A combined method to quantify the retinal metabolic rate of oxygen using photoacoustic ophthalmoscopy and optical coherence tomography.

Abstract:

:Quantitatively determining physiological parameters at a microscopic level in the retina furthers the understanding of the molecular pathways of blinding diseases, such as diabetic retinopathy and glaucoma. An essential parameter, which has yet to be quantified noninvasively, is the retinal oxygen metabolic rate (rMRO2). Quantifying rMRO2 is challenging because two parameters, the blood flow rate and hemoglobin oxygen saturation (sO2), must be measured together. We combined photoacoustic ophthalmoscopy (PAOM) with spectral domain-optical coherence tomography (SD-OCT) to tackle this challenge, in which PAOM measured the sO2 and SD-OCT mapped the blood flow rate. We tested the integrated system on normal wild-type rats, in which the measured rMRO2 was 297.86 ± 70.23 nl/minute. This quantitative method may shed new light on both fundamental research and clinical care in ophthalmology in the future.

journal_name

Sci Rep

journal_title

Scientific reports

authors

Song W,Wei Q,Liu W,Liu T,Yi J,Sheibani N,Fawzi AA,Linsenmeier RA,Jiao S,Zhang HF

doi

10.1038/srep06525

subject

Has Abstract

pub_date

2014-10-06 00:00:00

pages

6525

issn

2045-2322

pii

srep06525

journal_volume

4

pub_type

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