| Zugriffsnummer | 19888 |
| Dokumenttyp | Konferenzartikel |
| Sprache | Englisch |
| Titel | Mapping of human heart beat dynamics by atomic magnetometers |
| Autor(in); Institution |
Weis, Antoine; University of Fribourg, Physics Department, Fribourg, SWITZERLAND
Bison, Georg; University of Fribourg, Physics Department, Fribourg, SWITZERLAND
Wynands, Robert; 4.4, Zeit und Frequenz, PTB-Braunschweig
|
| Quelle/Jahr | Atomic physics 19 : XIX International Conference on Atomic Physics, ICAP 2004:(2005), 373 - 380 |
| Schriftenreihe | AIP conference proceedings: 770 |
| Herausgeber(in) |
Marcassa, Luis Gustavo
|
| ISBN | 0-7354-0255-8 |
| Verlag | Melville, NY: American Institute of Physics |
| Konferenzangaben | 19th International Conference on Atomic Physics, Rio de Janeiro, 25-30, July, 2004, Brazil |
| Klassifikationscode | PACS: 07.55.Ge ; PACS: 42.62.Be ; PACS: 33.40.+f |
| Freie Schlagworte | Instrumentation ; Measurement ; Metrology ; Medical optics instrumentation |
| Zusammenfassung | Stimulated by recent progress in laser-based optical magnetometry and in developments of powerful signal denoising techniques we initiated the development of a lowcost laser-driven optically pumped magnetometer (OPM) for biomagnetic applications. The OPM uses optically pumped cesium atoms in glass cells of a few cm3. Its sensitivity (<70 fT in 1 Hz bandwidth), bandwidth (140 Hz), and spatial resolution (cm) were optimized for the two-dimensional mapping of the magnetic field produced above the chest by the beating human heart. Signal averaging using an electrocardiographic signal as a reference and gradiometric detection reduces residual noise significantly so that the dynamic of the heart field can be displayed a movie. We discuss the principle of the technique and give a status report on ongoing work towards the development of a multichannel device. |
