Magnetic Resonance Encephalography Reconstruction with Magnetic Field Monitoring

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

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.