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

摘要

We present a multichannel cardiac magnetic field imaging system built inFribourg from optical double-resonance Cs vapor magnetometers. It consists of25 individual sensors designed to record magnetic field maps of the beatinghuman heart by simultaneous measurements on a grid of 19 points over the chest.The system is operated as an array of second order gradiometers usingsophisticated digitally controlled feedback loops.