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Abstract #0215

Magnetic Resonance Encephalography Reconstruction with Magnetic Field Monitoring

SUMMA25Frederik Testud1, Jakob Asslnder1, Christoph Barmet2, Thimo Hugger1, Benjamin Zahneisen1, Klaas Prssmann2, Jrgen Hennig1, Maxim Zaitsev1

1Medical Physics, University Medical Center Freiburg, Freiburg, Germany; 2Biomedical Engineering, University & ETH Zrich, Zrich, Switzerland

In the last years field probes have been used for dynamic magnetic field monitoring in order to reduce image artifacts due to imperfect gradient coils and amplifiers, eddy currents, B0 drifts and patient breathing by taking the measured field dynamics into account in the image reconstruction. Long Magnetic Resonance Encephalography experiments suffer from B0 and gradient drifts. These can be corrected for by interleaved measurement of the k-space trajectory and the imaging experiment. This is performed in the present work with 4 </sub>1H field probes combined with 28 channels of a 95 channel head coil.