The Iseult/Inumac Whole Body 11.7 T MRI Magnet R&amp;D Program

Schild, T.; Maksoud, W. Abdel; Aubert, G.; Belorgey, J.; Bermond, S.; Berriaud, Christophe; Brédy, P.; Chesny, Ph.; Donati, A.; Dubois, Olivier; Gilgrass, G.; Guillard, J. C.; Hervieu, B.; Juster, F.P.; Lannou, H.; Mayri, C.; Meuris, C.; Molinié, F.; Nunio, F.; Quettier, L.; Scola, L.; Sinanna, A.; Tellier, Olivier; Védrine, P.

doi:10.1109/tasc.2010.2040149

Cited by 25 publications

(14 citation statements)

References 11 publications

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“…The reduced operating temperature is achieved using a pump running continuously on the helium reservoir (Warner 2008). As a part of the French- n/a n/a n/a n/a German research project Iseult/INUMAC the design and manufacture of an actively shielded 11.7 T with a 90 cm bore is advancing (Vedrine et al 2008 and references therein; Schild et al 2010). The magnet system will be built by CEA/Dapnia/Irfu.…”

Section: T Mri Magnetsmentioning

confidence: 99%

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High-Field Superconducting Magnets

Liebel

2011

Medical Radiology

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Section: T Mri Magnetsmentioning

confidence: 99%

“…The main coil is built up from an arrangement of modules of double pancake windings. This configuration allows direct contact of the superconductor with super fluid helium (T = 1.8 K) and thus the system benefits from cryostabilization (Vedrine et al 2008;Schild et al 2010). …”

Section: T Mri Magnetsmentioning

confidence: 99%

High-Field Superconducting Magnets

Liebel

2011

Medical Radiology

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“…Use of filtering components, e.g. like that used by the 11.7 tesla Iseult circuit [22] may help alleviate cost increase from the high quality power supply.…”

Section: Conductor Requirements Challenges and Opportunitiesmentioning

confidence: 99%

“…With the pancake approach, one can see a potential of coil topology switching from the traditional 8-coil multi-coil design to multiple pancakes or pancake blocks. In order to deliver required homogeneity, such pancakes/blocks would be strategically distributed axially, spaced apart and separated by spacers that support inter-pancake forces [22], [29]. …”

Section: Conductor Requirements Challenges and Opportunitiesmentioning

confidence: 99%

Conductors for commercial MRI magnets beyond NbTi: requirements and challenges

Parizh

Lvovsky

Sumption

2016

Supercond. Sci. Technol.

116

107

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Magnetic Resonance Imaging (MRI), a powerful medical diagnostic tool, is the largest commercial application of superconductivity. The superconducting magnet is the largest and most expensive component of an MRI system. The magnet configuration is determined by competing requirements including optimized functional performance, patient comfort, ease of siting in a hospital environment, minimum acquisition and lifecycle cost including service. In this paper, we analyze conductor requirements for commercial MRI magnets beyond traditional NbTi conductors, while avoiding links to a particular magnet configuration or design decisions. Potential conductor candidates include MgB2, ReBCO and BSCCO options. The analysis shows that no MRI-ready non-NbTi conductor is commercially available at the moment. For some conductors, MRI specifications will be difficult to achieve in principle. For others, cost is a key barrier. In some cases, the prospects for developing an MRI-ready conductor are more favorable, but significant developments are still needed. The key needs include the development of, or significant improvements in: (a) conductors specifically designed for MRI applications, with form-fit-and-function readily integratable into the present MRI magnet technology with minimum modifications. Preferably, similar conductors should be available from multiple vendors; (b) conductors with improved quench characteristics, i.e. the ability to carry significant current without damage while in the resistive state; (c) insulation which is compatible with manufacturing and refrigeration technologies; (d) dramatic increases in production and long-length quality control, including large-volume conductor manufacturing technology. In-situ MgB2 is, perhaps, the closest to meeting commercial and technical requirements to become suitable for commercial MRI. Conductor technology is an important, but not the only, issue in introduction of HTS / MgB2 conductor into commercial MRI magnets. These new conductors, even when they meet the above requirements, will likely require numerous modifications and developments in the associated magnet technology.

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“…The system is designed to operate in non-persistent mode in a bath of superfluid LHe, which is serviced by a separate cryogenic facility forming an integral part of the installation. The design and supporting R&D were completed in 2013 [2], [3] and the project is now in the realisation phase.…”

Section: Introductionmentioning

confidence: 99%

Iseult/INUMAC Whole Body 11.7 T MRI Magnet

Védrine¹,

Gilgrass²,

Aubert³

et al. 2015

IEEE Trans. Appl. Supercond.

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A new innovative Whole Body 11.7 T MRI magnet is currently being manufactured at Alstom Belfort as part of the Iseult/Inumac project, a French-German initiative focused on very high magnetic-field molecular imaging. It will be installed in 2015 in a neuroscience research center with other very high field MRI equipment, operating in France at CEA Saclay since November 2006. This actively shielded magnet system, manufactured from NbTi superconductor, will generate a homogeneous field level of 11.75 T within a 90 cm warm bore, and will operate at a current of 1483 A, in driven mode, in a bath of superfluid LHe at 1.8K. The stored energy is 338 MJ and the inductance 308 H. The cryostat has external dimensions of 5 m in diameter and 5.2 m in length, for a total weight of the magnet of 132 tons. Before the start of the magnet manufacturing, developments made on prototypes have confirmed a specific set of design and manufacturing options including the conductor choice and the proposed cryogenic and electrical schemes. The main coil is wound as double pancakes laterally wetted by HeII. The magnet is serviced by a separate cryogenic and electrical facility forming an integral part of the installation. The developments and the magnet manufacturing have been supervised by an independent Magnet Advisory Committee. Full-scale serial production of the 170 double pancakes which form the main coil package has been finished by Alstom. The main coil is being assembled and the cryostating of the magnet should be finished by the middle of 2015. Full tests and commissioning of the magnet at 1.8K at Neurospin are expected in 2015.Index Terms-Magnetic resonance imaging (MRI), niobium titanium, superconducting magnet.

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The Iseult/Inumac Whole Body 11.7 T MRI Magnet R&D Program

Cited by 25 publications

References 11 publications

High-Field Superconducting Magnets

High-Field Superconducting Magnets

Conductors for commercial MRI magnets beyond NbTi: requirements and challenges

Iseult/INUMAC Whole Body 11.7 T MRI Magnet

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