Non-invasive skin oxygenation imaging using a multi-spectral imaging system, effectiveness of different concentration algorithms applied on human skin

J. H.G.M. Klaessens, H. J. Noordmans, R. De Roode, R. M. Verdaasdonk

Research output: Chapter in Book/Report/Conference proceedingConference contributionAcademicpeer-review

3 Citations (Scopus)

Abstract

This study describes noninvasive noncontact methods to acquire and analyze functional information from the skin. Multispectral images at several selected wavelengths in the visible and near infrared region are collected and used in mathematical methods to calculate concentrations of different chromophores in the dermis of the skin. The method is based on the continuous wave Near Infrared Spectroscopy. Concentration changes of hemoglobin (dO2Hb, dHHb and dtHb) can be calculated from light attenuations using the modified Lambert Beer equation. We applied this technique on multi-spectral images taken from the skin surface using different algorithms for calculating changes in O2Hb, HHb and tHb. In clinical settings, the imaging of local oxygenation variations and/or blood perfusion in the skin can be useful for e.g. detection of skin cancer, detection of early inflammation, checking the level of peripheral nerve block anesthesia, study of wound healing and tissue viability by skin flap transplantations. Images from the skin are obtained with a multi-spectral imaging system consisting of a CCD camera in combination with a Liquid Crystal Tunable Filter (420 - 730 nm). The skin is illuminated with either a broad band light source or a tunable multi wavelength LED light source. The algorithms were validated during skin oxygen saturation changes induced by temporary arm clamping and applied to some clinical examples. The initial results with the multispectral skin imaging system show good results for detecting dynamic changes in oxygen concentration. However, the optimal algorithm needs to be determined.

Original languageEnglish
Title of host publicationWorld Congress on Medical Physics and Biomedical Engineering
Subtitle of host publicationDiagnostic Imaging
Pages725-728
Number of pages4
Edition2
DOIs
Publication statusPublished - 1 Dec 2009
Externally publishedYes
EventWorld Congress on Medical Physics and Biomedical Engineering 2009 - ICM, Munich, Germany
Duration: 7 Sep 200912 Sep 2009

Publication series

NameIFMBE Proceedings
Number2
Volume25
ISSN (Print)1680-0737

Conference

ConferenceWorld Congress on Medical Physics and Biomedical Engineering 2009
CountryGermany
CityMunich
Period7/09/0912/09/09

Keywords

  • Methods
  • Near infrared
  • Oxygenation
  • Skin
  • Spectroscopy

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