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Nathan V. Harms, Aniruddha Agarwal, Shan Fan, Alessandro Invernizzi, Diana V Do, Quan Nguyen, Yasir Jamal Sepah; Characterization of retinal structure and diagnosis of peripheral acquired retinoschisis using high-resolution ultrasound B-scan. Invest. Ophthalmol. Vis. Sci. 2015;56(7 ):5956.
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Using conventional B-scan, it may not be possible to differentiate individual retinal layers to distinguish retinoschisis (RS) from retinal detachment (RD). We performed a retrospective study to report the ability of high-resolution ultrasonography (USG) B-Scan in differentiating between acquired RS and RD, and compared the findings with spectral-domain optical coherence tomography (SD-OCT).
Patients with acquired peripheral RS and RD undergoing imaging with high resolution B-scan USG and SD-OCT were included in the study. RS was considered in the presence of an immobile, dome-shaped visible elevation of the peripheral retina. SD-OCT images were obtained with the Spectralis OCT. A 20°×15° horizontal raster-line scan, encompassing the attached and detached retina was obtained for each patient. B-scan USG was performed using Ellex Eye Cubed ®. Descriptive analysis was performed on the images obtained by high-resolution B-scan USG and SD-OCT to identify various retinal layers.
Six eyes of 5 patients (2 males) with RS, 7 eyes of 4 patients (3 males) with RD and 1 eye of a patient with schisis-detachment were included in the study. In all eyes of patients with RS, the attached outer retina demonstrated the presence of two hyper-reflective layers corresponding to the outer plexiform layer (OPL) and retinal pigment epithelium (RPE). Eyes with RD demonstrated two hyper-reflective layers in the detached portion, corresponding to the nerve fiber layer and OPL, whereas the attached portion demonstrated the presence of the third hyper-reflective layer, i.e. RPE (figure). These findings correlated well with SD-OCT.
Analysis of retinal layers on high-resolution USG B-scan may allow precise differentiation of acquired RS from RD by identification of various retinal layers. These findings correlate well with SD-OCT.
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