Purpose:
To describe a novel analysis and evaluation method of eyes with vitreomacular interface abnormalities using en face C-scan with reconstructed 3D image by SD OCT
Methods:
Topcon 3D OCT provides high resolution cross sectional (B-scan), coronal (C-scan) images of the posterior fundus and 3D volumetric retinal reconstructions of the area by comprehensive 3D data rendering software. In 50 eyes in 60 patients with vitreomacular interface abnormalities including epiretinal membranes(ERM), macular hole, vitreomacular traction syndrome, the longitudinal "B" scan images and the transverse "C" scan images in the coronal plane and 3D image were used to describe vitreomacular interface abnormalities.
Results:
The B-scan and en-face C-scan images allowed the identification of tractional forces of ERM and VMTS, contour of the hyaloid membrane and changes in inner retinal surface (Figure). A simultaneously obtained 3D OCT image of the fundus offered exact co-localization of retinal structures and vitreomacular interface abnormalities.
Conclusions:
This study demonstrates the synergy between the two types of scans, in providing a more complete view of the pathologic condition. This novel interpretation method enabled the visualization and better understanding of various vitreomacular interface abnormalities, which is introduced for the first time.
Keywords: imaging methods (CT, FA, ICG, MRI, OCT, RTA, SLO, ultrasound)