Meeting Banner
Abstract #2316

Safety evaluation with respect to RF-induced heating of a new setup for Transcranial Electric Stimulation during MRI

Fróði Gregersen1,2,3,4, Cihan Göksu2,5, Gregor Schaefers6,7, Rong Xue4,8,9, Axel Thielscher1,2, and Lars Hanson1,2
1Section for Magnetic Resonance, DTU Health Tech, Technical University of Denmark, Kgs Lyngby, Denmark, 2Danish Research Centre for Magnetic Resonance, Centre for Functional and Diagnostic Imaging and Research, Copenhagen University Hospital, Amager and Hvidovre, Denmark, 3Sino-Danish Center for Education and Research, Aarhus, Denmark, 4University of Chinese Academic of Sciences, Beijing, China, 5High-Field Magnetic Resonance Center, Max-Planck-Institute for Biological Cybernetic, Tübingen, Germany, 6MRI-STaR-Magnetic Resonance Institute for Safety, Technology and Research GmbH, Gelsenkirchen, Germany, 7MR:comp GmbH, MR Safety Testing Laboratory, Gelsenkirchen, Germany, 8State Key Laboratory of Brain and Cognitive Science, Beijing MRI Center for Brain Research, Institute of Biophysics, Chinese Academy of Sciences, Beijing, China, 9Beijing Institute for Brain Disorders, Beijing, China

Combining transcranial electrical stimulation (TES) with MRI offers various interesting research opportunities, but also introduces safety concerns. Coupling between the RF field and highly conductive TES leads can lead to skin burns. These safety issues are usually mitigated with the use of safety resistors and controlled lead paths that reduce the power absorbed by the leads. However, these methods introduce practical limitations for combined TES/MRI experiments, such as limited stimulation currents and cable stray fields corrupting MR current density imaging. We overcome these limitations by using low-conductivity silicone-rubber as TES leads. Simulations and temperature measurements are used for safety assessment.

This abstract and the presentation materials are available to members only; a login is required.

Join Here