1. Articles from Susana Penas

    1-5 of 5
    1. 3D Mapping of Choroidal Thickness from OCT B-Scans

      3D Mapping of Choroidal Thickness from OCT B-Scans

      The choroid is the middle layer of the eye globe located between the retina and the sclera. It is proven that choroidal thickness is a sign of multiple eye diseases. Optical Coherence Tomography (OCT) is an imaging technique that allows the visualization of tomographic images of near surface tissues like those in the eye globe. The automatic calculation of the choroidal thickness reduces the subjectivity of manual image analysis as well as the time of large scale measurements. In this paper, a method for the automatic estimation of the choroidal thickness from OCT images is presented. The pre-processing of the ...

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    2. Spectral-Domain Optical Coherence Tomography as a Potential Biomarker in Huntington's Disease

      Spectral-Domain Optical Coherence Tomography as a Potential Biomarker in Huntington's Disease

      Background Spectral-domain optical coherence tomography has been used in several neurological conditions, and peripapillary and macular measurements have been proposed as potential biomarkers in these disorders. The aim of this study was to investigate retinal and choroidal changes in Huntington's disease and to evaluate any potential correlation with the stage of the disease. Methods A cross-sectional observational study compared patients with Huntington's disease and controls. Patients were evaluated using the Unified Huntington's Disease Rating Scale. Spectral-domain optical coherence tomography with enhanced depth imaging was used, and peripapillary choroidal and retinal nerve fiber layer thickness and macular retinal ...

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    3. Retinal Nerve Fiber Layer Thickness Analysis with Optical Coherence Tomography in Wolfram Syndrome

      Retinal Nerve Fiber Layer Thickness Analysis with Optical Coherence Tomography in Wolfram Syndrome

      Purpose: To evaluate the peripapillary retinal nerve fiber layer (RNFL) in Wolfram’s Syndrome (WS) using optical coherence tomography (OCT). Methods: The peripapillary RNFL of eighteen eyes of nine patients with the clinical diagnosis of WS were measured using Stratus OCT. The RNFL was determined consecutively three times. Results: The mean RNFL thickness is inferior to the 99% normal limit given by the instrument´s normative database in all patients. The superior and inferior quadrants were beneath the 99% normal limit in every patient. The nasal quadrant was at the level 1-5% in 37.0% of the measurements and at ...

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    4. Spectral-domain optical coherence tomography features of acute syphilitic posterior placoid chorioretinitis: the role of autoimmune response in pathogenesis

      Spectral-domain optical coherence tomography features of acute syphilitic posterior placoid chorioretinitis: the role of autoimmune response in pathogenesis

      PURPOSE: Syphilis is an infectious disease that can cause a wide variety of ocular signs. One of the rarest manifestations of ocular syphilis is acute syphilitic posterior placoid chorioretinitis (ASPPC). We report on the spectral-domain optical coherence tomography (SD-OCT) features of a case diagnosed with unilateral ASPPC. METHODS: A 64-year-old man presented with a sudden loss of visual acuity (VA) in the right eye. His only clinical sign was a large, geographic, yellow-white lesion centered on the right fovea. Our patient was studied with SD-OCT on presentation and during follow-up, as well as with fluorescein and indocyanine green angiography, electrophysiological ...

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    1-5 of 5
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  2. Topics in the News

    1. (1 articles) Heidelberg Engineering
    2. (1 articles) Carl Zeiss Meditec
    3. (1 articles) Zeiss Stratus OCT
    4. (1 articles) Heidelberg Spectralis
    5. (1 articles) Zeiss Visante OCT
    6. (1 articles) Semmelweis University
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    Spectral-domain optical coherence tomography features of acute syphilitic posterior placoid chorioretinitis: the role of autoimmune response in pathogenesis Retinal Nerve Fiber Layer Thickness Analysis with Optical Coherence Tomography in Wolfram Syndrome Spectral-Domain Optical Coherence Tomography as a Potential Biomarker in Huntington's Disease Early Longitudinal Spectral Domain Optical Coherence Tomography Findings in Subacute Sclerosing Panencephalitis 3D Mapping of Choroidal Thickness from OCT B-Scans Role of Intravascular Imaging in Primary PCI (Book Chapter) Clinical and OCT Findings in a Case of a Presumed Perfluorooctane Retinal Acute Toxicity Semi-manual Vessel Density Analysis on Optical Coherence Tomography Angiography Images of Healthy Adults OCT vs. Angiography to Guide PCI Thorlabs Extends OCT Offering to Include 248 kHz A-Scan Rate Systems Foveal avascular zone and vessel density in healthy subjects: An optical coherence tomography angiography study Non-Invasive and Non-Destructive Determination of Corneal and Scleral Biomechanics Using Vibrational Optical Coherence Tomography: Preliminary Observations