Using the Pathophysiology of Dry AMD to Guide Binarization of the Choriocapillaris on OCTA: A Model.

Abstract:

:Especially since the incorporation of swept laser sources, optical coherence tomography angiography (OCTA) has enabled quantification of choriocapillaris perfusion. A critical step in this process is binarization, which makes angiographic images quantifiable in terms of perfusion metrics. It remains challenging to have confidence that choriocapillaris perfusion metrics reflect the reality of pathophysiologic flow, largely because choice of binarization method can result in significantly different perfusion metric outcomes. This commentary discusses a proof-of-concept case involving comparative assessment of binarization methods for a set of dry age-related macular degeneration OCTA data. One of these methods was deemed preferable based on superior agreement with suspected physiologic and pathophysiologic characteristics, thus demonstrating the principle that, in the absence of gold standards for measurement of choriocapillaris perfusion, the best available approximations of pathophysiology may be used to guide choice of binarization method.

journal_name

Transl Vis Sci Technol

authors

Braun PX,Mehta N,Gendelman I,Alibhai AY,Baumal CR,Duker JS,Waheed NK

doi

10.1167/tvst.9.8.44

subject

Has Abstract

pub_date

2020-07-29 00:00:00

pages

44

issue

8

issn

2164-2591

pii

TVST-19-2065

journal_volume

9

pub_type

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