title: Magnetocardiography measurements with4He vector optically pumped magnetometers at room temperature.
abstract: In this paper, we present a proof of concept study which demonstrates for the first time the possibility of recording magnetocardiography (MCG) signals with4He 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 a zero magnetic field. Sensors are operated at room temperature and provide a tri-axis vector measurement of the magnetic field. Measured sensitivity is around 210 f T (√Hz)-1in 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 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.
authors.affiliation: CEA, LETI, MINATEC Campus, F-38054 Grenoble, France.
authors.forename: S
authors.initials: S
authors.lastname: Morales
authors.forename: M C
authors.initials: MC
authors.lastname: Corsi
authors.forename: W
authors.initials: W
authors.lastname: Fourcault
authors.forename: F
authors.initials: F
authors.lastname: Bertrand
authors.forename: G
authors.initials: G
authors.lastname: Cauffet
authors.forename: C
authors.initials: C
authors.lastname: Gobbo
authors.forename: F
authors.initials: F
authors.lastname: Alcouffe
authors.forename: F
authors.initials: F
authors.lastname: Lenouvel
authors.forename: M
authors.initials: M
authors.lastname: Le Prado
authors.forename: F
authors.initials: F
authors.lastname: Berger
authors.forename: G
authors.initials: G
authors.lastname: Vanzetto
authors.forename: E
authors.initials: E
authors.lastname: Labyt
mesh_terms: D006339:Heart Rate; D006371:Helium; D006801:Humans; D053798:Magnetocardiography / Q000295:instrumentation*; D055620:Optical Phenomena; D013696:Temperature
chemical_list: D006371:Helium