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Paul F Stetson, John Legarreta, Andrew Dominic Legarreta, Mariana R Thorell, Giovanni Gregori, Philip J Rosenfeld; En-Face Imaging of Microcysts in Macular Teleangiectasia Type 2 Using Minimum- and Mean-Intensity Projections. Invest. Ophthalmol. Vis. Sci. 2015;56(7 ):2803.
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© ARVO (1962-2015); The Authors (2016-present)
This study is to demonstrate visualization of microcysts in cases of macular teleangiectasia type 2 (MacTel2) using en-face imaging, and to compare minimum-intensity projection with typical mean-intensity projection en-face imaging for the detection of these microcysts.
Data from patients with MacTel2 were gathered from a prototype swept-source OCT system. These image volumes were processed offline to create two types of en-face images, one using the mean intensity between the ILM and RPE segmentations, and another using the minimum intensity of the speckle-reduced image between the ILM and RPE segmentations. Apparent microcysts in the en-face images were verified by viewing the B-scans through those locations.
Microcysts were found in 10 out of 35 eyes using standard mean-intensity projections and 15 out of 35 eyes using minimum-intensity projections.
Microcysts are commonly found in cases of MacTel2. The minimum-intensity projection allows better detection of these microcysts than standard en-face imaging.
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