Oximetry and blood flow in the retina

P. Lemaillet, A. Lompado, D. Duncan, Q. D. Nguyen, J. C. Ramella-Roman

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

We present the development of setup composed of a retinal oximeter and a blood velocimeter implemented on a regular fundus ophthalmoscope. The oximeter part can acquire nine wavelength-dependent sub-images of the patient fundus in a single snapshot. The fundus image is projected on a large format CCD by an array of nine lenses and wavelength selection is provided by a filter array. Higher wavelength images help establishing melanin absorption, which is further extrapolated to shorter wavelength and subtracted from the absorption images. The remaining shorter wavelength subimages are used measure the oxygen saturation in the retina by fitting oxy- and deoxy-hemoglobin absorption curves. The setup was calibrated with optical phantoms of know optical properties. The velocimeter part of the setup relies on following clusters of erythrocytes to assess the velocity of blood.

Original languageEnglish (US)
Title of host publicationIFMBE Proceedings
Pages321-324
Number of pages4
Volume32 IFMBE
DOIs
StatePublished - 2010
Externally publishedYes
Event26th Southern Biomedical Engineering Conference, SBEC 2010 - College Park, MD, United States
Duration: Apr 30 2010May 2 2010

Other

Other26th Southern Biomedical Engineering Conference, SBEC 2010
CountryUnited States
CityCollege Park, MD
Period4/30/105/2/10

Keywords

  • blood flow
  • Oxygen saturation
  • spectroscopy

ASJC Scopus subject areas

  • Biomedical Engineering
  • Bioengineering

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  • Cite this

    Lemaillet, P., Lompado, A., Duncan, D., Nguyen, Q. D., & Ramella-Roman, J. C. (2010). Oximetry and blood flow in the retina. In IFMBE Proceedings (Vol. 32 IFMBE, pp. 321-324) https://doi.org/10.1007/978-3-642-14998-6_82