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Related Concept Videos

Imaging Studies VII: Vascular Imaging01:19

Imaging Studies VII: Vascular Imaging

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DefinitionRenal angiography, also known as renal arteriography, is an imaging technique used to obtain a comprehensive view of blood flow and the vascular structure of blood vessels in the kidneys and surrounding areas.PurposeRenal angiography detects blood vessel abnormalities in the kidneys, such as aneurysms, stenosis, thrombosis, vascular tumors, and renal artery stenosis. It evaluates kidney function and guides interventional treatments like angioplasty or stent placement.Pre-Procedure...
424

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Related Experiment Video

Updated: Feb 28, 2026

Evaluation of Capillary and Other Vessel Contribution to Macular Perfusion Density Measured with Optical Coherence Tomography Angiography
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POLYPOIDAL CHOROIDAL VASCULOPATHY UPON OPTICAL COHERENCE TOMOGRAPHIC ANGIOGRAPHY.

Szy Yann Chan1, Qian Wang1, Ya Xing Wang2

  • 1Beijing Tongren Eye Center, Beijing Tongren Hospital, Beijing Ophthalmology and Visual Science Key Lab, Capital Medical University, Beijing, China.

Retina (Philadelphia, Pa.)
|June 15, 2017
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Summary

Optical coherence tomography angiography (OCTA) effectively detects polypoidal choroidal vasculopathy and branching choroidal vascular networks. This noninvasive imaging method offers superior visualization of lesion details compared to indocyanine green angiography.

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Area of Science:

  • Ophthalmology
  • Medical Imaging
  • Vascular Biology

Background:

  • Polypoidal choroidal vasculopathy (PCV) is a subtype of age-related macular degeneration.
  • Branching choroidal vascular networks are a key feature of PCV.

Purpose of the Study:

  • To evaluate optical coherence tomography angiography (OCTA) for detecting polypoidal lesions and branching choroidal vascular networks in PCV.
  • To compare OCTA with indocyanine green angiography (ICGA) in PCV detection.

Main Methods:

  • Observational cross-sectional study.
  • Patients with PCV diagnosed by ICGA underwent OCTA.
  • Analysis of polypoidal lesions and vascular networks using OCTA and ICGA.

Main Results:

  • OCTA detected branching choroidal vascular networks in 94% of eyes, compared to 78% with ICGA.
  • 72 polyps were identified, with OCTA consistently visualizing them.
  • Cluster-like structures and internal flow channels were visualized in polypoidal lesions by OCTA.

Conclusions:

  • OCTA is a valuable noninvasive tool for detecting PCV and its associated vascular abnormalities.
  • OCTA provides detailed visualization of polypoidal lesions and branching choroidal vascular networks.
  • OCTA demonstrated superiority over ICGA in detecting PCV in some cases.