Results 291 to 300 of about 620,208 (350)

Quantitative expression of Oct-3/4 defines differentiation, dedifferentiation or self-renewal of ES cells

Nature Genetics, 2000
Hitoshi Niwa, Jun-ichi Miyazaki
exaly   +2 more sources

Retinal applications of swept source optical coherence tomography (OCT) and optical coherence tomography angiography (OCTA).

Progress in retinal and eye research, 2021
The advent of optical coherence tomography (OCT) revolutionized both clinical assessment and research of vitreoretinal conditions. Since then, extraordinary advances have been made in this imaging technology, including the relatively recent development ...
I. Laíns, Jay C. Wang, Ying Cui, Raviv Katz, Filippos Vingopoulos, G. Staurenghi, D. Vavvas, Joan W. Miller, John B. Miller   +8 more
semanticscholar   +1 more source

An Efficient Lens Structures Segmentation Method on AS-OCT Images

2020 42nd Annual International Conference of the IEEE Engineering in Medicine & Biology Society (EMBC), 2020
Lens structures segmentation on anterior segment optical coherence tomography (AS-OCT) images is a fundamental task for cataract grading analysis. In this paper, in order to reduce the computational cost while keeping the segmentation accuracy, we propose an efficient segmentation method for lens structures segmentation. At first, we adopt an efficient
Guiping, Cao, Wei, Zhao, Risa, Higashita, Jiang, Liu, Wan, Chen, Jin, Yuan, Yubing, Zhang, Ming, Yang   +7 more
openaire   +2 more sources

Polymeric nanoparticles as OCT contrast agents

Journal of Nanoparticle Research, 2012
In this study, the optical properties of two nano-sized polymer colloids in optical coherence tomography (OCT) were compared in vitro with respect to their potential use as contrast agents. We used two types of particles: compact hydrophobic spherical polystyrene (PS) particles and soft water-swollen nanogel (NG) particles both with grafted ...
Wa’el Al Rawashdeh, Stefan Kray, Andrij Pich, Sascha Pargen, Andreea Balaceanu, Markus Lenz, Felix Spöler, Fabian Kiessling, Wiltrud Lederle   +8 more
openaire   +1 more source

Anterior Segment Optical Coherence Tomography (AS-OCT) Visualization of Anterior Vitritis

Ocular Immunology and Inflammation, 2022
The clinical grading of vitreous haze presents some limitations such as subjectivity and intra-grader variability. On the other hand the proposed OCT-based methods only explore the posterior part of the vitreous. Here we describe the inflammatory changes affecting the anterior vitreous imaged by Anterior Segment Optical Coherence, Tomography (AS-OCT ...
Federico Zicarelli, Giovanni Staurenghi, Alessandro Invernizzi   +2 more
openaire   +2 more sources

Hybrid Variation-Aware Network for Angle-Closure Assessment in AS-OCT

IEEE Transactions on Medical Imaging, 2022
Automatic angle-closure assessment in Anterior Segment OCT (AS-OCT) images is an important task for the screening and diagnosis of glaucoma, and the most recent computer-aided models focus on a binary classification of anterior chamber angles (ACA) in AS-OCT, i.e., open-angle and angle-closure.
Jinkui Hao, Fei Li, Huaying Hao, Huazhu Fu, Yanwu Xu, Risa Higashita, Xiulan Zhang, Jiang Liu, Yitian Zhao   +8 more
openaire   +2 more sources

Lens structure segmentation from AS-OCT images via shape-based learning

Computer Methods and Programs in Biomedicine, 2023
The lens is one of the important refractive media in the eyeball. Abnormality of the nucleus or cortex in the lens can lead to ocular disorders such as cataracts and presbyopia. To achieve an accurate diagnosis, segmentation of these ocular structures from anterior segment optical coherence tomography (AS-OCT) is essential.
Huihui Fang, Pengshuai Yin, Huanxin Chen, Yupeng Fang, Wan Chen, Jin Yuan, Higashita Risa, Jiang Liu, Yanwu Xu   +8 more
openaire   +2 more sources

RETOUCH: The Retinal OCT Fluid Detection and Segmentation Benchmark and Challenge

IEEE Transactions on Medical Imaging, 2019
Retinal swelling due to the accumulation of fluid is associated with the most vision-threatening retinal diseases. Optical coherence tomography (OCT) is the current standard of care in assessing the presence and quantity of retinal fluid and image-guided
Hrvoje Bogunović, F. Venhuizen, S. Klimscha, Stefanos Apostolopoulos, A. Bab-Hadiashar, Ulas Bagci, M. Beg, Loza Bekalo, Qiang Chen, Carlos Ciller, Karthik Gopinath, A. Gostar, Kiwan Jeon, Zexuan Ji, S. Kang, D. Koozekanani, Donghuan Lu, Dustin Morley, Keshab K. Parhi, Hyoung Suk Park, A. Rashno, M. Sarunic, S. Shaikh, J. Sivaswamy, Ruwan Tennakoon, Shivin Yadav, Sandro De Zanet, S. Waldstein, Bianca S. Gerendas, C. Klaver, C. I. Sánchez, U. Schmidt-Erfurth   +31 more
semanticscholar   +1 more source

OCT angiography and evaluation of the choroid and choroidal vascular disorders.

Progress in retinal and eye research, 2018
The recent introduction of optical coherence tomography angiography (OCTA) has remarkably expanded our knowledge of the choroid through in vivo investigation of the anatomical and pathological features of this important vascular layer.
E. Borrelli, D. Sarraf, K. B. Freund, R. Srinivas, Sadda   +4 more
semanticscholar   +1 more source