Abstract Magneto- and electroencephalography (MEG/EEG) are important techniques for the diagnosis and pre-surgical evaluation of epilepsy. Yet. in current cryogen-based MEG systems the sensors are offset from the scalp. which limits the signal-to-noise ratio (SNR) and thereby the sensitivity to activity from deep structures such as the hippocampus. https://jalyttlers.shop/product-category/ring/