A New Instrument for Continuous Measurement of Tissue Blood Flow by Light Beating Spectroscopy
| Autor: | Gert Nilsson, T. Tenland, P. Ake Oberg |
|---|---|
| Rok vydání: | 1980 |
| Předmět: |
Optics and Photonics
Materials science Noise (signal processing) business.industry Lasers Spectrum Analysis Quantitative Biology::Tissues and Organs Detector Models Cardiovascular Biomedical Engineering Photodetector Doppler Effect Blood flow Laser Doppler velocimetry Signal Optics Interference (communication) Regional Blood Flow Humans Rheology Spectroscopy business Skin |
| Zdroj: | IEEE Transactions on Biomedical Engineering. :12-19 |
| ISSN: | 0018-9294 |
| DOI: | 10.1109/tbme.1980.326686 |
| Popis: | A new instrument for measurement of regional tissue blood flow based on the laser Doppler principle is reported. The theoretical background of light beating spectroscopy is discussed and a detection technique which makes possible the suppression of the adverse effects of laser-mode interference and wide-band beam amplitude noise is described. Instead of using a single square-law photodetector a differential detector technique is introduced that reduces common-mode noise to a negligible level, without influencing the blood flow related signal. The new instrument has proved to be highly stable and sensitive. Continuous recordings of tissue blood flow can be performed in the laboratory as well as at the bedside. |
| Databáze: | OpenAIRE |
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