by the same setup, thereby reducing system complexity. The choice of the sensitive volume over which the magnetic fields are optimized remains temporally and spatially variable at all times. The restriction of the field synthesis to experimentally relevant, smaller volumes such as single slices directly translates into improved efficiency, i.e. higher magnetic field amplitudes and/or reduced coil currents. For applications like arterial spin labeling, signal spoiling and diffusion weighting, perfect linearity of the gradient fields is not required and reduced demands on accuracy can also be readily translated into improved efficiency. The first experimental realization was achieved for mouse head MRI with 24 coils that were mounted on the surface of a cylindrical former. Oblique linear field gradients of 20 kHz/cm (47 mT/m) were generated with a maximum current of 1.4A which allowed radial imaging of a mouse head. The potential of the new approach for generating arbitrary magnetic field shapes is demonstrated by synthesizing the more complex, higher order spherical harmonic magnetic field distributions X2-Y2, Z2 and Z2X. The new multi-coil approach provides the framework for the integration of conventional imaging and shim coils into a single multi-coil system in which shape, strength, accuracy and spatial coverage of the magnetic field can be specifically optimized for the application at hand.
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Flagged first, then by citations
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- C. Juchem, D.L. Rothman, R.A. de Graaf, First-to-fourth Order Spherical Harmonics Shimming with a Grid of Circular Electrical Coils, ISMRM, Annual Meeting, Honolulu, HI/USA, 2009, pp. 3081.
- C. Juchem, T.W. Nixon, M. Abildgaard, S. McIntyre, D.L. Rothman, R.A. de Graaf, Whole Brain Field Homogenization with Localized Electrical Coils, ISMRM, Annual Meeting, Honolulu, HI/USA, 2009, pp. 3079.
Cited by
Sorted by citations
Dynamic multi-coil shimming of the human brain at 7T
Juchem, C., Nixon, T. W., McIntyre, S., Boer, V. O., Rothman, D. L., & de Graaf, R. A. (2011) · Journal of Magnetic Resonance · doi:10.1016/j.jmr.2011.07.005 · Cited by 151
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Juchem, C., Umesh Rudrapatna, S., Nixon, T. W., & de Graaf, R. A. (2015) · NeuroImage · doi:10.1016/j.neuroimage.2014.11.011 · Cited by 74
Self-citationNaturalistic Hyperscanning with Wearable Magnetoencephalography
Holmes, N., Rea, M., Hill, R. M., Boto, E., Leggett, J., Edwards, L. J., Rhodes, N., Shah, V., Osborne, J., Fromhold, T. M., et al. (2023) · Sensors · doi:10.3390/s23125454 · Cited by 52
“Superposition of the magnetic field generated by multiple coils, each carrying an independently controllable current, enables the production of arbitrary patterns of magnetic field variation within a selected target volume (Garda and Galias, 2014; Juchem et al., 2010).”
Background
Metadata
- Authors
- Juchem, C., Nixon, T. W., McIntyre, S., Rothman, D. L., & Graaf, R. A. D.
- Affiliations
- Yale University (US)
- Corresponding author
- Juchem, Christoph
- Venue
- Journal of Magnetic Resonance
- Publisher
- Elsevier BV
- Published
- 2010-06
- Volume
- 204
- Issue
- 2
- Pages
- 281-289
- ISSN
- 1090-7807 (ISSN-L)
- PMC
- PMC2884296
- OpenAlex
- W2056310784
- Cited by
- 91
- References
- 27
- Citations by year
- 2026: 2 · 2025: 6 · 2024: 6 · 2023: 6 · 2022: 11 · 2021: 6 · 2020: 2 · 2019: 8 · 2018: 4 · 2017: 7 · 2016: 2 · 2015: 5 · 2014: 7 · 2013: 5 · 2012: 7
- FWCI
- 4.94
- Type
- journal article
- Language
- en
- Open access
- green
- www.ncbi.nlm.nih.gov
- Licence
- Locations
- Journal of Magnetic Resonance (publishedVersion)
- PubMed (publishedVersion)
- PubMed Central (acceptedVersion)
- Funders
- National Institutes of Health
- National Cancer Institute (R33CA118503, R21CA118503, R21/R33-CA118503)
- National Institute of Neurological Disorders and Stroke (P30NS052519)
- National Institute of Biomedical Imaging and Bioengineering (R01EB000473)
- Topics
- Health Sciences › Medicine › Radiology, Nuclear Medicine and Imaging › Advanced MRI Techniques and Applications
- Physical Sciences › Physics and Astronomy › Atomic and Molecular Physics, and Optics › Atomic and Subatomic Physics Research
- Physical Sciences › Engineering › Electrical and Electronic Engineering › Superconducting Materials and Applications
- Keywords
- arterial spin labeling
- MeSH terms
- Computer Simulation, Electromagnetic Fields, Equipment Design, Magnetic Resonance Imaging, Magnetics, Models, Theoretical, Transducers, Computer-Aided Design, Equipment Failure Analysis
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