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Abstract
This study aims to evaluate the diagnostic role of combined OCT/SLO in
different macular pathologies, which operates in two scanning modes: Bscan,
which produces cross sectional (longitudinal) images of the retina and
C-scan, which produces coronal (transversal) scans of the retina, thus
producing images that are pixel-to-pixel in correspondence with the confocal
image.
This study included 129 eyes with different macular disorders and 20
normal individuals to enhance the interpretation of OCT C-scans and to
study retinal image patterns, as C-scan imaging is new in its application to
OCT and the images are challenging at first glance because they reveal
details of inner retinal structure that until now has only been looked at Bscan
perspective. Transversal C-scans can provide information not available
using conventional OCT imaging, particularly in cases of vitreo-macular
adhesions and epiretinal membranes, where points of antero-posterior or
tangential traction are also well localized, thus assisting in further
management. The different patterns of macular edema shown both by B-scan
and C-scan aided in the diagnosis and follow up of the patients. B-scan gives
precise information about the amount of edema in contrast to C-scan.
Conclusion: The combination of several C-scans at different depths with a
simultaneously acquired confocal image using the overlay facility and by
adding information from B-scans and retinal topography, a broader
understanding of the imaged retinal pathology can be acquired.