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Optical coherence tomography

TLDR
OCT as discussed by the authors uses low-coherence interferometry to produce a two-dimensional image of optical scattering from internal tissue microstructures in a way analogous to ultrasonic pulse-echo imaging.
Abstract
A technique called optical coherence tomography (OCT) has been developed for noninvasive cross-sectional imaging in biological systems. OCT uses low-coherence interferometry to produce a two-dimensional image of optical scattering from internal tissue microstructures in a way that is analogous to ultrasonic pulse-echo imaging. OCT has longitudinal and lateral spatial resolutions of a few micrometers and can detect reflected signals as small as approximately 10(-10) of the incident optical power. Tomographic imaging is demonstrated in vitro in the peripapillary area of the retina and in the coronary artery, two clinically relevant examples that are representative of transparent and turbid media, respectively.

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Journal ArticleDOI

Ocular surface epithelial thickness evaluation with spectral-domain optical coherence tomography.

TL;DR: Anterior segment SD-OCT can provide a noninvasive evaluation of ocular surface epithelial thickness and was modified in dry eye patients and patients using IOP-lowering eye drops, whereas aging seemed to have no effect.
Journal ArticleDOI

3D morphometry of red blood cells by digital holography.

TL;DR: This work proves the new procedure for healthy red blood cells (RBCs) (i.e., discocytes) having a concave surface in their central region and shows that the method can be also useful to classify, in terms of morphology, different varieties of RBCs.
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High-sensitivity determination of birefringence in turbid media with enhanced polarization-sensitive optical coherence tomography

TL;DR: In this article, a method for high-sensitivity birefringence quantification by using enhanced polarization-sensitive optical coherence tomography (EPS-OCT) is presented.
Journal ArticleDOI

Three-dimensional endomicroscopy of the human colon using optical coherence tomography.

TL;DR: The potential of 3D-OCT for distinguishing normal from pathologic colorectal tissue, assessing endoscopic therapies and healing progression is demonstrated in vivo using a swept source optical coherence tomography (OCT) system.
Journal ArticleDOI

Diagnostic capability of optical coherence tomography (Stratus OCT 3) in early glaucoma

TL;DR: Optical coherence tomography has moderate sensitivity with high specificity for the diagnosis of early glaucoma and may have a potential role in screening.
References
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Journal ArticleDOI

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TL;DR: A technique in which X-ray transmission readings are taken through the head at a multitude of angles: from these data, absorption values of the material contained within the head are calculated on a computer and presented as a series of pictures of slices of the cranium.
Journal ArticleDOI

Clinically detectable nerve fiber atrophy precedes the onset of glaucomatous field loss.

TL;DR: Nerve fiber layer defects expanded with time, often by the development and coalescence of adjacent areas of damage, and field defects closely corresponded, but nerve fiber layer loss was generally more widespread.
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Retinal ganglion cell atrophy correlated with automated perimetry in human eyes with glaucoma.

TL;DR: Estimates suggest that visual field sensitivity in automated testing begins to decline soon after the initial loss of ganglion cells in human eyes with glaucoma, and that this decline is most pronounced in areas that had 0-dB sensitivity in the field test.
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