Articoli scientifici - novità in oftalmologia

(articoli presenti: 1134)

Optical Coherence Tomography Angiography in Retinal Vascular Diseases and Choroidal Neovascularization


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Optical Coherence Tomography Angiography in Retinal Vascular Diseases and Choroidal Neovascularization


Area Tematica : oct

Combined eye gel containing sodium hyaluronate and xanthan gum for the treatment of the corneal epithelial defect after pterygium surgery


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Combined eye gel containing sodium hyaluronate and xanthan gum for the treatment of the corneal epithelial defect after pterygium surgery


Area Tematica : congiuntiva

ARVO 2015 Annual Meeting Abstracts


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ARVO 2015 Annual Meeting Abstracts


Area Tematica : oct

Improved microcirculation imaging of human skin in vivo using optical microangiography with a correlation mapping mask


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Improved microcirculation imaging of human skin in vivo using optical microangiography with a correlation mapping mask


Area Tematica : oct

Quantitative optical coherence tomography angiography of vascular abnormalities in the living human eye


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Quantitative optical coherence tomography angiography of vascular abnormalities in the living human eye


Area Tematica : oct

Optimization of the split-spectrum amplitude-decorrelation angiography algorithm on a spectral optical coherence tomography system


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Optimization of the split-spectrum amplitude-decorrelation angiography algorithm on a spectral optical coherence tomography system


Area Tematica : oct

Automated choroidal neovascularization detection algorithm for optical coherence tomography angiography


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Automated choroidal neovascularization detection algorithm for optical coherence tomography angiography


Area Tematica : oct

Swept-source OCT Angiography of the Retinal Vasculature using Intensity Differentiation Based OMAG Algorithms


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Swept-source OCT Angiography of the Retinal Vasculature using Intensity Differentiation Based OMAG Algorithms


Area Tematica : oct

Complex differential variance algorithm for optical coherence tomography angiography


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Complex differential variance algorithm for optical coherence tomography angiography


Area Tematica : oct

Technologies for Analyzing the Optic Disc, RNFL, and Macula

Optical Coherence Tomography By Lindsey S. Folio, BSc; Gadi Wollstein, MD; and Joel S. Schuman, MD


 Glaucoma can be characterized as a slowly progressing optic neuropathy that damages the retinal ganglion cells (RGCs) and their axons. This damage causes thinning of the retinal nerve fiber layer (RNFL), leads to cupping of the optic nerve head (ONH), and usually results in observable visual field loss. Because glaucomatous damage is irreversible, early detection is crucial for effective treatment through medical or surgical methods to halt further progression and preserve functional vision.

 Studies have shown that up to half of the RGCs could be damaged before defects are reported on the visual field.1 A more resolute, objective method of identifying glaucoma is therefore needed for at-risk patients. 


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Technologies for Analyzing the Optic Disc, RNFL, and Macula


Area Tematica : glaucoma

ImageJ User Guide


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ImageJ User Guide


Area Tematica : oct

Angio OCT, Dye Less Angiography, A New Approach of Age Related Macular Degeneration (ARMD)


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Angio OCT, Dye Less Angiography, A New Approach of Age Related Macular Degeneration (ARMD)


Area Tematica : oct

Noninvasive Visualization and Analysis of the Human Parafoveal Capillary Network Using Swept Source OCT Optical Microangiography


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Noninvasive Visualization and Analysis of the Human Parafoveal Capillary Network Using Swept Source OCT Optical Microangiography


Area Tematica : oct

Basic Technology and Clinical Applications of the Updated Model of Laser Speckle Flowgraphy to Ocular Diseases


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Basic Technology and Clinical Applications of the Updated Model of Laser Speckle Flowgraphy to Ocular Diseases


Area Tematica : oct

”Great diagnostic potential”


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”Great diagnostic potential”


Area Tematica : oct

ARVO 2015


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ARVO 2015


Area Tematica : oct

OCT angiography by absolute intensity difference applied to normal and diseased human retinas

Abstract: We compare four optical coherence tomography techniques for noninvasive visualization of microcapillary network in the human retina and murine cortex. We perform phantom studies to investigate contrast-tonoise ratio for angiographic images obtained with each of the algorithm. We show that the computationally simplest absolute intensity difference angiographic OCT algorithm that bases only on two cross-sectional intensity images may be successfully used in clinical study of healthy eyes and eyes with diabetic maculopathy and branch retinal vein occlusion. ©2015 Optical Society of America OCIS codes: (110.4500) Optical coherence tomography; (170.4470) Ophthalmology; (170.3880) Medical and biological imaging; (280.2490) Flow diagnostics. 


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OCT angiography by absolute intensity difference applied to normal and diseased human retinas


Area Tematica : oct

Small eyesdbig problems


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Small eyesdbig problems


Area Tematica : malformazioni rare

Image-guided femtosecond laser–assisted cataract surgery in Peters anomaly type 2


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Image-guided femtosecond laser–assisted cataract surgery in Peters anomaly type 2


Area Tematica : cataratta

Single suture iris-to-capsulorhexis fixation for in-the-bag intraocular lens subluxation


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Single suture iris-to-capsulorhexis fixation for in-the-bag intraocular lens subluxation


Area Tematica : cataratta

The X Factors: Three areas that will improve refractive cataract surgery outcomes


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The X Factors: Three areas that will improve refractive cataract surgery outcomes


Area Tematica : cataratta

Step by step: Clinical and practical implementation of laser-assisted cataract surgery


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Step by step: Clinical and practical implementation of laser-assisted cataract surgery


Area Tematica : cataratta

Crossing the finish line: Launching your premium technology practice


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Crossing the finish line: Launching your premium technology practice


Area Tematica : cataratta

ASCRS completes third annual Clinical Survey


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ASCRS completes third annual Clinical Survey


Area Tematica : difetti di vista

Innovating advanced treatments to increase compliance and improve outcomes for glaucoma patients: diagnostics, novel therapies, and surgical options


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Innovating advanced treatments to increase compliance and improve outcomes for glaucoma patients: diagnostics, novel therapies, and surgical options


Area Tematica : glaucoma

Driving laser vision correction outcomes, category growth, and confidence in today’s turbulent environment


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Driving laser vision correction outcomes, category growth, and confidence in today’s turbulent environment


Area Tematica : cataratta

What do the recent technological advancements for femto cataract surgery mean?


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What do the recent technological advancements for femto cataract surgery mean?


Area Tematica : cataratta

Elaborazioni Informatiche

La ricerca svolta nel periodo gennaio-settembre 2011 é composta dalle seguenti attività: 


1. Analisi dello stato dell’arte, in particolare del lavoro svolto nel biennio 2004-2006 dal gruppo coordinato dal Prof. Giovanni Frosoli del Dipartimento di Matematica Applicata dell’Università di Firenze. 

Nella sezione 2 presentiamo una rivisitazione critica di questo lavoro. 

2. Fase preliminare di studio della letteratura, delle tecniche e degli algoritmi esistenti nel campo dell’elaborazione di immagini digitali. 

3. Lavoro di consulenza nelle acquisizioni manuali delle immagini di prova, in particolare per quanto riguarda la calibrazione dei parametri di acquisizione. 

4. Scelta e sviluppo degli algoritmi per l’effettiva elaborazione delle immagini di prova a disposizione. Nella sezione 3 descriveremo in dettaglio i risultati conseguiti. 

5. Prima individuazione delle tecniche statistiche e degli algoritmi di classificazione. 

Nella sezione 4 concluderemo presentando i possibili approcci al momento ipotizzati al problema e definendo lo schema delle successive fasi del lavoro. 


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Elaborazioni Informatiche


Area Tematica : oct

A review of optical coherence tomography angiography (OCTA)


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A review of optical coherence tomography angiography (OCTA)


Area Tematica : oct

Scleretizzazione


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Scleretizzazione


Area Tematica : oct

Correlazioni Lineari


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Correlazioni Lineari


Area Tematica : oct

OCT Angiography: The Newest Frontier for the Revolutionary Technology


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OCT Angiography: The Newest Frontier for the Revolutionary Technology


Area Tematica : oct

Prospective Trial of Treat-and-Extend versus Monthly Dosing for Neovascular Age-Related Macular Degeneration


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Prospective Trial of Treat-and-Extend versus Monthly Dosing for Neovascular Age-Related Macular Degeneration


Area Tematica : maculopatie

Optical Coherence Tomography Angiography of peripapillary retinal blood flow response to Hyperoxia


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Optical Coherence Tomography Angiography of peripapillary retinal blood flow response to Hyperoxia


Area Tematica : oct

Swept-Source Angio OCT


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Swept-Source Angio OCT


Area Tematica : oct

Revue de la littérature 2014-2015Aangio-OCT


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Revue de la littérature 2014-2015Aangio-OCT


Area Tematica : oct

Methods and algorithms for optical coherence tomography-based angiography: a review and comparison


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Methods and algorithms for optical coherence tomography-based angiography: a review and comparison


Area Tematica : oct

Optical Microangiography: A Label Free 3D Imaging Technology to Visualize and Quantify Blood Circulations within Tissue Beds in vivo


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Optical Microangiography: A Label Free 3D Imaging Technology to Visualize and Quantify Blood Circulations within Tissue Beds in vivo


Area Tematica : oct

Comparison of Anterior Segment-Optical Coherence Tomography Parameters in Phacomorphic Angle Closure and Acute Angle Closure Eyes


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Comparison of Anterior Segment-Optical Coherence Tomography Parameters in Phacomorphic Angle Closure and Acute Angle Closure Eyes


Area Tematica : oct

Multifunctional 1050 nm Spectral Domain Oct System at 147 khz for Posterior Eye Imaging


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Multifunctional 1050 nm Spectral Domain Oct System at 147 khz for Posterior Eye Imaging


Area Tematica : oct

Ultra–Short-Term Reproducibility of Speckle-Noise Freed Fluid and Tissue Compartmentalization of the Choroid Analyzed by Standard OCT


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Ultra–Short-Term Reproducibility of Speckle-Noise Freed Fluid and Tissue Compartmentalization of the Choroid Analyzed by Standard OCT


Area Tematica : oct

Advances in Ophthalmologic Imaging


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Advances in Ophthalmologic Imaging


Area Tematica : oct

MULTIMODAL APPROACHES TO MANAGING OCULAR PATHOLOGY Sponsored by Topcon


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MULTIMODAL APPROACHES TO MANAGING OCULAR PATHOLOGY Sponsored by Topcon


Area Tematica : oct

Heidelberg Engineering Announces OCT Angiography –

Heidelberg Engineering Announces OCT Angiography – 

Next Generation Vascular Imaging

Clinical Experience Presented at International Congress on “En face” OCT imaging – Advances in OCT – OCT Angiography (December 12-13, Rome, Italy) 

December 16, 2014 – Heidelberg, Germany – Heidelberg Engineering GmbH demonstrates OCT Angiography for the SPECTRALIS diagnostic imaging platform.
“The SPECTRALIS OCT Angiography provides a three dimensional reconstruction of the perfused microvasculature within the retina and choroid. In contrast to traditional fluorescein and ICG angiography the retinal and choroidal blood flow can be detected without the need to inject any dye and can be analyzed layer-by-layer using the en-face visualization. Although the clinical evaluation of OCT angiography is ongoing, the clinical potential of this new technology is tremendous,” explains Prof. Gabriel Coscas, Paris, France.
The SPECTRALIS OCT Angiography performs sequential OCT cross-sectional scans to detect motion of scattering particles such as erythrocytes within the eye’s vasculature. Key for this technology are high-resolution OCT scans, and the ability to repeatedly measure the same location at the retina.
“The SPECTRALIS system combines a 70 kHz A-scan rate with Heidelberg Engineering’s proprietary TruTrack high-speed active eye tracking, to provide unmatched high-resolution OCT images. With the transverse section analysis the system is able to virtually dissect finest structures of the vasculature non-invasively,“ mentions Dr. Jan Dechent, product manager at Heidelberg Engineering.
The OCT Angiography feature will be based on the recently announced OCT2 module for the SPECTRALIS diagnostic imaging platform. All expandable SPECTRALIS systems, those purchased with the Advanced Upgrade Package or with the MultiColor module, can be upgraded to the OCT2 module and OCT Angiography. The OCT Angiography module is another example of the outstanding SPECTRALIS value proposition to extend the life and function of the equipment, making new and meaningful technological developments available to existing customers.


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Heidelberg Engineering Announces OCT Angiography –


Area Tematica : oct

ZEISS AngioPlex OCT Angiography Overview


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ZEISS AngioPlex OCT Angiography Overview


Area Tematica : oct

OCT Angiography: The Newest Frontier for the Revolutionary Technology


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OCT Angiography: The Newest Frontier for the Revolutionary Technology


Area Tematica : oct

Wide-Field OCT Angiography at 400 KHz Utilizing Spectral Splitting


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Wide-Field OCT Angiography at 400 KHz Utilizing Spectral Splitting


Area Tematica : oct

Optical Coherence Tomography Angiography of Optic Disc Perfusion in Glaucoma


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Optical Coherence Tomography Angiography of Optic Disc Perfusion in Glaucoma


Area Tematica : oct

ZEISS Presents Its New Generation of Vascular Imaging: OCT Angiography

ZEISS Presents Its New Generation of Vascular Imaging: OCT Angiography

Prolific research from ZEISS Medical Technology at the recent 2015 Association for Research in Vision and Ophthalmology (ARVO) Annual Meeting in Denver highlights the company’s standing as the leader in OCT technology and innovation


DUBLIN, CA USA

Nearly two decades ago, ZEISS was the first company to introduce optical coherence tomography (OCT) for clinical use in ophthalmology and optometry. The 20 presentations on OCT angiography by ZEISS and its research collaborators at this year’s ARVO meeting in May are testament to the company’s dedication to continued innovation and advancing the practice of medicine.

ZEISS is developing OCT angiography for both spectral domain (SD) and swept source platforms. The OCT angiography application on the SD platform is currently under FDA review and is 510(k) pending.

“The en face angiograms from the ZEISS SD-OCT angiography prototype show me a detailed picture of the retinal vasculature of the macula. Being able to visualize so quickly areas of macular ischemia in my diabetic retinopathy patients, without the use of a contrast agent, could really help me more easily determine which diabetic macular edema patients are eligible for treatment,” said Professor Jean-Francois Korobelnik, chief of the Ophthalmology Service at the Bordeaux Central University Hospital in Bordeaux, France, who has been conducting investigative research on OCT angiography in collaboration with ZEISS.

OCT Angiography: Improved Visualization
Progression of eye disease in the posterior segment is often accompanied by changes in the retinal vasculature. Fluorescein angiography (FA) has been the gold-standard imaging modality for visualizing such changes. However, FA has two limitations: it requires the use of an injected contrast agent, and it captures the entire retinal vascular volume without the ability to segment imaged features by their depth. 

OCT angiography aims to address these limitations by enabling easy, high-resolution depth resolved visualization of the separate layers of the retinal and choroidal vasculature. Without the need for a contrast agent, OCT angiography offers doctors a quick and relatively low-risk alternative to FA to clearly visualize blood flow. OCT angiography detects motion of scattering particles such as red-blood cells within sequential OCT B-scans performed repeatedly at the same location of the retina. ZEISS is able to utilize its retinal tracking system, FastTrac™, to provide motion-artifact-free images of the perfused retina.

One study presented at ARVO by ZEISS and its research collaborators directly compared OCT angiography (using a prototype based on the CIRRUS HD-OCT 5000) with fluorescein angiography (FA) imaging, in a subject who had diabetic retinopathy. There was a clear correlation between the OCT angiography and fluorescein images, plus OCT angiography was found to reveal much clearer microvascular details. OCT angiography also provided depth resolved information that was not available with FA.

The OCT angiography research from ZEISS at ARVO featured collaboration with researchers from leading institutions, including UCLA, the University of Miami Health System, the University of Southern California and the University of Washington.

“It is an exciting time in ophthalmology with the advent of OCT angiography. It allows us to quickly and comfortably visualize the vasculature of the retina without introducing the risks associated with a contrast agent,” said Giovanni Staurenghi, professor of ophthalmology and chairman of the University Eye Clinic at Luigi Sacco Hospital in Milan, Italy, who is conducting OCT angiography research in conjunction with ZEISS.


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ZEISS Presents Its New Generation of Vascular Imaging: OCT Angiography


Area Tematica : oct

AngioVue Brochure.pdf


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AngioVue Brochure.pdf


Area Tematica : oct

Low-cost laser speckle contrast imaging of blood flow using a webcam


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Low-cost laser speckle contrast imaging of blood flow using a webcam


Area Tematica : oct

Speckle Imaging with the SOAR and the Very Large Telescopes


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Speckle Imaging with the SOAR and the Very Large Telescopes


Area Tematica : oct
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