Session Title: Free Paper Session 17: Imaging II
Session Date/Time: Saturday 09/09/2017 | 08:00-09:30
Paper Time: 09:12
Venue: Room 120
First Author: : I.Muftuoglu USA
Co Author(s): : D. Bartsch G. Barteselli R. Gaber J. Nezgoda W. Freeman
To compare the visualization of epiretinal membrane (ERM) using multicolour imaging (MCI) (Heidelberg Engineering, Carlsbad, CA) and conventional white light flood colour fundus photography (FP) (Topcon, Tokyo, Japan).
Jacobs Retina centre, Shiley Eye Institute, University of California San Diego
The paired images of ERM patients who underwent same-day MCI and FP examinations were reviewed. Visibility of the ERM was graded using a scale (0: not visible, 1: barely visible, 2: clearly visible) by masked readers and surface folds were counted to quantify the membrane visibility for each method. Images from individual colour channels in MCI (green, blue, and infrared) were also graded using same method to further investigate MCI images.
Forty-eight eyes of 42 patients were included. The average ERM visibility score was 1.8 ± 0.37 for MCI and 1.01 ± 0.63 for FP (P < 0.001). The number of the surface folds detected per quadrant was significantly higher in MCI than that in FP (6.79 ± 3.32 vs. 2.85 ± 2.81, P < 0.001). The ERM was graded with similar scores on the two modalities in 43.8% of the eyes; in 56.2%, the ERM was better visualized on MCI than that on FP. Conventional FP failed to detect ERM in 11.4% of eyes when the mean central retinal thickness was <413 microns. Analysis of laser colour reflectance revealed that green reflectance provided better detection of surface folds (5.54 ± 2.12) compared to blue reflectance (4.2 ± 2.34) and infrared reflectance (1.2 ± 0.9).
Multicolour scanning laser imaging provides superior ERM detection and delineation of surface folds than conventional FP, primarily due to the green channel present in the combination-pseudocolour image in MCI.