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Fig. 1 | Alzheimer's Research & Therapy

Fig. 1

From: Potential ocular indicators to distinguish posterior cortical atrophy and typical Alzheimer’s disease: a cross-section study using optical coherence tomography angiography

Fig. 1

Illustrations for SS-OCT and OCTA image quantification. A The ETDRS grid of one participant’s right eye: the ETDRS grid, centered on the fovea of the macula, divides the retina into nine regions with three rings and four quadrants. FC for foveal center; SI for superior inner; NI for nasal inner; II for inferior inner; TI for temporal inner; SO for superior outer; NO for nasal outer; IO for inferior outer; and TO for temporal outer. Pericentral ring refers to the concentric ring from 1 to 3 mm diameter (i.e., SI + NI + II + TI). Peripheral ring refers to the concentric ring from 3 to 6 mm diameter (i.e., SO + NO + IO + TO). B FAZ quantification image of one participant’s right eye, marked by the red curve

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Alzheimer's Research & Therapy

ISSN: 1758-9193