HIGH RESOLUTION HADAMARD TRANSFORM OXIMETRY |
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| D. Barschdorff, E. Starke |
- Abstract:
- The principle of pulse oximetry is based on the different absorption of haemoglobin at various wavelengths in the visible and IR-region, utilizing Lambert- Beers law. With conventional oximeters a part of the human body is penetrated by radiation at two wavelengths and the oxygen saturation is calculated from the detected signals. Intention of the optical set-up presented here is the improvement of the signal-to-noise-ratio of the detected signals by a modified signal generation. Radiation of three different sources penetrates the human skin in a time-multiplex sequence, which is designated by a Hadamard matrix. The signals of the distinct radiation sources are obtained mathematically from the detected sum signals. The optical set-up exemplifies the principle, which can be transferred to other blood ingredients than haemoglobin when the emitting wavelengths of the radiation sources are changed.
- Keywords:
- NIR-Spectroscopy, pulse oximetry, hadamard transformation
- Download:
- IMEKO-WC-2000-TC13-P329.pdf
- DOI:
- -
- Event details
- Event name:
- XVI IMEKO World Congress
- Title:
Measurement - Supports Science - Improves Technology - Protects Environment ... and Provides Employment - Now and in the Future
- Place:
- Vienna, AUSTRIA
- Time:
- 25 September 2000 - 28 September 2000