PhD project by Frodi Gregersen

Name: Frodi Gregersen
Project Title: Mapping of current-induced magnetic fields in the human brain using ultrahigh field magnetic resonance imaging
Group: MRI acquisition
Supervisors: Lars G Hanson, Axel Thielscher and Rong Xue (Cas, Beijing)

Project Description: 
The main aim of the project is to improve robustness and sensitivity of magnetic resonance current density imaging (MRCDI). MRCDI uses weak electrical currents injected via surface electrodes to the subject’s brain. The magnetic fields created by the current flow in the brain can be measured with an MR scanner. Currently, MRCDI methods are very sensitive to subject motion and physiological noise. We aim to improve robustness by using faster imaging methods, which allow for physiological noise correction and assessment of subject motion.

Robust and accurate mapping of the current-induced magnetic fields can be used to obtain subject specific tissue conductivities. This is necessary for individualized computational head models used in neuroscientific research. Accurate simulations of electric and magnetic fields is important for source localization in electro- and magneto-encephalography (EEG and MEG) and for target localization and dose control in brain stimulation techniques such as transcranial electrical stimulation (TES) and transcranial magnetic stimulation (TMS).


Frodi Gregersen
DTU Sundhedsteknologi


Lars G. Hanson
Gruppeleder, Lektor
DTU Sundhedsteknologi
45 25 36 86


Axel Thielscher
Sektionsleder, Professor
DTU Sundhedsteknologi
45 25 53 13