Magnetocardiography measurements with 4He vector optically pumped magnetometers at room temperature

S Morales, M C Corsi, W Fourcault, F Bertrand, G Cauffet, C Gobbo, F Alcouffe, F Lenouvel, M Le Prado, F Berger, G Vanzetto, E Labyt
2017 Physics in Medicine and Biology  
In this paper, we present a proof of concept study which demonstrates for the first time the possibility to record magnetocardiography (MCG) signals with 4 He vector optically-pumped magnetometers (OPM) operated in a gradiometer mode. Resulting from a compromise between sensitivity, size and operability in a clinical environment, the developed magnetometers are based on the parametric resonance of helium in zero magnetic field. Sensors are operated at room-temperature and provide a tri-axis
more » ... or measurement of the magnetic field. Measured sensitivity is around 210 fT/√Hz in the bandwidth [2 Hz; 300 Hz]. MCG signals from a phantom and two healthy subjects are successfully recorded. Human MCG data obtained with the OPMs are compared to reference electrocardiogram (ECG) recordings: similar heart rates, shapes of the main patterns of the cardiac cycle (P/T waves, QRS complex) and QRS widths are obtained with both techniques.
doi:10.1088/1361-6560/aa6459 pmid:28257003 fatcat:sg6v6utshrbozdcy42fgpll4xu