1. Articles from j. lee

    1-4 of 4
    1. Volumetric monitoring of aqueous two phase system droplets using time-lapse optical coherence tomography

      Volumetric monitoring of aqueous two phase system droplets using time-lapse optical coherence tomography

      We present a volumetric monitoring method to observe the morphological changes of aqueous two phase system (ATPS) droplets in a microfluidic system. Our method is based on time-lapse optical coherence tomography (OCT) which allows the study of the dynamics of ATPS droplets while visualizing their 3D structures and providing quantitative information on the droplets. In this study, we monitored the process of rehydration and deformation of an ATPS droplet in a microfluidic system and quantified the changes of its volume and velocity under both static and dynamic fluid conditions. Our results indicate that time-lapse OCT is a very promising tool ...

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    2. The choroid profiles at the posterior pole measured by enhanced depth imaging optical coherence tomography in healthy Korean children

      The choroid profiles at the posterior pole measured by enhanced depth imaging optical coherence tomography in healthy Korean children

      Purpose To assess the changes of the choroidal thickness in healthy Korean Children using enhanced depth imaging (EDI) optical coherence tomography (OCT) and to evaluate the association of choroidal thickness and axial length. Methods Seventy-nine eyes (79 children) with cycloplegic refractive errors within ± 1diopter spherical equivalent underwent horizontal scan using EDI OCT. The choroidal thickness was the vertical distance between the posterior edge of the retinal pigment epithelium and the inner scleral border at 1mm intervals from 3mm nasal and 4mm temporal to the fovea using the manual caliper provided by the software of the device. Axial length was examined ...

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    3. Negative refraction power causes underestimation of peripapillary retinal nerve fibre layer thickness in spectral-domain optical coherence tomography tomography

      Negative refraction power causes underestimation of peripapillary retinal nerve fibre layer thickness in spectral-domain optical coherence tomography tomography
      Background/aims Although studies using optical coherence tomography (OCT) reported that the retinal nerve fibre layer (RNFL) thickness of myopic eyes was thinner than those of normal controls, it was unclear if this finding indicated the difference in actual structural thickness or that created by sources affecting accuracy of OCT measurement. This study's aim was to evaluate the effect of refraction power on the measurement of the RNFL thickness using spectral-domain OCT. Methods OCT scans to measure RNFL thickness were repeated in 15 cycloplegic eyes of 15 participants, while different refraction powers were induced by wearing soft contact lenses ...
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    4. Wavelength-Tunable Broadband Frequency-Domain OCT Source Based on Spatially Filtered Sub-10-fs Pulsed Laser

      A wavelength swept broadband source based on a sub-10-femtosecond (fs) pulse laser and a spatial filtering method was developed for the application to frequency-domain optical coherence tomography (FD-OCT). The use of the sub-10-fs laser with a galvano scanner operating at a high repetition rate provided a fast tunable broadband light source, which tuned the spectral component across the spectral bandwidth of 110 nm at 1-kHz repetition rate. The spectrally filtered light beam had 0.5-nm instantaneous spectral linewidths at 1-mW average output power. The implemented FD-OCT system clearly imaged a narrow air gap between glass plates with an axial resolution ...
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    1-4 of 4
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  2. Topics in the News

    1. (1 articles) Yonsei University
    2. (1 articles) Gong Je Seong
    3. (1 articles) Chan Yun Kim
    4. (1 articles) Eun Suk Lee
    5. (1 articles) Na Rae Kim
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    Negative refraction power causes underestimation of peripapillary retinal nerve fibre layer thickness in spectral-domain optical coherence tomography tomography The choroid profiles at the posterior pole measured by enhanced depth imaging optical coherence tomography in healthy Korean children Volumetric monitoring of aqueous two phase system droplets using time-lapse optical coherence tomography Widefield Swept Source OCTA in Retinitis Pigmentosa Anterior segment optical coherence tomographic characterisation of keratic precipitate Vascular changes with optical coherence tomography angiography during aura of migraine: A case report Numerical method for axial motion artifact correction in retinal spectral-domain optical coherence tomography OPTICAL COHERENCE TOMOGRAPHY ANGIOGRAPHY IN PATIENTS WITH RETINITIS PIGMENTOSA–ASSOCIATED CYSTOID MACULAR EDEMA Noise reduction in optical coherence tomography images using a deep neural network with perceptually-sensitive loss function Optical coherence tomography angiography in diabetes: A review Quantification of Retinal Nerve Fibre Layer Thickness on Optical Coherence Tomography with a Deep Learning Segmentation-Free Approach Optical coherence tomography of the retina in schizophrenia: Inter-device agreement and relations with perceptual function