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The idea of using frequency modulation and coherent detection to obtain ranging information was already demonstrated in optical frequency domain reflectometry [9] and laser radar [14] in the 1980s, though the distance resolution and range were much longer than OCT. There are two types of FD-OCT – swept-source OCT (SS-OCT) and spectral-domain ...
Optical coherence tomography is an imaging modality that uses low-coherence interferometry to obtain high resolution, depth-resolved volumetric images. OCT can be used to capture functional images of blood flow, a technique known as optical coherence tomography angiography (OCT-A). SV-OCT is one method for OCT-A that uses the variance of ...
[18] [19] This has allowed OCTA to obtain detailed images of retinal vasculature in the human retina [20] and become widely used clinically to diagnose a variety of eye diseases, such as age related macular degeneration (AMD), [21] diabetic retinopathy (DR), [22] [23] artery and vein occlusions, and glaucoma. [24] [18]
State-of-the-art intracoronary optical coherence tomography uses a swept-source laser to make OCT images at high-speed (i.e., approximately 80,000 kHz - A-scan lines per second) to complete acquisition of a 3D OCT volume of coronary segments in a few-seconds. [33]
OCT Biomicroscopy is the use of optical coherence tomography (OCT) in place of slit lamp biomicroscopy to examine the transparent axial tissues of the eye. [1] Traditionally, ophthalmic biomicroscopy has been completed with a slit lamp biomicroscope that uses slit beam illumination and an optical microscope to enable stereoscopic, magnified, cross-sectional views of transparent tissues in the ...
For example, the group found a 195% increase with DA-OCT versus On-Axis OCT, and a 169% increase with DA-DOF+ versus On-Axis OCT DOF+. The DA-OCT and DA-DOF+ did not show strong CNR at shallower depths compared to On-Axis OCT and On-Axis OCT DOF+ because the needle surface was located too far from the system's focal zone.
Scanning laser ophthalmoscopy developed as a method to view a distinct layer of the living eye at the microscopic level. The use of confocal methods to diminish extra light by focusing detected light through a small pinhole made possible the imaging of individual layers of the retina with greater distinction than ever before. [4]
In October 2018, Carl Zeiss Meditec won FDA premarket approval for its ReLEx Smile laser system. [4] Also in October 2018, Carl Zeiss Meditec announced the acquisition of Reno, Nevada-based IanTech for an undisclosed sum. [5] [6] In September 2019, Carl Zeiss Meditec launched the CIRRUS 6000 at the European Society of Retina Specialists 2019 ...