Light is emitted through either a spectral domain OCT (SD-OCT), with a wavelength of near 800nm; or a swept-source OCT (SS-OCT), which utilizes a longer wavelength, close to 1050nm.

2019年6月8日 · The important difference between OCT and OCTA is: OCT images anatomical structure, OCTA images vascular structure. A large amount of burden is placed on the imager-usually technicians-because the amount of data captured in a scan is more than the clinician, or interpreter of the images, can feasibly decipher.

Though original clinical OCT units were based on time domain detection, spectral domain OCT (SD-OCT) is now the clinical standard. This technology utilizes a light beam that is split into an exploring arm and a reference arm to generate an image.

2015年4月15日 · Optical coherence tomography angiography (OCTA) is a new, non-invasive imaging technique that generates volumetric angiography images in a matter of seconds. This is a nascent technology with a potential wide applicability for retinal vascular disease. At present, level 1 evidence of the technology’s clinical applications doesn’t exist.

2024年9月26日 · Optical coherence tomography (OCT) and optical coherence tomography angiography (OCTA) are non-invasive imaging tests. They use light waves to take cross-section pictures of your retina. With OCT, your ophthalmologist can see each of the retina’s distinctive layers and the optic nerve fiber layer.

Q 什么是眼科OCT和OCTA检查？ A OCT是眼底疾病重要的影像诊断手段之一，它虽被喻为“眼科CT”、眼底“光学活检”，但它无辐射、无创伤，使得视网膜每一层结构如同“千层蛋糕”一样清晰可辨…

2018年11月9日 · The aim of our study was to quantitatively compare the clinical performance of five different OCTA systems: AngioVue, AngioPlex, Spectralis OCTA, AngioScan, and SS OCT Angio.

2024年10月6日 · Distinguishing the differences between Doppler OCT and OCTA is critical. Although they both use phase information, Doppler OCT quantifies blood flow in larger vessels and measures total retinal blood flow using phase shift. In contrast, OCTA analyzes scatter from a static background tissue to create angiograms. [7] [8]

2019年8月14日 · Compared to previous state of the art dye-based imaging, such as fluorescein angiography, OCTA is non-invasive, time-efficient, and it allows for the examination of retinal vasculature in 3D. These advantages of the technique combined with the good usability in commercial devices led to a quick adoption of the new modality in the clinical routine.

2025年4月2日 · To this end, we propose the multi-view Tri-alignment framework for OCT to OCTA 3D image translation in discrete and finite space, named MuTri. In the first stage, we pre-train two vector-quantized variational auto-encoder (VQ- VAE) by reconstructing 3D OCT and 3D OCTA data, providing semantic prior for subsequent multi-view guidances.