1. Articles from Martin S. Zinkernagel

    1-14 of 14
    1. Spectral-Domain Optical Coherence Tomography Associations of Neovascular Conversion in Age-Related Macular Degeneration

      Spectral-Domain Optical Coherence Tomography Associations of Neovascular Conversion in Age-Related Macular Degeneration

      Purpose: To identify spectral-domain optical coherence tomography (SD-OCT) features associated with exudative conversion in fellow eyes of patients treated for neovascular age-related macular degeneration (nAMD) in their first eye. Methods: Retrospective observational study. Spectral-domain optical coherence tomography images of converting fellow eyes (study eyes) from 83 patients with nAMD were compared to fellow eyes of age- and sex-matched patients with nAMD who did not convert (control eyes). Parameters related to drusen, pigment epithelium detachment, hyperreflective foci (HRF), retinal pigment epithelium atrophy, small cystic cavities, and vitreoretinal interface were graded. Longitudinal analysis in study eyes and cross-sectional comparison with control eyes ...

      Read Full Article
    2. In Vivo Imaging of Cx3cr1gfp/gfp Reporter Mice with Spectral-domain Optical Coherence Tomography and Scanning Laser Ophthalmoscopy

      In Vivo Imaging of Cx3cr1gfp/gfp Reporter Mice with Spectral-domain Optical Coherence Tomography and Scanning Laser Ophthalmoscopy

      Spectral domain optical coherence tomography (SD-OCT) and scanning laser ophthalmoscopy (SLO) are extensively used in experimental ophthalmology. In the present protocol, mice expressing green fluorescent protein (gfp) under the promoter of Cx3cr1 (BALB/c-Cx3cr1 gfp/gfp ) were used to image microglia cells in vivo in the retina. Microglia are resident macrophages of the retina and have been implicated in several retinal diseases 1 , 2 , 3 , 4 , 5 , 6 . This protocol provides a detailed approach for generation of retinal B-scans, with SD-OCT, and imaging of microglia cell distribution in Cx3cr1 gfp/gfp mice with SLO in vivo, using an ophthalmic imaging ...

      Read Full Article
    3. In Vivo Imaging of Cx3cr1 Reporter Mice with Spectral-domain Optical Coherence Tomography ...

      In Vivo Imaging of Cx3cr1 Reporter Mice with Spectral-domain Optical Coherence Tomography ...

      This protocol describes how high-resolution imaging techniques such as spectral domain optical coherence tomography and scanning laser ophthalmoscopy can be utilized in small rodents, using an ophthalmic imaging platform system, to obtain information on retinal thickness and microglial cell distribution, respectively.

      Read Full Article
    4. OCT-angiography: A qualitative and quantitative comparison of 4 OCT-A devices

      OCT-angiography: A qualitative and quantitative comparison of 4 OCT-A devices

      Article Authors Metrics Comments Related Content Abstract Introduction Methods Results Discussion Supporting information Acknowledgments Author Contributions References Reader Comments (0) Media Coverage Figures Abstract Purpose To compare the quality of four OCT-angiography(OCT-A) modules. Method The retina of nineteen healthy volunteers were scanned with four OCT-devices (Topcon DRI-OCT Triton Swept-source OCT, Optovue RTVue-XR, a prototype Spectralis OCT2, Heidelberg-Engineering and Zeiss Cirrus 5000-HD-OCT). The device-software generated en-face OCT-A images of the superficial (SCP) and deep capillary plexuses (DCP) were evaluated and scored by 3 independent retinal imaging experts. The SCP vessel density was assessed using Angiotool-software. After the inter-grader reliability assessment ...

      Read Full Article
    5. OPTICAL COHERENCE TOMOGRAPHY ANGIOGRAPHY FEATURES OF TORPEDO MACULOPATHY

      OPTICAL COHERENCE TOMOGRAPHY ANGIOGRAPHY FEATURES OF TORPEDO MACULOPATHY

      Background/Purpose: To investigate the retinal and choroidal vasculature in patients with torpedo maculopathy with optical coherence tomography-angiography (OCT-A). Methods: Retrospective case series of four patients who were examined at the department of Ophthalmology at the University Hospital Bern. Main Outcome was the lesion size over time in OCT-A and fundus autofluorescence. Results: Three patients had Type I and 1 patient had Type II torpedo maculopathy. Torpedo maculopathy lesion size remained stable in all patients over a mean period of observation of three years in OCT-A and fundus autofluorescence. The choriocapillaris network was attenuated focally within the lesion in OCT-A ...

      Read Full Article
    6. Imaging of macrophage dynamics with optical coherence tomography in anterior ischemic optic neuropathy

      Imaging of macrophage dynamics with optical coherence tomography in anterior ischemic optic neuropathy

      Anterior ischemic optic neuropathy (AION) is a relatively common cause of visual loss and results from hypoperfusion of the small arteries of the anterior portion of the optic nerve. AION is the leading cause of sudden optic nerve related vision loss with approximately 10 cases per 100′000 in the population over 50 years. To date there is no established treatment for AION and therefore a better understanding of the events occurring at the level of the optic nerve head (ONH) would be important to design future therapeutic strategies. The optical properties of the eye allow the imaging of the ...

      Read Full Article
    7. Optical Coherence Tomography Angiography in Mice: Comparison with Confocal Scanning Laser Microscopy and Fluorescein Angiography

      Optical Coherence Tomography Angiography in Mice: Comparison with Confocal Scanning Laser Microscopy and Fluorescein Angiography

      Purpose : Optical coherence tomography angiography (OCT-A) allows noninvasive visualization of retinal vessels in vivo. OCT-A was used to characterize the vascular network of the mouse retina and was compared with fluorescein angiography (FA) and histology. Methods : In the present study, OCT-A based on a Heidelberg Engineering Spectralis system was used to investigate the vascular network in mice. Data was compared with FA and confocal microscopy of flat-mount histology stained with isolectin IB4. For quantitative analysis the National Cancer Institute's AngioTool software was used. Vessel density, the number of vessel junctions, and endpoints were measured and compared between the imaging ...

      Read Full Article
    8. Relationship Between Presumptive Inner Nuclear Layer Thickness and Geographic Atrophy Progression in Age-Related Macular Degeneration

      Relationship Between Presumptive Inner Nuclear Layer Thickness and Geographic Atrophy Progression in Age-Related Macular Degeneration

      Purpose : To analyze inner retinal changes in patients with geographic atrophy (GA) secondary to age-related macular degeneration and identify morphological cues for progression. Methods : A total of 100 eyes with GA were assessed in this longitudinal, observational case series. Patients with GA and absent confounding pathology were compared with age-matched controls. The retinal layers on spectral-domain optical coherence tomography, acquired in tracking mode, were segmented manually on central scans through the fixation point. Zones of GA were defined based on choroidal signal enhancement from retinal pigment epithelium loss. An area of unaffected temporal retina was used for comparison. Progression of ...

      Read Full Article
    9. Quantitative Analysis of Mouse Retinal Layers Using Automated Segmentation of Spectral Domain Optical Coherence Tomography Images

      Quantitative Analysis of Mouse Retinal Layers Using Automated Segmentation of Spectral Domain Optical Coherence Tomography Images

      Purpose : Quantification of retinal layers using automated segmentation of optical coherence tomography (OCT) images allows for longitudinal studies of retinal and neurological disorders in mice. The purpose of this study was to compare the performance of automated retinal layer segmentation algorithms with data from manual segmentation in mice using the Spectralis OCT. Methods : Spectral domain OCT images from 55 mice from three different mouse strains were analyzed in total. The OCT scans from 22 C57Bl/6, 22 BALBc, and 11 C3A.Cg- Pde6b + Prph2 Rd2 /J mice were automatically segmented using three commercially available automated retinal segmentation algorithms and compared ...

      Read Full Article
    10. Metrics of the normal anterior sclera: imaging with optical coherence tomography

      Metrics of the normal anterior sclera: imaging with optical coherence tomography

      Background To investigate anterior scleral thickness in a cohort of healthy subjects using enhanced depth imaging anterior segment optical coherence tomography. Methods Observational case series. The mean scleral thickness in the inferonasal, inferotemporal, superotemporal, and superonasal quadrant was measured 2 mm from the scleral spur on optical coherence tomography in healthy volunteers. Results Fifty-three eyes of 53 Caucasian patients (25 male and 28 female) with an average age of 48.6 years (range: 18 to 92 years) were analysed. The mean scleral thickness was 571 μm (SD 84 μm) in the inferonasal quadrant, 511 μm (SD 80 μm) in the ...

      Read Full Article
    11. Enhanced-depth optical coherence tomography for imaging horizontal rectus muscles in Graves’ orbitopathy

      Enhanced-depth optical coherence tomography for imaging horizontal rectus muscles in Graves’ orbitopathy

      Graves’ orbitopathy (GO) is an extraocular eye disease with symptoms ranging from minor discomfort from dry eyes to strabismus and visual loss. One of the hallmarks of active GO is visible hyperemia at the insertion of the extraocular muscles. The aim of the present study was to evaluate the use of enhanced-depth imaging spectral domain anterior segment optical coherence tomography (EDI SD AS-OCT) for detecting pathological changes in horizontal recti muscles of patients with GO. Methods Prospective cross sectional study of 27 eyes. Only women were included. EDI AS-OCT was used to measure the thickness of the tendons of the ...

      Read Full Article
    12. Enhanced-depth optical coherence tomography for imaging horizontal rectus muscles in Graves' orbitopathy

      Enhanced-depth optical coherence tomography for imaging horizontal rectus muscles in Graves' orbitopathy

      Purpose Graves’ orbitopathy (GO) is an extraocular eye disease with symptoms ranging from minor discomfort from dry eyes to strabismus and visual loss. One of the hallmarks of active GO is visible hyperemia at the insertion of the extraocular muscles. The aim of the present study was to evaluate the use of enhanced-depth imaging spectral domain anterior segment optical coherence tomography (EDI SD AS-OCT) for detecting pathological changes in horizontal recti muscles of patients with GO. Methods Prospective cross sectional study of 27 eyes. Only women were included. EDI AS-OCT was used to measure the thickness of the tendons of ...

      Read Full Article
    13. Investigation of Retinal Morphology Alterations Using Spectral Domain Optical Coherence Tomography in a Mouse Model of Retinal Branch and Central Retinal Vein Occlusion

      Investigation of Retinal Morphology Alterations Using Spectral Domain Optical Coherence Tomography in a Mouse Model of Retinal Branch and Central Retinal Vein Occlusion

      Retinal vein occlusion is a leading cause of visual impairment. Experimental models of this condition based on laser photocoagulation of retinal veins have been described and extensively exploited in mammals and larger rodents such as the rat. However, few reports exist on the use of this paradigm in the mouse. The objective of this study was to investigate a model of branch and central retinal vein occlusion in the mouse and characterize in vivo longitudinal retinal morphology alterations using spectral domain optical coherence tomography. Retinal veins were experimentally occluded using laser photocoagulation after intravenous application of Rose Bengal, a photo-activator ...

      Read Full Article
    14. Senile scleral plaques imaged with enhanced depth optical coherence tomography

      Senile scleral plaques imaged with enhanced depth optical coherence tomography

      Purpose Senile scleral plaques (SSP) are sharply demarcated greyish areas located just anterior to the insertions of the horizontal rectus muscles and thus are frequently encountered during transscleral intravitreal injections. The aim of this study was to characterize SSP using enhanced depth imaging spectral domain anterior segment optical coherence tomography (OCT) in a cohort of patients attending intravitreal injection clinics. Methods Prospective cross-sectional study of 380 patients attending the clinic for intravitreal injections at the Department of Ophthalmology at the Bern University Hospital. Thirty-two patients with SSP were identified and the anatomical features were assessed using anterior segment OCT. Results ...

      Read Full Article
    1-14 of 14
  1. Categories

    1. Applications:

      Art, Cardiology, Dentistry, Dermatology, Developmental Biology, Gastroenterology, Gynecology, Microscopy, NDE/NDT, Neurology, Oncology, Ophthalmology, Other Non-Medical, Otolaryngology, Pulmonology, Urology
    2. Business News:

      Acquisition, Clinical Trials, Funding, Other Business News, Partnership, Patents
    3. Technology:

      Broadband Sources, Probes, Tunable Sources
    4. Miscellaneous:

      Jobs & Studentships, Student Theses, Textbooks
  2. Topics in the News

    1. (14 articles) Martin S. Zinkernagel
    2. (13 articles) Bern University Hospital
    3. (10 articles) University of Bern
    4. (6 articles) Sebastian Wolf
    5. (2 articles) Heidelberg Engineering
    6. (2 articles) Academic Medical Center at the University of Amsterdam
    7. (2 articles) Jean J. M. C. H. de la Rosette
    8. (1 articles) National Cancer Institute
    9. (1 articles) Optovue
    10. (1 articles) Nidek
    11. (1 articles) Topcon Medical Systems
    12. (1 articles) Heidelberg Spectralis
    13. (1 articles) Case Western Reserve University
    14. (1 articles) University of Washington
    15. (1 articles) Brigham and Women’s Hospital
    16. (1 articles) Daniël M. de Bruin
    17. (1 articles) Ton G. van Leeuwen
    18. (1 articles) Theo M. de Reijke
    19. (1 articles) Juan Luis Gutiérrez-Chico
    20. (1 articles) Optovue RTVue-100
  3. Popular Articles

  4. Picture Gallery

    Senile scleral plaques imaged with enhanced depth optical coherence tomography Investigation of Retinal Morphology Alterations Using Spectral Domain Optical Coherence Tomography in a Mouse Model of Retinal Branch and Central Retinal Vein Occlusion Enhanced-depth optical coherence tomography for imaging horizontal rectus muscles in Graves' orbitopathy Enhanced-depth optical coherence tomography for imaging horizontal rectus muscles in Graves’ orbitopathy Metrics of the normal anterior sclera: imaging with optical coherence tomography Quantitative Analysis of Mouse Retinal Layers Using Automated Segmentation of Spectral Domain Optical Coherence Tomography Images Relationship Between Presumptive Inner Nuclear Layer Thickness and Geographic Atrophy Progression in Age-Related Macular Degeneration Optical Coherence Tomography Angiography in Mice: Comparison with Confocal Scanning Laser Microscopy and Fluorescein Angiography OPTICAL COHERENCE TOMOGRAPHY ANGIOGRAPHY FEATURES OF TORPEDO MACULOPATHY OCT-angiography: A qualitative and quantitative comparison of 4 OCT-A devices Functional optical coherence tomography of neurovascular coupling interactions in the retina Emerging Applications of Optical Coherence Tomography Angiography (OCTA) in neurological research