Meeting Banner
Abstract #3107

Reference Coils Signal Combinations Removes Gradient Switching Artefacts in Physiological Recordings During MRI

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.