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    1. Mentioned In 51 Articles

    2. Non-malignant conjunctival epithelial masses with ocular surface squamous neoplasia-like optical coherence tomography features

      Explore Home - Springer Ophthalmology
      Non-malignant conjunctival epithelial masses with ocular surface squamous neoplasia-like optical coherence tomography features
      Purpose: To observe and describe the anterior segment optical coherence tomography features of limbally localised non-malignant epithelial mass lesions METHODS: Thirteen patients (age: 66.9 16.3 years) with conjunctival mass suggesting ocular surface squamous neoplasia with biomicroscopic examination were imaged using anterior segment ocular coherence tomography (anterior segment optical coherence tomography)/Cirrus HD-OCT, Model 4000, Carl Zeiss Meditec, Inc., Dublin, CA, and Spectralis HRA + OCT system, Heidelberg Engineering, Vista ...
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      Mentions: Heidelberg Engineering Carl Zeiss Meditec Semmelweis University

    3. Optical coherence tomography angiography in glaucoma: analysis of the vessel density-visual field sensitivity relationship

      Explore Home Ophthalmology
      Optical coherence tomography angiography in glaucoma: analysis of the vessel density-visual field sensitivity relationship
      Glaucoma, a well-defined group of progressive optic neuropathies is one of the leading causes of irreversible blindness worldwide. In order to stop or slow down the progression of glaucomatous vision deterioration, intraocular pressure reduction by medical, laser or surgical treatment is needed. To ensure that treatment is efficient and tailored to the actual needs both cross sectional evaluation of disease severity and measurement of rate of progression are essential. Currently ...
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      Mentions: Semmelweis University

    4. The Impact of Deterministic Signal Loss on OCT Angiography Measurements

      Explore TVST Journal Ophthalmology
      The Impact of Deterministic Signal Loss on OCT Angiography Measurements
      Purpose : In this study, we aimed at investigating the impact of deterministic signal loss on image quality and, thus, on optical coherence tomography angiography (OCTA) measurements performed by the RTVue-XR Avanti System. Methods : Absorptive filters with different optical densities (ODs) were used to simulate signal loss in a controlled way in 30 eyes from 15 healthy subjects. Scan Quality (SQ), provided by the AngioVue software, was applied as a measure ...
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      Mentions: Semmelweis University

    5. Examination of corneal deposits in nephropathic cystinosis using in vivo confocal microscopy and anterior segment optical coherence tomography: an age-dependent cross sectional study

      Explore Home - Springer Ophthalmology
      Examination of corneal deposits in nephropathic cystinosis using in vivo confocal microscopy and anterior segment optical coherence tomography: an age-dependent cross sectional study
      Background Presence of corneal cystine crystals is the main ocular manifestation of cystinosis, although controversial findings concerning the corneal layer with the highest density have been reported. The aim of this study was the analysis of the characteristics of crystal arrangement in different corneal layers and the assessment of corneal morphological changes with age. Methods A cross sectional study was carried out in three children and three adults who had ...
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      Mentions: Semmelweis University

    6. SWEPT SOURCE OPTICAL COHERENCE TOMOGRAPHY ANGIOGRAPHY, FLUORESCEIN ANGIOGRAPHY, AND INDOCYANINE GREEN ANGIOGRAPHY COMPARISONS REVISITED

      Explore LWW Online Ophthalmology
      SWEPT SOURCE OPTICAL COHERENCE TOMOGRAPHY ANGIOGRAPHY, FLUORESCEIN ANGIOGRAPHY, AND INDOCYANINE GREEN ANGIOGRAPHY COMPARISONS REVISITED
      Purpose: To compare area measurements between swept source optical coherence tomography angiography ( SSOCTA ), fluorescein angiography ( FA ), and indocyanine green angiography ( ICGA ) after applying a novel deep-learning-assisted algorithm for accurate image registration. Methods: We applied an algorithm for the segmentation of blood vessels in FA , ICGA , and SSOCTA images of 24 eyes with treatment-naive neovascular age-related macular degeneration. We trained a model based on U-Net and Mask R-CNN for each imaging ...
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      Mentions: Medical University of Vienna Semmelweis University

    7. The effect of image quality on the reliability of OCT angiography measurements in patients with diabetes

      Explore journalretinavitreous.biomedcentral.com Ophthalmology
      The effect of image quality on the reliability of OCT angiography measurements in patients with diabetes
      Background This study aimed to determine the relationship between image quality and measurement repeatability of optical coherence tomography angiography (OCTA) parameters in patients with non-proliferative diabetic retinopathy. Methods A total of 100 eyes of 50 patients were included in the study. Three OCTA images were obtained consecutively during one session of imaging in all patients using the RTVue AngioVue OCTA device. We applied the signal strength index (SSI) provided by ...
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      Mentions: Semmelweis University

    8. What’s New in Optical Coherence Tomography Angiography for Glaucoma (Book Chapter)

      Explore Home - Springer Ophthalmology , Textbooks
      What’s New in Optical Coherence Tomography Angiography for Glaucoma (Book Chapter)
      Glaucoma is one of the main clinical areas where OCT angiography is used. In contrast to medical retinal application, where qualitative image analysis and semiquantitative measurements are frequently satisfactory for clinical decision-making, in glaucoma the exact quantitative measurements provide the useful information. Therefore both general ophthalmologists who treat glaucoma patients and glaucoma subspecialists need to be familiar with the measurement details of OCT angiography, the types of complementary structural information ...
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      Mentions: Semmelweis University

    9. Enhanced depth imaging and swept-source optical coherence tomography findings in choroidal osteoma: a case report

      Explore Home - Springer Ophthalmology
      Enhanced depth imaging and swept-source optical coherence tomography findings in choroidal osteoma: a case report
      Purpose The aim of this study was to report the findings from enhanced depth imaging (EDI) and swept-source optical coherence tomography (OCT) in a choroidal osteoma. Methods A case study of a patient with choroidal osteoma is presented and discussed. Results A 25-year-old woman presented with an asymptomatic peripapillary mass. Fundus examination revealed a yelloworange, well-defined geographical lesion. B‑scan ultrasonography, corroborated by fundus autofluorescence (FAF) and OCT findings, pointed ...
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      Mentions: Semmelweis University

    10. Influence of Posterior Subcapsular Cataract on Structural OCT and OCT Angiography Vessel Density Measurements in the Peripapillary Retina

      Explore LWW Online Ophthalmology
      Influence of Posterior Subcapsular Cataract on Structural OCT and OCT Angiography Vessel Density Measurements in the Peripapillary Retina
      Purpose: To investigate the influence of posterior subcapsular cataract (PSC) on structural optical coherence tomography (OCT) and OCT angiography vessel density (VD) measurements. Methods: One eye each of 10 consecutive participants with PSC were imaged using the Angiovue/RTvue-XR OCT via undilated pupil, and 30 minutes later via dilated pupil. Peripapillary retinal nerve fiber layer thickness (RNFLT), peripapillary capillaries and all-vessels VD, ganglion cell complex thickness (GCC), parafoveal VD and ...
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      Mentions: Semmelweis University

    12. Semi-manual Vessel Density Analysis on Optical Coherence Tomography Angiography Images of Healthy Adults

      Explore Home - ClinicalTrials.gov Ophthalmology , Clinical Trials
      Semi-manual Vessel Density Analysis on Optical Coherence Tomography Angiography Images of Healthy Adults
      Optical coherence tomography angiography (OCTA) is a software upgrade on conventional spectral-domain or swept-source optical coherence tomography devices that enables non-invasive, dye-free, three dimensional analysis of the retinal vessels. Vessel density is a very important parameter almost in all retinal disorders. In the recent past, automated quantification software was built into some OCTA devices which can automatically calculate the retinal vessel density as well. In this study two semi-manual techniques ...
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      Mentions: Carl Zeiss Meditec Semmelweis University

    13. Valsalva Maneuver and Peripapillary OCT Angiography Vessel Density

      Explore LWW Online Ophthalmology
      Valsalva Maneuver and Peripapillary OCT Angiography Vessel Density
      Purpose: To investigate the potential influence of breath holding on the results of peripapillary vessel density (VD) measurement with optical coherence tomography angiography. Materials and Methods: Three peripapillary VD measurements were made at 2-minute intervals on the right eye of 12 healthy young volunteers using the Angiovue/RTvue-XR OCT (software version 2017.1, Phase 7 update) without changing the head and body positions. During the first 2 measurements the volunteers ...
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      Mentions: Semmelweis University

    14. Choroidal thickness changes in non-treated eyes of patients with diabetes: swept-source optical coherence tomography study

      Explore Home - Springer
      Choroidal thickness changes in non-treated eyes of patients with diabetes: swept-source optical coherence tomography study
      Aims To measure choroidal thickness (CT) in diabetic eyes and its correlation with metabolic status and the severity of diabetic retinopathy (DR). Materials and methods Prospective cross-sectional study using swept-source optical coherence tomography. CT maps of 96 treatment nave eyes of 48 patients with diabetes were compared to 46 eyes of 23 healthy controls. CT changes and their relation to diabetes, age, gender, disease duration, hypertension (HT), hemoglobin A1c level ...
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      Mentions: Semmelweis University

    15. The Use of Optical Coherence Tomography for the Detection of Early Diabetic Retinopathy

      Explore Thieme Ophthalmology
      The Use of Optical Coherence Tomography for the Detection of Early Diabetic Retinopathy
      Diabetic retinopathy (DR) is one of the leading causes of vision loss globally with a severe burden on all societies due to its high treatment and rehabilitation costs. The early diagnosis of DR may provide preventive steps (including retinal laser therapy and tight carbohydrate, blood pressure, and cholesterol control) that could in turn help to avoid progression of the pathology with the resultant vision loss. Optical coherence tomography (OCT) enables ...
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      Mentions: University of Miami Semmelweis University

    16. Comparison of Peripapillary OCT Angiography Vessel Density and Retinal Nerve Fiber Layer Thickness Measurements for Their Ability to Detect Progression in Glaucoma

      Explore LWW Online Ophthalmology
      Comparison of Peripapillary OCT Angiography Vessel Density and Retinal Nerve Fiber Layer Thickness Measurements for Their Ability to Detect Progression in Glaucoma
      Purpose: The aim of this study was to investigate the applicability of peripapillary optical coherence tomography angiography angioflow vessel density measurements in the retinal nerve fiber layer for the detection of glaucomatous progression and to compare its performance with that of retinal nerve fiber layer thickness (RNFLT) measurements. Methods: Prospective RNFLT and vessel density measurements with the same Angiovue/RTVue-XR instrument were made immediately one after another on 1 eye ...
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      Mentions: Semmelweis University
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  4. About Semmelweis University

    Semmelweis University

    Semmelweis University was founded in 1769 and is the oldest medical school in Hungary. The faculty became an independent medical school after the Second World War and developed into a university that teaches medicine, dentistry, pharmacy, health sciences, health management, and physical education and sport sciences.  The University is named after Ignác Semmelweis (1818-1865), the revolutionary obstetrician who discovered the cause of puerperal fever in the 1840s, and is therefore also known as “the savior of mothers”.   Today, Semmelweis University is widely recognized as one of Europe’s leading centers of medicine and health sciences, combining innovation and a time-tested tradition in three main areas: education, research and health care.

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    2. Evaluation of potential image acquisition pitfalls during optical coherence tomography and their influence on retinal image segmentation
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