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Phase-resolved Doppler Optical Coherence Tomographic features in Retinal Angiomatous Proliferation.

Am. J. Ophthalmol. 2015, vol. 160, issue 5

PURPOSE

To study patients diagnosed with retinal angiomatous proliferation (RAP) based on conventional imaging techniques with phase-resolved Doppler optical coherence tomography (OCT) to detect and localize blood flow in RAP lesions and to compare these findings to conventional imaging, which are mostly invasive and give limited information concerning intra- and transretinal blood flow.

DESIGN

Single-center, consecutive observational case series.

METHODS

Twelve treatment-naïve patients diagnosed with RAP based on fundus examination, fluorescein and indocyanine-green angiography, were included. Median age was 79 years (range 65-90). Patients were imaged with an experimental 1040 nm swept-source phase-resolved Doppler-OCT instrument. Abnormal flow was defined as intraretinal neovascularisation or retinal-choroidal anastomosis.

RESULTS

In 11 patients adequate phase-resolved Doppler-OCT images were obtained showing abnormal blood flow in the RAP lesion. In 4 patients an retinal-choroidal anastomosis was found, 3 patients showed intraretinal neovascularisation connected with a pigment epithelial detachment, 2 patients showed only intraretinal neovascularisation, and in 2 patients flow was limited to the subretinal or sub-retinal pigment epithelial space.

CONCLUSIONS

Phase-resolved Doppler-OCT is able to detect and localize abnormal blood flow within RAP lesions. Blood flow was mostly confined to the intraretinal structures with or without a connecting pigment epithelial detachment; in one third a retinal-choroidal anastomosis was detected. The potential of angiography with phase-resolved Doppler-OCT to accurately distinguish between normal and pathological blood flow in addition to structural OCT data without invasive procedures will help to further elucidate both retinal and choroidal vascular pathologies like RAP.

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