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NeuroSpin clinical platform

11.7T Clinical MRI


Leader: Cécile Lerman
(contact : cecile.lerman@cea.fr)

Published on 3 August 2017

1) Ambitious scientific objectives


  • ​Visualize the human brain at a spatial resolution never reached before: « mesoscopic scale » (~100 microns).
  • Discover new contrasts.
  • Explore the potential of molecular imaging at very high sensitivity. 


2) Unique characteristics


  • Magnet operating in non-persisting mode for a better temporal stability,
  • Main coil composed of individual coils using a « double pancake » design for a better spatial homogeneity, 
  • Two active shielding coils, 
  • Magnetic field: 11.75 T,
  • Stored energy: 338 MJ,
  • Current: 1483 A,
  • Inductance: 308 H,
  • Cryostat length: 5 m,
  • External diameter: 5.2 m,
  • Internal diameter of the magnet tunnel: 90 cm,
  • Weight: 132 tons.
First magnet in the world with these magnetic field, internal diameter and technology!

3) Multiple technical challenges


Machine performing the winding of the « double pancake » coils.  All the « double pancake » coils have been wound individually (one side and then the other side). Autumn 2013. « Double pancake » coil on a test platform.  Autumn 2013. Storage of the « double pancakes ». Individual characteristics (Autumn 2013):
- External diameter: 1,9
- Internal diameter: 1 m
- Number of conductor turns per pancake: 88.


Main coil assembly. Spring 2014. Active shielding coil on a test platform. Characteristics of these two coils (Autumn 2013):
- External diameter: 4,3 m
- Conductor length: 24.7 km
- Number of conductor layers: 36
- Conductor weight: about 8tons. 



View of the magnet after the completion of the main coil assembly and the addition of the first active shielding co​il.