Micron-scale circuits (green) will be designed to adhere to brain cells and convert neural voltage signals into magnetic fields detectable by imaging

Noninvasive imaging-based electrophysiology using microelectronic devices

Image shows microscopic circuits that will enable monitoring of the brain's electrical activity using magnetic imaging techniques such as magnetic resonance imaging (MRI). Following injection into brains, the microdevices (shown in green) will convert neuronal voltage signals into tiny magnetic fields (shown in dashed blue lines) that will be detectable by MRI.