Monitoring system for investigating the effect of temperature change on optical properties

Ercan Kara*, İnci Çilesiz, Murat Gülsoy

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

6 Citations (Scopus)


Knowledge about the changes in optical properties is needed for planning safer and more accurate laser treatments. A monitoring system was developed to study how the optical properties of a lipid emulsion are affected by temperature changes. A double-integrating-sphere system is modified with a controlled heating apparatus to measure the temperature-dependent diffuse reflectance and total transmittance values. The absorption and reduced scattering coefficients were estimated from the reflectance and transmittance values using an inverse adding-doubling method. The total transmittance showed positive correlation with temperature while the diffuse reflectance was found to be negatively correlated. Although the absorption coefficient did not demonstrate a statistically significant change with temperature, the reduced scattering coefficient was negatively correlated. By using the obtained optical properties, Monte Carlo simulations were performed to observe the difference in light propagation within a tissue. The results indicate that temperature-dependent changes in optical properties should be taken into consideration for a safer laser treatment.

Original languageEnglish
Pages (from-to)1763-1768
Number of pages6
JournalLasers in Medical Science
Issue number8
Publication statusPublished - 1 Nov 2018

Bibliographical note

Publisher Copyright:
© 2018, Springer-Verlag London Ltd., part of Springer Nature.


  • Double-integrating-sphere setup
  • Monte Carlo simulations
  • Optical property
  • Temperature effect


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