High-Resolution Optical Coherence Tomography Retinal Imaging: A Case Series Illustrating Potential and Limitations

Figure 5

SD-OCT of a patient with branch retinal vein occlusion (OS). Scan parameters: infrared scan angle 30°; OCT scan angle 30°; pattern size 30°×20°, 25 sections (243 μm between B-scans). (a) The conventional fundus camera imaging revealed numerous hemorrhages and edema in the superior temporal retina with macular involvement. The macula was yellow and edematous. (b) SD-OCT en-face image of the fundus (note that the cross-sectional image is located approximately 5° superior to the superior ONH margin). The green arrow shows the position of the scan line used to generate the cross-sectional retinal OCT image (i.e., (c)). (c) The cross-sectional retinal image showed retinal edema with fluid cysts in the outer retina (arrow “1”) and an apparently thickened inner retina with superficial hemorrhages (arrow “2”) which “shadow” the underlying retinal details. (d) The lower red segment line (shown in (c)) fails to fit the true position of Bruch’s membrane; the line was positioned based on visible parts of Bruch’s membrane. The cross-sectional retinal thickness profile revealed a markedly thickened retina in the center of the BRVO (retinal thickness is close to 600 μm).