Electrical impedance tomography (EIT) is a non-harmful, noninvasive, and relatively inexpensive medical imaging technique capable of imaging conductivity distributions on a millisecond timescale. Due to low signal-to-noise ratios, EIT has been shown to successfully image neural activity in the outer third of the rat brain with subdural electrodes. 

My research is looking into combining EIT injection with magnetic field measurements using optically pumped magnetometers (OPMs). This could theoretically replace the need for subdural electrodes, replacing them with scalp electrodes and an array of OPMs. The end goal is to develop an easily wearable and usable system to image fast neural activity in the human brain, something which does not yet exist.