Abstract: A magnetoencephalography (MEG) apparatus comprising a helmet shaped and configured to fit a range of human head sizes and/or shapes, the helmet comprising a plurality of openings disposed in predetermined locations around the helmet, each opening being adapted to receive a magnetoencephalography field sensor in an arrangement such that the magnetoencephalography field sensor is moveable in a direction towards or away from a human head inside the helmet

Abstract: A method of designing a magnetic shield comprising a structure enclosing a space, the structure comprising passive magnetic shielding material and a winding configured to produce a specified magnetic within the structure when current is passed through the winding, is disclosed. The method comprises determining an optimised configuration of the winding accounting for the presence of the passive magnetic shield material by implementing one or more boundary conditions at the surface of the passive magnetic shielding material.