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8-channel pTx headcoil for 7T

Description

A 7T 8-channel transmit/receive volume head coil was designed, built, and tested. It is capable to produce transmit fields in the human brain of more than 50 µT when exploiting the RF peak power design limits (5kW). This high B1+ efficiency is necessary either for single voxel spectroscopy to reduce chemical shift artifacts or for pTx based feature selective excitation methods. The shielded decoupled loop array coil fits into B0 shim inserts and enables accommodation of optical stimulation equipment.

RF coil specifications

  • 8-channel transmit/receive
  • f=298MHz
  • outer RF shield dimensions: outer diameter 340mm, Length 396 mm
  • inner dimensions: Anterior-Posterior distance 250mm, Left-Right distance 215mm
  • B1+ efficiency: 50µT @ 5kW peak

Contacts

General contact:

Name Email Institution Applications
Frank Seifert frank.seifert@ptb.de Physikalisch-Technische Bundesanstalt (PTB), Berlin, Germany parallel transmission techniques, implant and MR safety
Lukas Winter lukas.winter@ptb.de Physikalisch-Technische Bundesanstalt (PTB), Berlin, Germany parallel transmission techniques, implant and MR safety

Contributors (alphabetical order)

Bernd Ittermann, Ralf Mekle, Harald Pfeiffer, Frank Seifert, Patrick Waxmann, Lukas Winter

Publications

If you find this useful in your work, please cite:

Seifert F., Pfeiffer H., Mekle R., Waxmann P., Ittermann B., "7T 8-channel pTx Head Coil with High B1+ Efficience Optimized for MRS", ISMRM 2016, #3545

Acknowledgment

This work was funded by European Metrology Research Program (EMRP) grant HLT06. The EMRP is jointly funded by the EMRP participating countries within EURAMET and the European Union.

This work has received funding from the European Partnership on Metrology, co-financed by the European Union’s Horizon Europe Research and Innovation Programme and by the Participating States, under grant number 21NRM05 STASIS.

License and Liability

Please check the DISCLAIMER.pdf