Quantification of Choriocapillaris with Phansalkar Local Thresholding: Pitfalls to Avoid.

ABSTRACT:

Purpose

To demonstrate the proper use of the Phansalkar local thresholding method (Phansalkar method) in choriocapillaris (CC) quantification with optical coherence tomography angiography (OCTA).

Design

Retrospective, observational case series.

Methods

Swept source OCTA imaging was performed using 3×3 mm and 6×6 mm scanning patterns. The CC slab was extracted after semiautomatic segmentation of the retinal pigment epithelium/Bruch membrane complex. Retinal projection artifacts were removed before further analysis, and CC OCTA images from drusen eyes were compensated using a previously published strategy. CC flow deficits (FDs) were segmented with 2 previously published algorithms: the fuzzy C-means approach (FCM method) and the Phansalkar method. With the Phansalkar m

SUBMITTER: Chu Z 

PROVIDER: S-EPMC7214221 | biostudies-literature | 2020 May

REPOSITORIES: biostudies-literature