Abstract
Purpose :
OCT angiography (OCTA) is a new technology allowing the imaging of retinal microvascular flow without the injection of an intravenous dye. New devices using Swept source laser have recently been developed, allowing faster acquisition with wider scan patterns.
Methods :
Observational study of 10 patients with severe non proliferative or proliferative diabetic retinopathy diagnosed with standard criteria. OCTA was performed using 9x15 and 12x12 mm scans using the PLEX® Elite 9000 (Carl Zeiss Meditec, Dublin, CA). A montage was automatically performed after 5 12x12 squares were acquired with a dedicated protocol.
Results :
In all eyes, OCT-A imaging demonstrates large areas of non perfusion, and proliferation of preretinal or prepapillary new vessels. As compared to fluorescein angiography, there is no leakage of a dye. The morphology of the new vessels is very well defined. The montage is covering up to 70° of the fundus, much larger than conventional Angio cameras.
Conclusions :
SS-OCTA is a safe and fast imaging modality able to demonstrate non perfusion areas,preretinal and prepapillary newvessels. It requires some cooperation of the patient to acquire the peripheral OCT-A cubes. However, when wide field SS-OCTA is properly performed, fluorescein angiography is no more required.
This is an abstract that was submitted for the 2018 ARVO Annual Meeting, held in Honolulu, Hawaii, April 29 - May 3, 2018.