A room temperature 19-channel magnetic field mapping device for cardiac signals

Bison, G.; Castagna, N.; Hofer, A.; Knowles, P.; Schenker, J.-L.; Kasprzak, M.; Saudan, H.; Weis, A.
October 2009
Applied Physics Letters;10/26/2009, Vol. 95 Issue 17, p173701
Academic Journal
We present a multichannel cardiac magnetic field imaging system built in Fribourg from optical double-resonance Cs vapor magnetometers. It consists of 25 individual sensors designed to record magnetic field maps of the beating human heart by simultaneous measurements on a grid of 19 points over the chest. The system is operated as an array of second order gradiometers using sophisticated digitally controlled feedback loops.


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