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Open AccessJournal ArticleDOI

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

Complementary use of cross-polarization and standard OCT for differential diagnosis of pathological tissues

TL;DR: It is shown that healthy, neoplastic and scar tissues of the esophagus have different cross-polarization backscattering properties, which improves the specificity of diagnostics of pathological changes occurring in tissues.
Journal ArticleDOI

Quantitative 3D-OCT motion correction with tilt and illumination correction, robust similarity measure and regularization

TL;DR: The quantitative results consistently show that reproducibility is improved considerably by using the advanced algorithm, which also significantly outperforms the basic algorithm, and demonstrates that the advanced motion correction algorithm has the potential to improve the reliability of quantitative measurements derived from 3D-OCT data substantially.
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Simultaneous B-M-mode scanning method for real-time full-range Fourier domain optical coherence tomography

TL;DR: High-speed complex full-range Fourier domain optical coherence tomography (FD-OCT) is demonstrated, which investigates a sweat duct in a finger pad in vivo and visualizes it with an acquisition time of 27 ms.
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Optical coherence tomography as a method for identifying benign and malignant microscopic structures in the prostate gland

TL;DR: Microscopic resolution is possible in human prostatic tissue using OCT and further studies using this technique to improve the detection and staging of adenocarcinoma of the prostate are ongoing.
Journal ArticleDOI

Low-coherence optical tomography in turbid tissue: theoretical analysis

TL;DR: Theoretical analyses and preliminary experimental results suggest that, unlike time-resolving spectroscopy, low-coherence optical tomography detects the local relative variations of path-length-resolved reflectance from the turbid tissues.
References
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Journal ArticleDOI

Computerized transverse axial scanning (tomography): Part I. Description of system. 1973.

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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