1. 1-24 of 1414 1 2 3 4 ... 57 58 59 »
    1. ASYMPTOMATIC MULTIFOCAL PARACENTRAL ACUTE MIDDLE MACULOPATHY ASSOCIATED WITH JUVENILE DERMATOMYOSITIS OPTICAL COHERENCE ANGIOGRAPHY FINDINGS

      ASYMPTOMATIC MULTIFOCAL PARACENTRAL ACUTE MIDDLE MACULOPATHY ASSOCIATED WITH JUVENILE DERMATOMYOSITIS OPTICAL COHERENCE ANGIOGRAPHY FINDINGS

      Purpose: To describe a unique presentation of multifocal paracentral acute middle maculopathy in a young patient with juvenile dermatomyositis including optical coherence tomography angiography findings. Methods: Retrospective single case report. Patient: Seventeen-year-old male patient with a history of juvenile dermatomyositis presented for routine hydroxychloroquine screening. Results: Optical coherence tomography revealed undulations of the outer retinal layers and retinal thinning near the fovea in both eyes. Optical coherence tomography angiography revealed loss of flow void densities in the superficial and deep capillary plexi in both eyes. These findings were consistent with a diagnosis of paracentral acute middle maculopathy . Conclusion: To the ...

      Read Full Article
    2. Peripapillary Vessel Density Measured by Optical Coherence Tomography Angiography in Idiopathic Intracranial Hypertension

      Peripapillary Vessel Density Measured by Optical Coherence Tomography Angiography in Idiopathic Intracranial Hypertension

      Background: Although alterations in the peripapillary retinal nerve fiber layer (RNFL) in patients with idiopathic intracranial hypertension (IIH) have been characterized using optical coherence tomography (OCT), there are little data regarding the peripapillary vasculature in this patient population. Our aim was to evaluate findings of OCT angiography (OCT-A) in the peripapillary region in addition to the RNFL measurements on OCT in patients with IIH. Methods: Thirty-eight eyes of 19 patients with IIH and 42 eyes of 21 healthy controls were enrolled in our study. Papilledema was graded according to the Frisen scale. Peripapillary RNFL and vessel density were evaluated with ...

      Read Full Article
    3. Intraoperative Optical Coherence Tomography–Guided Femtosecond Laser–Assisted Deep Anterior Lamellar Keratoplasty

      Intraoperative Optical Coherence Tomography–Guided Femtosecond Laser–Assisted Deep Anterior Lamellar Keratoplasty

      Purpose: To describe the feasibility and outcomes of intraoperative optical coherence tomography (OCT)–guided, femtosecond laser –assisted deep anterior lamellar keratoplasty in which the lamellar and tunnel cuts were completed by laser. Methods: The Ziemer Z8 system was used to scan the corneas intraoperatively and guide the stromal lamellar and tunnel cuts created by the laser. Thirty porcine eyes and 3 human cadaver globes were used to evaluate the accuracy of laser-created intrastromal tunnels and the feasibility of achieving big-bubble pneumatic dissection. The tunnel distance above the Descemet membrane ( D t-dm ) was set at 100 and 130 μm, and the ...

      Read Full Article
    4. Using Deep Learning in Automated Detection of Graft Detachment in Descemet Membrane Endothelial Keratoplasty: A Pilot Study

      Using Deep Learning in Automated Detection of Graft Detachment in Descemet Membrane Endothelial Keratoplasty: A Pilot Study

      Purpose: To evaluate a deep learning –based method to automatically detect graft detachment (GD) after Descemet membrane endothelial keratoplasty (DMEK) in anterior segment optical coherence tomography (AS-OCT). Methods: In this study, a total of 1172 AS-OCT images (609: attached graft; 563: detached graft) were used to train and test a deep convolutional neural network to automatically detect GD after DMEK surgery in AS-OCT images. GD was defined as a not completely attached graft. After training with 1072 of these images (559: attached graft; 513: detached graft), the created classifier was tested with the remaining 100 AS-OCT scans (50: attached graft ...

      Read Full Article
    5. CHOROIDAL NEOVASCULAR AREA AND VESSEL DENSITY COMPARISON BETWEEN TWO SWEPT-SOURCE OPTICAL COHERENCE TOMOGRAPHY ANGIOGRAPHY DEVICES

      CHOROIDAL NEOVASCULAR AREA AND VESSEL DENSITY COMPARISON BETWEEN TWO SWEPT-SOURCE OPTICAL COHERENCE TOMOGRAPHY ANGIOGRAPHY DEVICES

      Purpose: To compare choroidal neovascularization (CNV) area and vessel density (VD) measurements between two different swept-source optical coherence tomography angiography (SS-OCTA) devices. Methods: En face optical coherence tomography angiography (OCTA) images of patients affected by neovascular age-related macular degeneration were collected prospectively from two devices: Zeiss PLEX Elite 9000 (Carl Zeiss Meditec, Dublin, CA) and Topcon DRI OCT Triton SS-OCTA (Topcon, Tokyo, Japan). Choroidal neovascularization area and VD of images were measured and analyzed with ImageJ software by two readers to evaluate the agreement between two devices, with respect to different image size (3 × 3 and 6 × 6 mm) and ...

      Read Full Article
    6. Branch Retinal Vein Occlusion Secondary To A Retinal Arteriolar Macroaneurysm: A Novel Mechanism Supported By Multimodal Imaging

      Branch Retinal Vein Occlusion Secondary To A Retinal Arteriolar Macroaneurysm: A Novel Mechanism Supported By Multimodal Imaging

      Background/Purpose: To report a case of a branch retinal vein occlusion secondary to a retinal arteriolar macroaneurysm (RAM). Methods: Retrospective case report describing examination findings, treatment outcome and unique multimodal imaging features demonstrated on fluorescein angiography, optical coherence tomography, optical coherence tomography angiography and adaptive optics photography of the retinal vessels and RAM. Results: A 61-year-old man presented with 20/200 vision in the right eye because of a branch retinal vein occlusion secondary to a RAM. After sector panretinal photocoagulation and a course of 24 intravitreal antivascular endothelial growth factor injections over 4 years, visual acuity improved to ...

      Read Full Article
    7. QUANTIFICATION OF RETINAL CAPILLARY NONPERFUSION IN DIABETICS USING WIDE-FIELD OPTICAL COHERENCE TOMOGRAPHY ANGIOGRAPHY

      QUANTIFICATION OF RETINAL CAPILLARY NONPERFUSION IN DIABETICS USING WIDE-FIELD OPTICAL COHERENCE TOMOGRAPHY ANGIOGRAPHY

      Purpose: To combine advances in high-speed, wide-field optical coherence tomography angiography ( OCTA ) with image processing methods for semiautomatic quantitative analysis of capillary nonperfusion in patients with diabetic retinopathy (DR). Methods: Sixty-eight diabetic patients (73 eyes), either without retinopathy or with different degrees of retinopathy, were prospectively recruited for volumetric swept-source OCTA imaging using 12 mm × 12 mm fields centered at the fovea. A custom, semiautomatic software algorithm was used to quantify areas of capillary nonperfusion . Results: The mean percentage of nonperfused area was 0.1% (95% confidence interval: 0.0–0.4) in the eyes without DR; 2.1% (95 ...

      Read Full Article
    8. Optical coherence tomography angiography in glaucoma

      Optical coherence tomography angiography in glaucoma

      Purpose of review Optical coherence tomography angiography (OCTA) studies have demonstrated reduced microcirculation in the superficial optic nerve, peripapillary retina, and the macula of glaucoma patients. The scope of this review is to outline recent studies using OCTA in glaucoma and highlight how OCTA may help improve diagnosis and follow-up in glaucoma patients. Recent findings OCTA studies have provided evidence of vascular changes in the optic nerve head, peripapillary, and macula region in glaucoma in comparison to glaucoma suspects and normal eyes. Additionally, OCTA can detect longitudinal reduction of peripapillary and macula vessel density in glaucoma patients. It remains unclear ...

      Read Full Article
    9. Vascular Abnormalities In Diabetic Retinopathy Assessed With SWEPT-SOURCE Optical Coherence Tomography Angiography Widefield Imaging

      Vascular Abnormalities In Diabetic Retinopathy Assessed With SWEPT-SOURCE Optical Coherence Tomography Angiography Widefield Imaging

      Purpose: To detect vascular abnormalities in diabetic retinopathy using swept-source optical coherence tomography angiography (SS-OCTA) widefield images, and to compare the findings with color fundus photographs (CFPs) using Early Treatment Diabetic Retinopathy Study severity grading. Methods: 3 mm × 3 mm and 12 mm × 12 mm scans were acquired to cover 70° to 80° of the posterior pole using a 100-kHz SS-OCTA instrument. Two masked graders assessed the presence of vascular abnormalities on SS-OCTA and the Early Treatment Diabetic Retinopathy Study level on CFP. The grading results were then compared. Results: A total of 120 diabetic eyes (60 patients) were imaged ...

      Read Full Article
    10. Multimodal Imaging During The Evolution Of Blood–Brain Barrier Disruption Maculopathy

      Multimodal Imaging During The Evolution Of Blood–Brain Barrier Disruption Maculopathy

      Purpose: To highlight the course of blood–brain barrier disruption maculopathy in a patient with successfully managed relapsed central nervous system lymphoma . Methods: Case report with fundus autofluorescence and optical coherence tomography imaging, and literature review. Results: A 57-year-old patient diagnosed with central nervous system large B-cell lymphoma had a normal ophthalmic evaluation on his first visit. Subsequently, when his malignancy recurred locally, he was started on blood–brain barrier disruption therapy and intraarterial methotrexate. During the course of the therapy, he developed bilateral retinal pigment epithelial abnormalities located in the foveal and perifoveal zones. The changes were first mildly ...

      Read Full Article
    11. New Findings From Multimodal Fundus Imaging Over 3 Years Of A Patient With Microcephaly, Chorioretinopathy, And KIF11 MUTATION

      New Findings From Multimodal Fundus Imaging Over 3 Years Of A Patient With Microcephaly, Chorioretinopathy, And KIF11 MUTATION

      Purpose: To describe ocular features and long-term follow-up in a patient with microcephaly , chorioretinopathy , and KIF11 mutation. Methods: Multimodal imaging including fundus color photography, autofluorescence, spectral-domain optical coherence tomography, visual fields, electrophysiologic assessment, and neuroimaging. Results: A 44-year-old man with microcephaly and long-standing poor vision in his right eye presented for general ophthalmic review. Fundus examination revealed bilateral, symmetrical, inferior, atrophic chorioretinal lacunae, outer retinal and retinal pigment epithelial atrophy, curvilinear streaks, and retinal arteriolar sheathing. These findings were documented over a 3-year period by multimodal imaging and showed slow progressive deterioration in visual acuity, visual field testing, and fundus ...

      Read Full Article
    12. Optical coherence tomography guided successful treatment without stent implantation in a patient with non-ST-segment elevation myocardial infarction caused by plaque rapture

      Optical coherence tomography guided successful treatment without stent implantation in a patient with non-ST-segment elevation myocardial infarction caused by plaque rapture

      Rationale: Primary percutaneous coronary intervention (PPCI) with immediate stenting provides effective revascularization. While the risks of no-reflow, stent thrombosis, stent undersizing, and malapposition reduced the benefits in patients with high burden thrombosis. Intravascular imaging, especially optical coherence tomography (OCT), offers potential in optimization of percutaneous coronary intervention. Patient concerns: A 51-year-old male underwent coronary angiography (CAG) due to chest pain with minimal ST-segment depression of the electrocardiogram. Diagnoses: Urgent CAG revealed burden thrombus in the mid left anterior descending coronary artery (LAD) with TIMI grade I distal flow. Interventions: After aspiration thrombectomy, OCT was used to evaluate the target lesion ...

      Read Full Article
    13. QUANTIFICATION OF CHOROIDAL VASCULATURE BY HIGH-QUALITY STRUCTURE EN FACE SWEPT-SOURCE OPTICAL COHERENCE TOMOGRAPHY IMAGES IN EYES WITH CENTRAL SEROUS CHORIORETINOPATHY

      QUANTIFICATION OF CHOROIDAL VASCULATURE BY HIGH-QUALITY STRUCTURE EN FACE SWEPT-SOURCE OPTICAL COHERENCE TOMOGRAPHY IMAGES IN EYES WITH CENTRAL SEROUS CHORIORETINOPATHY

      Purpose: To determine the density of the choroidal vasculature by high-quality structure en face optical coherence tomography (OCT) scanned at the same time as OCT angiography in eyes with central serous chorioretinopathy (CSC). Methods: Thirty-five eyes of 30 patients with CSC (20 men and 10 women; average age, 48.4 years) were studied. Volume scans (12 × 12 mm-square) were obtained at the same time as OCT angiographic scans (Plex Elite 9000; Swept-Source OCT, Zeiss). High-quality structure en face images were flattened at Bruch membrane and binarized to identify and quantify the choroidal vascular density by the Bernsen method of the ...

      Read Full Article
      Mentions: Hideki Koizumi
    14. VESSEL DENSITY OF SUPERFICIAL, INTERMEDIATE, AND DEEP CAPILLARY PLEXUSES USING OPTICAL COHERENCE TOMOGRAPHY ANGIOGRAPHY

      VESSEL DENSITY OF SUPERFICIAL, INTERMEDIATE, AND DEEP CAPILLARY PLEXUSES USING OPTICAL COHERENCE TOMOGRAPHY ANGIOGRAPHY

      Purpose: To provide values of retinal vessel density (VD) in the three retinal capillary plexuses, foveal avascular zone (FAZ) area, and retinal layer thickness in a cohort of healthy subjects. Methods: The optical coherence tomography angiography maps of 148 eyes of 84 healthy subjects, aged 22 to 76 years, were analyzed for measuring VD of the retinal capillary plexuses, using the Optovue device comprising a projection artifact removal algorithm. Foveal avascular zone metrics were measured, and the relationship between optical coherence tomography angiography findings and age, sex, and image quality was studied. Results: The deep capillary plexus showed the lowest ...

      Read Full Article
    15. COMPARATIVE EVALUATION OF ANTERIOR SEGMENT OPTICAL COHERENCE TOMOGRAPHY, ULTRASOUND BIOMICROSCOPY, AND INTRAOCULAR PRESSURE CHANGES AFTER PANRETINAL PHOTOCOAGULATION BY PASCAL AND CONVENTIONAL LASER

      COMPARATIVE EVALUATION OF ANTERIOR SEGMENT OPTICAL COHERENCE TOMOGRAPHY, ULTRASOUND BIOMICROSCOPY, AND INTRAOCULAR PRESSURE CHANGES AFTER PANRETINAL PHOTOCOAGULATION BY PASCAL AND CONVENTIONAL LASER

      Purpose: To compare intraocular pressure, anterior segment optical coherence tomography, and ultrasound biomicroscopy parameters over 3 months after panretinal photocoagulation (PRP) for proliferative diabetic retinopathy after 1 of 2 sittings by conventional laser (half PRP) and a single sitting of Pattern Scan Laser (PASCAL) PRP. Methods: This was a prospective, randomized, interventional study. All tests were performed at baseline, and at 1, 6, and 24 hours, and 1, 4, 8, and 12 weeks after PRP. Results: The intraocular pressure at 1 hour and 6 hours after PRP was significantly raised in both groups. Mean intraocular pressure was 21.17 ± 4 ...

      Read Full Article
    16. Determining Optic Nerve Cupping Using Optical Coherence Tomography (OCT) versus a New Electronic Mobile Device

      Determining Optic Nerve Cupping Using Optical Coherence Tomography (OCT) versus a New Electronic Mobile Device

      Purpose: We present a new device that may aid in glaucoma screening. The vertical cup-to-disc ratio (CDR) obtained from a new electronic mobile device (EMD) were compared to those obtained from a spectral domain optical coherence tomography (sdOCT). In addition, results from examiner’s evaluations were compared to the results mentioned above. Methods: A single-masked study was performed to evaluate the CDR results from 110 eyes from 110 subjects between ages 18 to 60 years old (39±13▒y old), of which 66 (60%) were female. Vertical CDR was analyzed five times with each device in a single visit and ...

      Read Full Article
    17. Calcified neoatherosclerosis causing in-stent restenosis: prevalence, predictors, and implications

      Calcified neoatherosclerosis causing in-stent restenosis: prevalence, predictors, and implications

      Background Neoatherosclerosis has emerged as a major cause of in-stent restenosis (ISR). Although this entity has been described as a unique process, optical coherence tomography (OCT) enables depiction of distinct morphologic patterns, including the presence of calcified sheets within the stent. We sought to assess prevalence, predictors, and implications of calcified neoatherosclerosis (cNA) as the cause of ISR. Methods and results From January 2014 to August 2016, 75 consecutive patients with 81 ISR lesions with a clinical indication for revascularization were evaluated by OCT before reintervention. In 13 (16%) lesions, cNA was the predominant pattern of ISR, all of them ...

      Read Full Article
      Mentions: Fernando Alfonso
    18. Influence of Posterior Subcapsular Cataract on Structural OCT and OCT Angiography Vessel Density Measurements in the Peripapillary Retina

      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 the image quality scores were compared, respectively. Results: PSC grade (mean±SD) was 4.0±0.9, and best corrected visual acuity (BCVA) was 0.8±0.2. Image quality ...

      Read Full Article
    1-24 of 1414 1 2 3 4 ... 57 58 59 »
  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