Dual Layered Models of Light Scattering in the Near Infrared A: Optical Measurements and Simulation

Rand K. Almajidy, Klaas Rackebrandt, Hartmut Gehring, Ulrich G. Hofmann

Abstract

Intralipid emulsion is often used as optical model substance to mimick living tissue's strong scattering properties. As such it is of considerable importance to utilize realistic parameters for any type of simulation or calculation in context of Near Infrared Spectroscopy. We determined optical properties of diluted Intralipid solutions at often used, realistic volume concentrations ρil and at two NIRS wavelengths (780nm and 850nm) in a double integrating Ulbricht-sphere setup. The results were used in Monte Carlo (MC) simulations of an experiment, described in our companion paper. Both, phantom experiments and MC simulation showed qualitatively similar results and demonstrated the effects of changing the three major NIRS factors, namely the penetrated layer depth (d), the Intralipid concentration ρil and the source-detector separation (SDS). The results demonstrated that light reaching the detectors was inversely proportional to ρil and d. It also showed that very low Intralipid concentrations do not follow the optical properties documented for Intralipid 20%.

Original languageEnglish
Title of host publication2019 41st Annual International Conference of the IEEE Engineering in Medicine and Biology Society (EMBC)
Number of pages5
PublisherIEEE
Publication date07.2019
Pages4770-4774
Article number8857449
ISBN (Print)978-1-5386-1312-2
ISBN (Electronic)978-1-5386-1311-5
DOIs
Publication statusPublished - 07.2019
Event2019 41th Annual International Conference of the IEEE Engineering in Medicine and Biology Society
- Berlin, Germany
Duration: 23.07.201927.07.2019

Research Areas and Centers

  • Research Area: Center for Population Medicine and Public Health (ZBV)

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