Accurate, quantitative assessment of retinal blood oxygen saturation (sO2) may provide a useful early indicator of pathophysiology in several ocular diseases. Here, with visible-light optical coherence tomography (OCT), we demonstrate an automated spectroscopic retinal oximetry algorithm to measure the sO2 within the retinal arteries (A-sO2) and veins (V-sO2) in rats by automatically detecting the vascular posterior boundary on crosssectional structural OCT. The algorithm was validated in vitro with flow phantoms and in vivo in rats by comparing the sO2 results, respectively, to those obtained using a blood gas analyzer and pulse oximetry. We also investigated the response of oxygen extraction (A-V sO2), including inter-session reproducibility, at different inhaled oxygen concentrations.
- Functional monitoring and imaging
- Image enhancement
- Optical coherence tomography
ASJC Scopus subject areas
- Atomic and Molecular Physics, and Optics