4.5 Review

Multimodal imaging in pachychoroid spectrum

期刊

SURVEY OF OPHTHALMOLOGY
卷 67, 期 2, 页码 579-590

出版社

ELSEVIER SCIENCE INC
DOI: 10.1016/j.survophthal.2021.07.004

关键词

Pachychoroid spectrum disease; Multimodal imaging; Optical coherence tomography; angiography; Indocyanine green angiography; Fluorescein angiography; Multicolor imaging

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The diagnostic investigation on pachychoroid spectrum disease (PSD) has been expanding with the advancement of imaging technology. Optical coherence tomography (OCT)-based studies have demonstrated various patterns in choroidal thickness profile, luminal and stromal choroidal ratio, and abnormalities in the neurosensory retina in different clinical entities related to PSD. OCT angiography (OCTA) has played a growing role in quantitative analysis of OCTA parameters and evaluation of choriocapillaris signal void and vessel density as indicators of choriocapillaris ischemia. Recent studies using indocyanine green angiography have focused on the evaluation of choroidal vascular hyperpermeability and its relationship with other pachychoroid related features. Ultra-widefield indocyanine green angiography allows observation and characterization of peripheral choroidal pathologies and their associations with macular abnormalities. Multicolor imaging is emerging as a modality to demonstrate early abnormalities in PSD. This article summarizes the new insights into the application of multimodal imaging for PSD and focuses on novel findings observed in different clinical entities with each imaging modality.
Diagnostic investigation on pachychoroid spectrum disease (PSD) has been growing along with the rapid advancement of imaging technology. In optical coherence tomography (OCT)-based studies, choroidal thickness profile, luminal and stromal choroidal ratio, and abnor-malities in the neurosensory retina have demonstrated various patterns in different clinical entities related to PSD. The emerging role of OCT angiography ()CTA) has been expanded to involve the quantitative analysis of the OCTA parameters in different clinical entities of PSD and to evaluate the choriocapillaris signal void and vessel density as indicators of choriocap-illaris ischemia. OCTA has broadened our knowledge in characterization and assessment of both active and quiescent choroidal neovascularization and its association with treatment response. Recent studies using indocyanine green angiography have focused on the evalu-ation of choroidal vascular hyperpermeability and its relationship with other pachychoroid related features. Ultra-widefield indocyanine green angiography enables observation and characterization of peripheral choroidal pathologies and their associations with macular ab-normalities. Multicolor imaging is an emerging modality with the capability to demonstrate early abnormalities in PSD. We summarize all investigations reflecting the new insights into the application of multimodal imaging for PSD and focus on novel findings observed in dif-ferent clinical entities with each imaging modality. (c) 2021 Elsevier Inc. All rights reserved.

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