| Zugriffsnummer | 11334 |
| Dokumenttyp | Konferenzartikel |
| Peer Review | unbekannt |
| Sprache | Deutsch |
| Titel | Bestimmung von wellenlängenabhängigen Lichtlaufzeiten durch Finger |
| Autor(in); Institution |
Wabnitz, Heidrun; 8.12, Biomedizinische Optik und NMR-Messtechnik, PTB-Berlin
Grosenick, Dirk; 8.12, Biomedizinische Optik und NMR-Messtechnik, PTB-Berlin
Rinneberg, Herbert; 8, Medizinphysik und metrologische Informationstechnik, PTB-Berlin
|
| Quelle/Jahr | Pulsoximeter : messtechnische Prüfung von Medizinprodukten mit Messfunktion (4) ; Vorträge des 142. PTB-Seminars:(1999), 52 - 59 |
| Schriftenreihe | PTB-Bericht PTB-MM-9 |
| Herausgeber(in) |
Wabnitz, Heidrun; 8.12, Biomedizinische Optik und NMR-Messtechnik, PTB-Berlin
Klein, Karl-Dittmar; 8.12, Biomedizinische Optik und NMR-Messtechnik, PTB-Berlin
|
| ISSN | 0947-5737 |
| ISBN | 3-89701-442-4 |
| Berichtsnummer | PTB-MM-9 |
| Verlag | Bremerhaven: Wirtschaftsverl. NW |
| Konferenzangaben | 142. PTB-Seminar: Pulsoximetrie - Stand und Entwicklung, Berlin, 9, Juni, 1998, Germany |
| Freie Schlagworte | pulse oximetry ; near infrared spectroscopy ; photon propagation in tissue |
| Zusammenfassung | By using the differential pathlength factor (DPF) the Beer-Lambert law can be modified to determine concentration changes of chromophores in biological tissue despite the strong scattering of light in tissue. In particular, this approach is important for multi-wavelength pulse oximetry which aims at measuring the relative concentrations of several hemoglobin derivatives in arterial blood. In order to determine the DPF, distributions of times of flight of photons through fingers of 15 volunteers were measured at 12 wavelengths between 630 nm and 830 nm using picosecond laser pulses and a time-correlated single photon counting system. In this wavelength range DPF values between 5.2 at 830 nm and 6.1 at 680 nm were found. In addition, from measured distributions of times of flight the reduced scattering coefficient and the absorption coefficient were determined at each wavelength. |
| Rechteinformation | 1999, Physikalisch-Technische Bundesanstalt |