Digital adaptive optics based on digital lateral shearing of the computed pupil field for flying spot retinal swept source OCT in vivo

2021 ◽  
Author(s):  
Abhishek Kumar ◽  
Stefan Georgiev ◽  
Matthias Salas ◽  
Rainer A. Leitgeb
Keyword(s):  
Adaptive Optics ◽  
Swept Source ◽  
Lateral Shearing ◽  
Swept Source Oct ◽  
Flying Spot

scholarly journals Digital adaptive optics based on digital lateral shearing of the computed pupil field for point scanning retinal swept source OCT

2021 ◽  
Vol 12 (3) ◽  
pp. 1577
Author(s):  
Abhishek Kumar ◽  
Stefan Georgiev ◽  
Matthias Salas ◽  
Rainer A. Leitgeb
Keyword(s):  
Adaptive Optics ◽  
Swept Source ◽  
Lateral Shearing ◽  
Swept Source Oct

scholarly journals In-vivo digital wavefront sensing using swept source OCT

2017 ◽  
Vol 8 (7) ◽  
pp. 3369 ◽  
Author(s):  
Abhishek Kumar ◽  
Lara M. Wurster ◽  
Matthias Salas ◽  
Laurin Ginner ◽  
Wolfgang Drexler ◽  
...  
Keyword(s):  
Wavefront Sensing ◽  
Swept Source ◽  
Swept Source Oct

In-vivo imaging of keratoconic corneas using high-speed high-resolution swept-source OCT

2013 ◽  
Author(s):  
S. Marschall ◽  
A. Gawish ◽  
Y. Feng ◽  
L. Sorbara ◽  
P. Fieguth ◽  
...  
Keyword(s):  
High Resolution ◽  
In Vivo Imaging ◽  
High Speed ◽  
Swept Source ◽  
Swept Source Oct

scholarly journals Lens-based wavefront sensorless adaptive optics swept source OCT

2016 ◽  
Vol 6 (1) ◽  
Author(s):  
Yifan Jian ◽  
Sujin Lee ◽  
Myeong Jin Ju ◽  
Morgan Heisler ◽  
Weiguang Ding ◽  
...  
Keyword(s):  
Adaptive Optics ◽  
Swept Source ◽  
Swept Source Oct

scholarly journals Optimized imaging of the suprachoroidal space with swept-source OCT

2019 ◽  
Vol 16 (4) ◽  
pp. 323-328
Author(s):  
Joel Hanhart ◽  
Rozenman Yaacov
Keyword(s):  
Optical Coherence Tomography ◽  
Enhanced Depth Imaging ◽  
Swept Source ◽  
Depth Imaging ◽  
New Approach ◽  
Suprachoroidal Space ◽  
Outer Border ◽  
Minimum Age ◽  
Swept Source Oct

Purpose: To compare enhanced depth imaging (EDI) and non-EDI swept source optical coherence tomography (SS-OCT) in their ability to capture the suprachoroidal space (SCS). Materials and methods: Twenty volunteers with a minimum age of 18 years without any ocular pathology and refractive error below Å} 2 diopters underwent SS-OCT foveal scanning, with and without EDI. Masked averaged B-scan lines were analyzed for presence of the SCS. When the SCS was seen, the percentage of the scan on which this structure could be unequivocally observed was measured. Scores obtained from the images taken with or without EDI were then compared. Results: Thirty-seven eyes were analysed, since three eyes of three different patients were eliminated, as the outer border of the choroid was insufficiently delineated with both modalities. The SCS was not detected at all on 14 pictures (37.8%) obtained by non-EDI SS-OCT and 9 pictures (24.3%) obtained by EDI SS-OCT. When the SCS was detected with both modalities, it was observable on 27.2+/-24.2% of the scan without EDI and 40.4+/-30.3 of the scan with EDI (p < .001) Conclusions: EDI SS-OCT enables a more frequent and extensive visualization of the suprachoroidal space than non-EDI SS-OCT. This new approach could be considered as the most accurate modality to currently visualize the SCS in vivo.

scholarly journals Doppler optical cardiogram gated 2D color flow imaging at 1000 fps and 4D in vivo visualization of embryonic heart at 45 fps on a swept source OCT system

2007 ◽  
Vol 15 (4) ◽  
pp. 1627 ◽  
Author(s):  
Adrian Mariampillai ◽  
Beau A. Standish ◽  
Nigel R. Munce ◽  
Cristina Randall ◽  
George Liu ◽  
...  
Keyword(s):  
Embryonic Heart ◽  
Flow Imaging ◽  
Color Flow ◽  
Swept Source ◽  
Color Flow Imaging ◽  
Swept Source Oct

scholarly journals Functional retinal imaging using adaptive optics swept-source OCT at 16  MHz

Optica ◽  
2019 ◽  
Vol 6 (3) ◽  
pp. 300 ◽  
Author(s):  
Mehdi Azimipour ◽  
Justin V. Migacz ◽  
Robert J. Zawadzki ◽  
John S. Werner ◽  
Ravi S. Jonnal
Keyword(s):  
Adaptive Optics ◽  
Retinal Imaging ◽  
Swept Source ◽  
Swept Source Oct

scholarly journals Optical Coherence Tomography in the Diagnosis and Monitoring of Retinal Diseases

2013 ◽  
Vol 2013 ◽  
pp. 1-13 ◽  
Author(s):  
Simona-Delia Ţălu
Keyword(s):  
Optical Coherence Tomography ◽  
Adaptive Optics ◽  
Motion Artifacts ◽  
Enhanced Depth Imaging ◽  
Retinal Diseases ◽  
Optical Coherence ◽  
Cross Sectional ◽  
Swept Source ◽  
Sd Oct

Optical coherence tomography (OCT) allows the visualization of the retinal microarchitecture as cross-sectional or tomographic volumetric data. The usefulness of OCT in the management of various retinal diseases is validated by the possibility to allow early diagnosis and to help in the decision-making process. OCT is applied by two main methods: time domain (TD-OCT) and spectral domain (SD-OCT). The advantages of SD-OCT over TD-OCT are significant improvement of the image axial resolution, decreased acquisition times, reduction of motion artifacts, increased area of retinal sampling, and the possibility to create topographic maps by the three-dimensional evaluation of tissues. OCT is the most precise method to measure the central macular thickness (which is the most important practical parameter) in vivo. It has been demonstrated that there are differences in the retinal thickness measurements between OCT models, explained by the higher axial and transverse resolutions of the newer devices. Further research has led to significant improvements in OCT technology represented by ultrahigh resolution OCT (UHR-OCT), swept source OCT (SS-OCT), enhanced depth imaging OCT (EDI-OCT), and adaptive optics. Technological progress in OCT imaging offered new perspectives for better understanding the retinal diseases, opening new avenues for the fundamental and clinical research. This is a review of the data in the literature concerning the evolution of OCT technology in the field of retinal imaging.

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