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Optical properties ...
Optical properties of human whole blood - Changes due to slow heating
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Nilsson, Annika, 1969 (författare)
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Lucassen, G. W (författare)
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Verkmysse, W (författare)
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- Andersson-Engels, Stefan (författare)
- Lund University,Lunds universitet,Atomfysik,Fysiska institutionen,Institutioner vid LTH,Lunds Tekniska Högskola,Atomic Physics,Department of Physics,Departments at LTH,Faculty of Engineering, LTH
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van Gemert, Martin .j. C. (författare)
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Albrecht, HJ (redaktör/utgivare)
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Delacretaz, GP (redaktör/utgivare)
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Meier, TH (redaktör/utgivare)
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Steiner, RW (redaktör/utgivare)
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Svaasand, LO (redaktör/utgivare)
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Katzir, A (redaktör/utgivare)
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vanGemert, M. J. C. (författare)
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(creator_code:org_t)
- ISBN 0819423254
- SPIE, 1996
- 1996
- Engelska.
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Ingår i: LASER-TISSUE INTERACTION AND TISSUE OPTICS II, PROCEEDINGS OF. - : SPIE. - 0819423254 ; 2923, s. 24-34
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Abstract
Ämnesord
Stäng
- Optical properties of human whole blood were measured in vitro, at 633 nm with a double integrating sphere set-up, The blood was kept at constant flow through a flow cell while slowly heating the blood from approximately 25 degrees C to 55 degrees C in a heat exchanger, The results show a small but distinct decrease in the g-factor of 1.7 +/- 0.6\% and a similar increase in the scattering coefficient, mu(s), of 2.9 +/- 0.6\% at approximately 45-46 degrees C. When studying the thermal effect on the blood cells under a white-light transmission microscope, the changes in the scattering properties could be correlated to a sudden change in the shape of the red blood cells, from disc-shaped to spherical, at approximately the same temperature. Furthermore, a continuous manifest increase in the absorption coefficient, mu(a), was seen with temperature rise, on average 83.8 +/- 68.1\% when reaching the temperature 50 degrees C. This might be due to heat-induced haemolysis of the red blood cells, resulting in free light absorbing haemoglobin in the surrounding plasma and thus higher effective light absorption.
Ämnesord
- NATURVETENSKAP -- Fysik -- Atom- och molekylfysik och optik (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences -- Atom and Molecular Physics and Optics (hsv//eng)
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Till lärosätets databas
- Av författaren/redakt...
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Nilsson, Annika, ...
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Lucassen, G. W
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Verkmysse, W
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Andersson-Engels ...
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van Gemert, Mart ...
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Albrecht, HJ
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visa fler...
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Delacretaz, GP
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Meier, TH
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Steiner, RW
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Svaasand, LO
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Katzir, A
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vanGemert, M. J. ...
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visa färre...
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- NATURVETENSKAP
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LASER-TISSUE INT ...
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Lunds universitet
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