Roki Viidik1,2,
Simon Bergstrand3, Tomas Karlsson3, Gran Starck2,4
1Department of Signals and Systems,
Chalmers University of Technology, Gteborg, Sweden; 2Department
of Medical Physics and Biomedical Engineering, Sahlgrenska University
Hospital, Gteborg, Sweden; 3Institute of Neuroscience and
Physiology, Sahlgrenska University Hospital, Gteborg, Sweden; 4Department
for Radiation Physics, University of Gothenburg, Gteborg, Sweden
Physiological
registrations simultaneously with MR scanning usually require the removal of
a huge gradient switching artefact from the weak physiological signal. We
investigated a concept with pickup coils for simultaneous gradient switching
registration for artefact removal. Adapted combinations of three reference
signals recorded at the rear of the magnet could minimize the gradient
artefact in all signal recordings at different positions in front of the
magnet. The presented method works with any pulse sequence and any position
and geometry of electrode leads loop.