Magnetocardiography measurements with 4He vector optically pumped magnetometers at room temperature
| Description | |
| Date | |
| Authors | Morales S., Corsi M.C., Fourcault W., Bertrand F., Cauffet G., Gobbo C., Alcouffe F., Lenouvel F., Le Prado M., Berger F., Vanzetto G., Labyt E. |
| Year | 2017-0414 |
| Source-Title | Physics in Medicine and Biology |
| Affiliations | CEA, LETI, MINATEC Campus, Grenoble, France, University of Grenoble Alpes, G2Elab, Grenoble, France, CNRS, G2Elab, Grenoble, France, Department of Cardiology, University Hospital, Grenoble, France, INSERM U1039, Bioclinic Radiopharmaceutics Laboratory, Grenoble, France |
| Abstract | In this paper, we present a proof of concept study which demonstrates for the first time the possibility of recording magnetocardiography (MCG) signals with 4He 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)-1 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 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. © 2017 Institute of Physics and Engineering in Medicine. |
| Author-Keywords | helium, magnetocardiography (MCG), optically pumped magnetometers (OPM) |
| Index-Keywords | Helium, Magnetic fields, Magnetostatics, Clinical environments, Electrocardiogram recordings, Healthy subjects, Optically pumped, Parametric resonance, Proof of concept, Vector measurements, Zero magnetic fields, Magnetometers |
| ISSN | 319155 |
| Link | Link |