Results 11 to 20 of about 100,316 (248)

A joint estimation detection of Glaucoma progression in 3D spectral domain optical coherence tomography optic nerve head images [PDF]

SPIE Proceedings, 2014
Glaucoma is an ocular disease characterized by distinctive changes in the optic nerve head (ONH) and visual field. Glaucoma can strike without symptoms and causes blindness if it remains without treatment. Therefore, early disease detection is important so that treatment can be initiated and blindness prevented.
Akram Belghith, Christopher Bowd, Robert N. Weinreb, Linda M. Zangwill   +3 more
openaire   +5 more sources

Swept-source optical coherence tomography and optical coherence tomography angiography in acquired toxoplasmic chorioretinitis: a case report

Journal of Medical Case Reports, 2018
Purpose To describe swept-source optical coherence tomography and optical coherence tomography angiography retinal changes in a case of acute toxoplasmic chorioretinitis both at the time of diagnosis and after healing.
Diego Vezzola, Davide Allegrini, Alfredo Borgia, Paolo Fogagnolo, Luca Mario Rossetti, Mario R. Romano, Stefano De Cillà   +6 more
doaj   +1 more source

Evaluation of a cheap ultrasonic stage for light source coherence function measurement, optical coherence tomography, optical coherence microscopy, and dynamic focusing

SPIE Proceedings, 2009
We evaluate the performance of a cheap ultrasonic stage in setups related to optical coherence tomography. The stage was used in several configurations: 1) optical delay line in optical coherence tomography (OCT) setup; 2) as a delay line measuring coherence function of a low coherence source (e.g. superluminescent diode); 3) as a path length modulator
Krstajić, Nikola, Matcher, Stephen J., Childs, David, Steenbergen, Wiendelt, Hogg, Richard, Smallwood, Rod   +5 more
openaire   +3 more sources

Comparison of Central Corneal Thickness Measurement by Specular Microscopy, Optical Coherence Tomography, Optical Biometry and Ultrasound Pachymetry in Normal Eyes

Journal of Evolution of Medical and Dental Sciences, 2023
BACKGROUND Precise central corneal thickness (CCT) measurement is of utmost importance in various corneal diseases and refractive procedures. Various methods are available to measure CCT. But studies comparing CCT measurements with different devices have shown variable results.
null Rubble Mangla, null Nitin Batra, null Gurvinder Kaur, null Tanisha Mittal, null Reenu Thomas   +4 more
openaire   +1 more source

Stepwise segmentation error correction in optical coherence tomography angiography images of patients with diabetic macular edema

Therapeutic Advances in Ophthalmology, 2020
Aim: To determine the minimum number of optical coherence tomography B-scan corrections required to provide acceptable vessel density measurements on optical coherence tomography angiography images in eyes with diabetic macular edema.
Khalil Ghasemi Falavarjani, Reza Mirshahi, Shahriar Ghasemizadeh, Mahsa Sardarinia   +3 more
doaj   +1 more source

Ventricular Fibrillation During Optical Coherence Tomography/Optical Frequency Domain Imaging　― A Large Single-Center Experience ―

Circulation Journal, 2020
The risks of ventricular fibrillation (Vfib) associated with frequency-domain optical coherence tomography (OCT)/optical frequency domain imaging (OFDI) remain undetermined.We retrospectively studied the occurrence of Vfib during OCT/OFDI for unselected indications. The frequency of Vfib and patient and procedural characteristics were investigated.
Terada, Noriko, Kuramochi, Tatsuhiko, Sugiyama, Tomoyo, Kanaji, Yoshihisa, Hoshino, Masahiro, Usui, Eisuke, Yamaguchi, Masao, Hada, Masahiro, Misawa, Toru, Sumino, Yohei, Hirano, Hidenori, Nogami, Kai, Ueno, Hiroki, Wakasa, Nobutaka, Hosokawa, Masahiro, Murai, Tadashi, Lee, Tetsumin, Yonetsu, Taishi, Kobashi, Kazuhiko, Kakuta, Tsunekazu   +19 more
openaire   +3 more sources

Detection of tumorigenesis in urinary bladder with optical coherence tomography: optical characterization of morphological changes

Optics Express, 2002
Most transitional cell tumorigenesis involves three stages of subcellular morphological changes: hyperplasia, dysplasia and neoplasia. Previous studies demonstrated that owing to its high spatial resolution and intermediate penetration depth, current OCT technology including endoscopic OCT could delineate the urothelium, submucosa and the upper ...
T, Xie, M, Zeidel, Yingtian, Pan
openaire   +2 more sources

Optical coherence tomography in pediatric patients: a clinical review

Therapeutic Advances in Ophthalmology, 2020
Optical coherence tomography has improved the ophthalmic clinical examination due to its ability to more accurately characterize pathology of the eye. Optical coherence tomography is now an integral imaging modality for many adult diseases of the retina ...
Bradley S. Gundlach, Irena Tsui
doaj   +1 more source

The Choroid and Optical Coherence Tomography

Türk Oftalmoloji Dergisi, 2016
The choroid is the most vascular tissue in the eye and it plays an important role in the pathophysiology of various common chorioretinal diseases such as central serous retinopathy, age-related macular degeneration and degenerative myopia.
Taha Sezer, Muhammet Altınışık, İbrahim Arif Koytak   +2 more
doaj   +1 more source

Optical Coherence Tomography

The Scientific World Journal, 2007
Optical coherence tomography (OCT) is an optical imaging modality that performs high-resolution, cross-sectional, subsurface tomographic imaging of the microstructure of tissues.
Pier Alberto Testoni
doaj   +1 more source