Montage techniques using SD-OCT have been tried in idiopathic macular holes,[1] normal subjects, diabetic retinopathy and Vogt-Koynagi-Harada disease.[2] We present a wide-field montage image from macula to the fundus periphery in a case of polypoidal choroidal vasculopathy (PCV) by using spectral domain optical coherence tomography (SD-OCT) [Fig. 1a]. While the SD-OCT features in the macula for PCV are well defined [Fig. 1b and c], there is a paucity of data concerning the peripheral SD-OCT changes. Merging the SD-OCT the scan length obtained was 26 mm. This enables us to visualize the pathology in relation to other retino-choroidal areas and the optic disc. This helps us study the peripheral changes in a single image. Advantages include no additional costs, large scan length, and more information in a single image. This manual technique is time consuming, automated algorithms, and swept-source imaging[3] with wider scans may overcome this issue.
Figure 1.
Combined SD-OCT and multicolor image (a) montage SD-OCT showing the large pigment epithelial detachment nasal to the fovea with hyper reflective double layer sign, (b) a 3-Dimensional slab, and (c) a 200 degrees fundus image (Optos PLC, Dunfermline, Scotland, UK)
Financial support and sponsorship
Nil.
Conflicts of interest
There are no conflicts of interest.
References
- 1.Mori K, Kanno J, Gehlbach PL, Yoneya S. Montage images of spectral-domain optical coherence tomography in eyes with idiopathic macular holes. Ophthalmology. 2012;119:2600–8. doi: 10.1016/j.ophtha.2012.06.027. [DOI] [PubMed] [Google Scholar]
- 2.Mori K, Kanno J, Gehlbach PL. Retinochoroidal morphology described by wide-field montage imaging of spectral domain optical coherence tomography. Retina. 2016;36:375–84. doi: 10.1097/IAE.0000000000000703. [DOI] [PMC free article] [PubMed] [Google Scholar]
- 3.Klein T, Wieser W, Eigenwillig CM, Biedermann BR, Huber R. Megahertz OCT for ultrawide-field retinal imaging with a 1050nm Fourier domain mode-locked laser. Opt Express. 2011;19:3044–62. doi: 10.1364/OE.19.003044. [DOI] [PubMed] [Google Scholar]