Authors and their organizations：
Nicola Y. Gan MBBS, MMed (Ophth), FRCOphth (Ldn); Cheryl Zimmer, OD; Wai-Ching Lam, MD, FRCSC
From the University of Hong Kong, Hong Kong (WCL); the National Healthcare Group Eye Institute, Tan Tock Seng Hospital, Singapore (NYG); and Annidis Corporation, Ontario, Canada (CZ).
Background and objective:
To illustrate the features of a circumscribed choroidal hemangioma (CCH) using Annidis RHA multi-spectral imaging (MSI) technology (Annidis Corporation, Ottawa, Canada). This novel imaging technique uses non-overlapping, narrow-band LED light sources ranging from 520 nm to 940 nm to create a monochromatic series of en face fundus images and oxy/deoxyhemoglobin contrasted maps of the retina and choroid.
Patients and methods:
Annidis RHA MSI images were taken of a 67-year-old Chinese male with CCH. These en face fundus images are presented alongside the traditional fundus photograph, optical coherence tomography, and fluorescein and indocyanine green angiograms.
Results:
Multi-spectral en face images of the outer retina and choroid demonstrated a clearly delineated lesion with a disorganized choroidal vascular network and increased reflectance/ oxyhemoglobin levels within.
Conclusion:
MSI technology is a noninvasive imaging technique that can depict the vascular features and choroidal oxygenation of CCH lesions and has a potential role in monitoring its growth complications.
