title: A four-channel SQUID magnetometer for brain research.
abstract: A 4-channel differential SQUID magnetometer has been built. Its design principles and construction are described. Proper matching of the detection coil to the SQUID input is discussed. Examples of auditory, dental pain and visual evoked response data are presented.
mesh_terms: D004569:Electroencephalography / Q000295:instrumentation*; D008280:Magnetics