Session Title: Imaging II
Session Date/Time: Friday 18/09/2015 | 16:30-18:00
Paper Time: 17:50
First Author: : M.Stopa POLAND
Co Author(s): : E. Marciniak P. Rakowicz A. Stankiewicz T. Marciniak A. Dabrowski
PURPOSE:to present a new tool to study the vitreomacular interface that is based on generation of SD-OCT Virtual Maps of the Posterior Vitreous Cortex
prospective evaluation of a new image analysis technique
We included a total of 21 patients with vitreomacular interface pathology (vitreomacular adhesion, vitreomacular traction). In our new approach frame-by-frame B-scans were processed and refined by advanced digital imaging algorithms, including application of graph analysis approach, that allow for the optimal segmentation of epiretinal pathologies and retinal surface. Posterior vitreous cortex was marked on each B-scan by a human expert in a specially developed software. Color thickness maps representing the distance between the posterior surface of the epiretinal pathology and inner limiting membrane (ILM) layer in vitreomacular traction were obtained and analyzed.
There were 11 male and 10 female patients. The mean age was 69 years with an age range 57-89. There were 11 patients with vitreomacular adhesion (VMA) and 10 with vitreomacular traction (VMT). Posterior vitreous cortex was more elevated in the superior quadrants in 80% (8/10) of VMT and only in 54% of VMA (6/11) cases.
The new virtual maps of the posterior vitreous cortex are a powerful tool to analyze the vitreomacular interface. The new virtual maps can provide guidance for safer positioning of surgical instruments in macular surgery. The majority of eyes with vitreomacular traction group showed a higher elevation of the posterior vitreous cortex in superior quadrants in our study group opposed to the vitremacular adhesion cases.