ArticleInvestigative ophthalmology & visual science2024
A Novel Grid Strategy for Correlating Focal Macular Anatomic Changes With Focal Changes in Choriocapillaris Perfusion.
Article in Investigative ophthalmology & visual science, 2024. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 3 papers.
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Who cites it
3 citing papers in PubMed.
- Exploring the Maximum Detectable Percentage of Choriocapillaris Flow Deficits Within Geographic Atrophy Using SS-OCT Angiography.Investigative ophthalmology & visual science · 2026Article
- Impact of Swept-Source OCT Angiographic Scanning Speeds on the Detection of Choriocapillaris Flow Deficits in Eyes With AMD.Translational vision science & technology · 2026Article
- Changes in Choriocapillaris Flow Deficits Before and After the Onset of Large Choroidal Hypertransmission Defects in AMD.Investigative ophthalmology & visual science · 2025Article
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Authors and funding
11 authors.
Funding
Abstract
Purpose: To establish the repeatability of choriocapillaris flow deficit (CCFD) measurements within a macular grid and then demonstrate the use of this registered grid strategy to follow CCFD measurements over time. Methods: Swept-source optical coherence tomography angiography scans were acquired (nominal size of 6 × 6 mm). For each scan, masks of hyperreflective foci, calcified drusen, and persistent choroidal hypertransmission defects (hyperTDs) were generated. These masks were then used to exclude these prespecified regions when calculating the CCFD percentages (CCFD%). Scans were registered, and CCFD% measurements were performed within 3-mm and 5-mm fovea-centered circles and within a fovea-centered grid (one box: 74 × 74 pixels). The 95% minimal detectable changes (MDC95) for CCFD% were calculated for each of the regions. This longitudinal grid workflow was then used to study eyes before and after drusen resolved. Results: Ninety eyes of 63 patients were identified: 30 normal eyes, 30 eyes with intermediate age-related macular degeneration (iAMD), and 30 eyes with hyperTDs. The MDC95 for the normal, iAMD, and hyperTD eyes within the 3-mm and 5-mm circles ranged from 0.85% to 1.96%. The MDC95 for an individual grid's box ranged from 3.35% to 4.67%, and for the total grid area, the MDC95 ranged from 0.91% to 1.40%. When tested longitudinally before and after the resolution of drusen using grid strategy, no significant differences in the CCFD% were observed. Conclusions: A grid strategy was developed to investigate targeted longitudinal changes in CCFD% associated with changes in optical coherence tomography biomarkers, and this strategy was validated using eyes in which drusen resolved.
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