| Zugriffsnummer | 14737 |
| Dokumenttyp | Buchartikel |
| Sprache | Englisch |
| Titel | SQUIDS : biomedical applications |
| Autor(in); Institution |
Koch, Hans; 8.2, Biosignale, PTB-Berlin
|
| Quelle/Jahr | Encyclopedia of materials : science and technology: 9 (2001), 8785 - 8787 |
| Herausgeber(in) |
Buschow, Kurt H. Jürgen
|
| ISBN | 0-08-043152-6 |
| DOI | |
| Verlag | Amsterdam [u.a.]: Elsevier |
| Freie Schlagworte | Gastroenterology ; Peripheral Nerves ; Magnetocardiography (MCG) ; Magnetoencephalography (MEG) ; Biomagnetismus ; SQUIDs |
| Zusammenfassung | A major application of SQUID systems in biomagnetism, a discipline where the faint magnetic fields associated with electrophysiological functions of the heart, brain, nerves, or muscles are detected with the ultrahigh field sensitivity of SQUIDs. Biomedical investigations with magnetic markers or magnetic nanoparticles have also contributed to biomagnetic research. The magnetic fields under investigation in biomagnetism are very weak. Signal amplitudes that are typically measured are in the range 10-9 - 10-14 T in a frequency range from d.c. to 1 kHz. This requires the sensitivity to magnetic fields that only SQUIDs provide. In addition, very efficient methods for suppressing electric and magnetic interference have to be used. This article introduces several typical applications in gastroenterology, peripheral nerves, Magnetoencephalography (MEG) and Magnetocardiography (MCG). |
