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Proceedings Paper

Retinal oximetry with a multiaperture camera
Author(s): Paul Lemaillet; Art Lompado; Mohamed Ibrahim; Quan Dong Nguyen; Jessica C. Ramella-Roman
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Paper Abstract

Oxygen saturation measurements in the retina is an essential measurement in monitoring eye health of diabetic patient. In this paper, preliminary result of oxygen saturation measurements for a healthy patient retina is presented. The retinal oximeter used is based on a regular fundus camera to which was added an optimized optical train designed to perform aperture division whereas a filter array help select the requested wavelengths. Hence, nine equivalent wavelength-dependent sub-images are taken in a snapshot which helps minimizing the effects of eye movements. The setup is calibrated by using a set of reflectance calibration phantoms and a lookuptable (LUT) is computed. An inverse model based on the LUT is presented to extract the optical properties of a patient fundus and further estimate the oxygen saturation in a retina vessel.

Paper Details

Date Published: 3 March 2010
PDF: 7 pages
Proc. SPIE 7550, Ophthalmic Technologies XX, 755021 (3 March 2010); doi: 10.1117/12.841980
Show Author Affiliations
Paul Lemaillet, The Catholic Univ. of America (United States)
Art Lompado, Polaris Sensor Technologies, Inc. (United States)
Mohamed Ibrahim, Wilmer Eye Institute, The Johns Hopkins Univ. (United States)
Quan Dong Nguyen, Wilmer Eye Institute, The Johns Hopkins Univ. (United States)
Jessica C. Ramella-Roman, The Catholic Univ. of America (United States)


Published in SPIE Proceedings Vol. 7550:
Ophthalmic Technologies XX
Fabrice Manns; Per G. Söderberg; Arthur Ho, Editor(s)

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