J. Belorgey

Measurements of the gradient-induced power deposition in the He-bath of the Iseult 11.7T magnet and comparison with theory

Nicolas Boulant, Quentin Guihard, Olivier Dubois, Hervé Lannou et autres

Motivation: Experimental characterization and understanding of the power deposition in the He bath of an ultra-high field magnet is important for magnet safety. Goal(s): We report a quasi-analytical model for the Z gradient axis power deposition and compare it with measurements. Approach: …

Impact of third order shim coils on gradient-magnet interactions and gradient waveform fidelity

Nicolas Boulant, Caroline Le Ster, Alexis Amadon, Guy Aubert et autres

Motivation: Third order shim coils can impact gradient-magnet interactions with consequences on image quality and magnet safety. Goal(s): To demonstrate the influence of third order shim coils on the SC72 gradient coil using field and vibration measurements. Approach: The gradient transfer function …

Power deposition in the He bath induced by the Z gradient coil in the 11.7 T Iseult magnet: theory versus measurements

Guy Aubert, Quentin Guihard, Olivier Dubois, Hervé Lannou et autres

Abstract Gradient-magnet interactions increase with higher field magnets and stronger gradient coils. Perhaps the most sensitive aspect is magnet quench, which can be induced by a loss of superconductivity of the main coil caused by a rise of the temperature of the …

fr (code pays fourni par la source)

The possible influence of third-order shim coils on gradient–magnet interactions: an inter-field and inter-site study

Nicolas Boulant, Caroline Le Ster, Alexis Amadon, Guy Aubert et autres

OBJECTIVE: To assess the possible influence of third-order shim coils on the behavior of the gradient field and in gradient-magnet interactions at 7 T and above. MATERIALS AND METHODS: Gradient impulse response function measurements were performed at 5 sites spanning field strengths …

fr, us, de, ca, ch (code pays fourni par la source)

Progress on the commissioning of the Iseult 11.7T whole-body MRI: first images

Jerome Allard, Alexis Amadon, Guy Aubert, J. Belorgey et autres

The Iseult project started in 2001 and is a collaborative effort involving CEA and the University of Freiburg in academics, Guerbet, Siemens Healthineers and Bruker Biospin as industrial partners. One central aspect of the project has been the design by CEA of …

fr, de (code pays fourni par la source)

Overview of the Iseult 11.7 T MRI Cryoplant Operation

Hervé Lannou, J. Belorgey, Cédric Bonnelye, P. Brédy et autres

The Iseult whole-body MRI delivered its first images in October 2021. The masterpiece of this MRI is an actively shielded NbTi magnet providing a homogeneous magnetic field of 11.7 T within a 90 cm warm bore. A dedicated cryoplant was constructed to …

fr (code pays fourni par la source)

Progress Toward Medical Use of the Iseult Whole Body 11.7 T MRI: First Images

L. Quettier, Guy Aubert, Alexis Amadon, J. Belorgey et autres

Neurospin is a neuroscience research center located in France at the Atomic Energy Commission (CEA Saclay). The facility is hosting an innovative whole-body 11.7 T MRI system that has delivered its first images in October 2021. The core part of the Iseult …

fr (code pays fourni par la source)

Commissioning of the Iseult CEA 11.7 T whole-body MRI: current status, gradient–magnet interaction tests and first imaging experience

Nicolas Boulant, L. Quettier, Guy Aubert, Alexis Amadon et autres

OBJECTIVES: The Iseult MRI is an actively shielded whole-body magnet providing a homogeneous and stable magnetic field of 11.7 T. After nearly 20 years of research and development, the magnet successfully reached its target field strength for the first time in 2019. …

fr (code pays fourni par la source)

CEA Contribution to the PIP-II Linear Accelerator

Nicolas Bazin, J. Belorgey, S. D. Berry, Quentin Bertrand et autres

The Proton Improvement Plan II (PIP-II) that will be installed at Fermilab is the first U.S. accelerator project that will have significant contributions from international partners. CEA joined the international collaboration in 2018 and will deliver 10 low-beta cryomodules as In-Kind Contributions …

fr (code pays fourni par la source)

CEA Contribution to the PIP-II Linear Accelerator

Nicolas Bazin, Sergey Arsenyev, J. Belorgey, S. D. Berry et autres

The Proton Improvement Plan II (PIP-II) that will be installed at Fermilab is the first U.S. accelerator project that will have significant contributions from international partners. CEA joined the international collaboration in 2018, and will deliver 10 low-beta cryomodules as In-Kind Contribution …

fr, us (code pays fourni par la source)

Commissioning Completion of the Iseult Whole Body 11.7 T MRI System

L. Quettier, Guy Aubert, J. Belorgey, Christophe Paul Berriaud et autres

The Iseult project is a French-German initiative focused on very high magnetic-field molecular imaging. The project includes a Whole Body 11.7 T MRI magnet installed at Neurospin, a neuroscience research center operating at CEA Saclay since November 2006. After 7 years of …

fr, gb (code pays fourni par la source)

Manufacturing Completion of the Iseult Whole Body 11.7 T MRI System

L. Quettier, Guy Aubert, J. Belorgey, Christophe Paul Berriaud et autres

The Iseult/Inumac project is a French–German initiative focused on very high magnetic-field molecular imaging. That project includes a Whole Body 11.7 T MRI magnet that will equip Neurospin, a neuroscience research center operating at CEA Saclay since November 2006. After seven years …

fr, gb (code pays fourni par la source)