Improved complex spectral domain OCT for in vivo eye imaging

2005 ◽  
Vol 249 (1-3) ◽  
pp. 357-362 ◽  
Author(s):  
Piotr Targowski ◽  
Iwona Gorczyńska ◽  
Maciej Szkulmowski ◽  
Maciej Wojtkowski ◽  
Andrzej Kowalczyk
Keyword(s):  
Spectral Domain ◽  
Spectral Domain Oct

In vivo tear film thickness measurement and tear film dynamics visualization using spectral domain OCT and an efficient delay estimator

2016 ◽  
Author(s):  
Valentin Aranha dos Santos ◽  
Leopold Schmetterer ◽  
Martin Gröschl ◽  
Gerhard Garhofer ◽  
René M. Werkmeister
Keyword(s):  
Film Thickness ◽  
Tear Film ◽  
Thickness Measurement ◽  
Spectral Domain ◽  
Spectral Domain Oct ◽  
Film Thickness Measurement

scholarly journals Spectral-Domain Optical Coherence Tomography for Macular Edema

2014 ◽  
Vol 2014 ◽  
pp. 1-6 ◽  
Author(s):  
Emmerson Badaró ◽  
Eduardo Novais ◽  
Larissa Maria Prodocimo ◽  
Juliana M. Ferraz Sallum
Keyword(s):  
Optical Coherence Tomography ◽  
Clinical Practice ◽  
Image Resolution ◽  
Spectral Domain ◽  
Retinal Diseases ◽  
Optical Coherence ◽  
Cross Sectional ◽  
Spectral Domain Oct ◽  
Acquisition Speed

Optical coherence tomography (OCT) is a rapid noncontact method that allows in vivo imaging of the retina and it has become an important component in clinical practice. OCT is a useful ancillary tool for assessing retinal diseases because of its ability to provide cross-sectional retinal images and quantitatively analyze retinal morphology. The introduction of spectral-domain OCT provided major improvements in image acquisition speed and image resolution. Future studies will address how these major technologic advances will impact the use of OCT in research and clinical practice.

scholarly journals In vivo volumetric imaging of the human corneo-scleral limbus with spectral domain OCT

2011 ◽  
Vol 2 (7) ◽  
pp. 1794 ◽  
Author(s):  
Kostadinka Bizheva ◽  
Natalie Hutchings ◽  
Luigina Sorbara ◽  
Alireza A. Moayed ◽  
Trefford Simpson
Keyword(s):  
Spectral Domain ◽  
Volumetric Imaging ◽  
Spectral Domain Oct

scholarly journals Application of Spectral Domain Optical Coherence Tomography to Objectively Evaluate Posterior Capsular Opacity In Vivo

2018 ◽  
Vol 2018 ◽  
pp. 1-9 ◽  
Author(s):  
Shasha Yu ◽  
Chengzhe Lu ◽  
Xin Tang ◽  
Xiaoyong Yuan ◽  
Bo Yuan ◽  
...  
Keyword(s):  
Visual Acuity ◽  
Objective Evaluation ◽  
Spectral Domain ◽  
Posterior Capsular Opacification ◽  
Slit Lamp ◽  
Cross Sectional ◽  
Spectral Domain Oct ◽  
Posterior Capsular Opacity ◽  
Sd Oct

Objectives. To objectively evaluate posterior capsular opacification (PCO) with RTVue-100 spectral domain-OCT and assess the agreement with the Pentacam system. Methods. Sixty-seven eyes diagnosed with PCO were included. RTVue-100 SD-OCT was used to scan the IOL outline and PCO at horizontal and vertical meridians. PCO was also imaged with a Pentacam and slit-lamp photography system. With RTVue-100 SD-OCT, the PCO area, thickness, density, and objective scores were recorded and used to evaluate the severity of PCO at 3 mm and 5 mm diameter ranges of the IOL optic region. We assessed the correlation of visual acuity, PCO characteristics, and PCO scores. PCO scores acquired from RTVue-100 SD-OCT images were also compared with those from the Pentacam. Differences between pear-type and fibrosis-type PCOs were also compared using RTVue-100 SD-OCT cross-sectional images. Results. The cross-sectional images of PCO acquired with RTVue-100 SD-OCT corresponded well to Pentacam and slit-lamp retroillumination images. IOL-posterior capsular space, area, thickness, and density of the proliferated and accumulated LECs could be clearly visualized and quantified with RTVue-100 SD-OCT. PCO scores were correlated with decreased visual acuity, which was in line with the outcomes using the Pentacam. Differences between the pear-type and fibrosis-type PCO were statistically significant; pear-type PCOs showed a wider and thicker opacification region with lower density compared with fibrosis-type PCOs. Conclusion. RTVue-100 SD-OCT could be a powerful tool in PCO objective evaluation and classification. OCT could be used to visualize the morphology and outline of PCO. Thus, it could discriminate and quantify differences between different types of PCO. PCO scores seem to be a useful factor that could reliably reflect PCO severity.

scholarly journals Design and Implementation Guidelines for a Modular Spectral-Domain Optical Coherence Tomography Scanner

2018 ◽  
Vol 2018 ◽  
pp. 1-22 ◽  
Author(s):  
Farid Atry ◽  
Israel Jacob De La Rosa ◽  
Kevin R. Rarick ◽  
Ramin Pashaie
Keyword(s):  
Optical Coherence Tomography ◽  
Imaging System ◽  
Optical Design ◽  
Spectral Domain ◽  
Design Parameters ◽  
Optical Coherence ◽  
Custom Made ◽  
Essential Knowledge ◽  
Sd Oct

In the past decades, spectral-domain optical coherence tomography (SD-OCT) has transformed into a widely popular imaging technology which is used in many research and clinical applications. Despite such fast growth in the field, the technology has not been readily accessible to many research laboratories either due to the cost or inflexibility of the commercially available systems or due to the lack of essential knowledge in the field of optics to develop custom-made scanners that suit specific applications. This paper aims to provide a detailed discussion on the design and development process of a typical SD-OCT scanner. The effects of multiple design parameters, for the main optical and optomechanical components, on the overall performance of the imaging system are analyzed and discussions are provided to serve as a guideline for the development of a custom SD-OCT system. While this article can be generalized for different applications, we will demonstrate the design of a SD-OCT system and representative results for in vivo brain imaging. We explain procedures to measure the axial and transversal resolutions and field of view of the system and to understand the discrepancies between the experimental and theoretical values. The specific aim of this piece is to facilitate the process of constructing custom-made SD-OCT scanners for research groups with minimum understanding of concepts in optical design and medical imaging.

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