scholarly journals Is Optical Coherence Tomography a Useful Tool to Objectively Detect Actual Posterior Vitreous Adhesion Status?

2016 ◽  
Vol 2016 ◽  
pp. 1-5
Author(s):  
Thomas Bertelmann ◽  
Christina Goos ◽  
Walter Sekundo ◽  
Stephan Schulze ◽  
Stefan Mennel
Keyword(s):  
Case Report ◽  
Posterior Vitreous Detachment ◽  
Objective Method ◽  
Review Of The Literature ◽  
Swept Source ◽  
Vitreous Cortex ◽  
Bursa Premacularis ◽  
Swept Source Oct ◽  
Oct Imaging ◽  
Posterior Vitreous Cortex

Purpose. To objectively detect true posterior vitreous cortex (PVC) adhesion status using a commercially available swept-source OCT device (DRI OCT-1, Atlantis©). Material and Methods. Case report, review of the literature, and methodical discussion of concepts to improve OCT-guided PVC imaging. Results. Standard OCT imaging misdiagnosed PVC adhesion status as totally detached in this case report when using a horizontal 6 mm scan only. Contrariwise imaging the same eye with a 12 mm horizontal scan, partial posterior vitreous detachment (PVD) and the presence of a bursa premacularis were clearly discernible. Besides a broader scan, specific scan patterns, highest resolution, and contrast sensitivity, an anterior-to-posterior adjusted scan through the entire vitreous as well as the detection of characteristic undulating aftermovements might enhance the capability of OCT imaging to detect true PVC adhesion status. Conclusions. Further developments are needed to address these issues and to establish OCT recordings as the standard and objective method of choice in PVC adhesion status imaging.

scholarly journals Spectral-Domain and Swept-Source OCT Imaging of Asteroid Hyalosis: A Case Report

2014 ◽  
Vol 45 (5) ◽  
pp. 459-461 ◽  
Author(s):  
Tarek Alasil ◽  
Mehreen Adhi ◽  
Jonathan J. Liu ◽  
James G. Fujimoto ◽  
Jay S. Duker ◽  
...  
Keyword(s):  
Case Report ◽  
Spectral Domain ◽  
Swept Source ◽  
Asteroid Hyalosis ◽  
Swept Source Oct ◽  
Oct Imaging

scholarly journals Feasibility of peripheral OCT imaging using a novel integrated SLO ultra-widefield imaging swept-source OCT device

2021 ◽  
Author(s):  
Simrat K. Sodhi ◽  
John Golding ◽  
Carmelina Trimboli ◽  
Netan Choudhry
Keyword(s):  
Posterior Pole ◽  
Field Of View ◽  
Retinal Diseases ◽  
Swept Source ◽  
Full Field ◽  
Swept Source Oct ◽  
Oct Imaging ◽  
Field Device ◽  
Areas Of Interest ◽  
Retinal Pathologies

Abstract Purpose To describe the feasibility of peripheral OCT imaging in retinal diseases using a novel full-field device. Methods A total of 134 consecutive eyes were referred and imaged on the Optos Silverstone swept-source OCT (SS-OCT) (Optos PLC; Dunfermline, UK). Scanning laser ophthalmoscope (SLO) images and the associated SS-OCT images were obtained in the posterior pole, mid-periphery or far periphery based on the nature of the referral and on new areas of interest observed in the optomap images at the time of imaging. Results A total of 134 eyes (96 patients) were enrolled in the study. One hundred and twenty-five eyes (91 patients) with 38 retinal pathologies were prospectively assessed and 9 eyes (5 patients) were excluded due to incomplete image acquisition. The average age of the subjects was 54 years (range 21–92 years). Thirty-nine out of 125 eyes (31%) had macular pathologies. Eighty-six out of 125 eyes (69%) had peripheral only pathologies, an area which cannot be visualized by standard OCT devices with a 50 degree field-of-view. Conclusions The ability to capture peripheral pathologies using an integrated SLO-UWF imaging with full-field swept-source provided high-grade anatomical insight that confirmed the medical and surgical management in a majority of cases. Its use in the mid- and far periphery provides a holistic clinical picture, which can potentially aid in the understanding of various retinal pathologies.

Correlations between Choriocapillaris Flow Deficits around Geographic Atrophy and Enlargement Rates Based on Swept-Source OCT Imaging

2019 ◽  
Vol 3 (6) ◽  
pp. 478-488 ◽  
Author(s):  
Marie Thulliez ◽  
Qinqin Zhang ◽  
Yingying Shi ◽  
Hao Zhou ◽  
Zhongdi Chu ◽  
...  
Keyword(s):  
Geographic Atrophy ◽  
Swept Source ◽  
Swept Source Oct ◽  
Oct Imaging

Swept-Source OCT Imaging of the Argus II Epiretinal Prosthesis

2018 ◽  
Vol 2 (4) ◽  
pp. 380-382 ◽  
Author(s):  
Marianeli Rodriguez ◽  
Ninel Z. Gregori ◽  
Luiz Roisman ◽  
Byron L. Lam ◽  
Philip J. Rosenfeld
Keyword(s):  
Swept Source ◽  
Swept Source Oct ◽  
Argus Ii ◽  
Oct Imaging ◽  
Epiretinal Prosthesis

scholarly journals Evaluating posterior vitreous detachment by widefield 23-mm swept-source optical coherence tomography imaging in healthy subjects

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Yoshiaki Chiku ◽  
Takao Hirano ◽  
Yoshiaki Takahashi ◽  
Ayako Tuchiya ◽  
Marie Nakamura ◽  
...  
Keyword(s):  
Optical Coherence Tomography ◽  
Healthy Subjects ◽  
Posterior Vitreous Detachment ◽  
Internal Limiting Membrane ◽  
Optical Coherence ◽  
Swept Source ◽  
Vitreous Detachment ◽  
Swept Source Oct ◽  
B Scan Images ◽  
Sd Oct

AbstractPosterior vitreous detachment (PVD) is a separation between the posterior vitreous cortex and internal limiting membrane. Although PVD was historically considered an acute event, recent studies using spectral-domain optical coherence tomography (SD-OCT) revealed a gradual progression of PVD in healthy subjects. Although SD-OCT improved PVD studies, the narrow imaging angle and long examination time were problematic to allow wide angle capture. The Xephilio OCT-S1 (Canon), a swept-source OCT (SS-OCT) device, can obtain up to 23-mm of widefield B-scan images in a single acquisition. We used this widefield SS-OCT to quantitatively evaluate the PVD stage in 214 healthy subjects aged 4–89 years and determine whether PVD stages differ between the bilateral eyes of each patient. Age was significantly positively correlated with the overall PVD stage (ρ = 0.7520, P < 0.001). Interestingly, partial PVD occurred in children as young as 5 years, indicating that initial PVD onset may occur much earlier than previously reported. Furthermore, PVD stages of the bilateral eyes were highly consistent in 183 subjects (85.5%). Widefield 23-mm SS-OCT thus revealed that PVD started earlier than anticipated, and age was correlated with the symmetry of PVD stage. Widefield 23-mm SS-OCT may also be clinically useful for the evaluation of diseased eyes.

scholarly journals Evaluating Posterior Vitreous Detachment By Widefield 23-mm Swept-Source Optical Coherence Tomography Imaging In Healthy Subjects

2021 ◽  
Author(s):  
Yoshiaki Chiku ◽  
Takao Hirano ◽  
Yoshiaki Takahashi ◽  
Ayako Tuchiya ◽  
Marie Nakamura ◽  
...  
Keyword(s):  
Optical Coherence Tomography ◽  
Healthy Subjects ◽  
Posterior Vitreous Detachment ◽  
Internal Limiting Membrane ◽  
Optical Coherence ◽  
Swept Source ◽  
Vitreous Detachment ◽  
Swept Source Oct ◽  
B Scan Images ◽  
Sd Oct

Abstract Posterior vitreous detachment (PVD) is a separation between the posterior vitreous cortex and internal limiting membrane. Although PVD was historically considered an acute event, recent studies using spectral-domain optical coherence tomography (SD-OCT) revealed a gradual progression of PVD in healthy subjects. Although SD-OCT improved PVD studies, the narrow imaging angle and long examination time were problematic to allow wide angle capture. The Xephilio OCT-S1 (Canon), a swept source OCT (SS-OCT) device, can obtain up to 23-mm of widefield B-scan images in a single acquisition. We used this widefield SS-OCT to quantitatively evaluate the PVD stage in 214 healthy subjects aged 4–89 years and determine whether PVD stages differ between the bilateral eyes of each patient. Age was significantly positively correlated with overall PVD stage (ρ=0.7520, P<0.001). Interestingly, partial PVD occurred in children as young as 5 years old, indicating that initial PVD onset may occur much earlier than previously reported.Furthermore, PVD stages of the bilateral eyes were highly consistent in 183 subjects (85.5%). Widefield 23-mm SS-OCT thus revealed that PVD started earlier than anticipated, and age is correlated with the symmetry of PVD stage. Widefield 23-mm SS-OCT may also be clinically useful for the evaluation of diseased eyes.

Swept-Source OCT System Based on a Polarization-Dependent Semiconductor Optical Amplifier-Enabled Fourier Domain Mode Locked Laser

2013 ◽  
Vol 710 ◽  
pp. 447-451
Author(s):  
Huai Ying Shang ◽  
Li Huo ◽  
Yuan Peng Wu ◽  
Cai Yun Lou
Keyword(s):  
Output Power ◽  
Semiconductor Optical Amplifier ◽  
Optical Amplifier ◽  
Spot Size ◽  
Fourier Domain ◽  
Swept Source ◽  
Saturation Power ◽  
Swept Source Oct ◽  
Oct Imaging ◽  
Mode Locked Laser

We demonstrate a swept-source OCT system based on a polorization-dependent semiconductor optical amplifier (SOA)-enabled Fourier Domain Mode Locked laser (FDML). The broad bandwidth and high saturation power of the semiconductor optical amplifier enables single semiconductor optical amplifier operation with enough bandwidth and output power. The FDML generates ~32mW output power at 45kHz sweep rates, with a tuning range of 115 nm centered at 1326 nm. Using the SOA-enabled FDML laser, ~12.9μm axial resolution,9μm transverse spot size and 105dB sensitivity are achieved. OCT imaging of biological sample is also demonstrated.

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