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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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Citations
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Journal ArticleDOI

Reproducibility of retinal thickness measurements in healthy subjects using spectralis optical coherence tomography.

TL;DR: Spectralis OCT retinal thickness measurements in healthy volunteers showed excellent intraobserver reproducibility with virtually identical results between retinal Thickness measurements performed by one operator.
Journal ArticleDOI

Optical Doppler Tomography: Imaging in vivo Blood Flow Dynamics Following Pharmacological Intervention and Photodynamic Therapy

TL;DR: Applications of this noninvasive optical technique for monitoring changes in blood flow dynamics and vessel structure following pharmacological intervention and photodynamic therapy are demonstrated.
Journal ArticleDOI

OCT for the identification of vulnerable plaque in acute coronary syndrome.

TL;DR: The utility of OCT in the evaluation of plaque composition can provide insights into the pathophysiology of acute coronary syndrome and the healing that occurs thereafter and its limitations are reviewed.
Journal Article

Spectral Domain Optical Coherence Tomography in Glaucoma: Qualitative and Quantitative Analysis of the Optic Nerve Head and Retinal Nerve Fiber Layer (An AOS Thesis)

TL;DR: This thesis presents the first comprehensive qualitative and quantitative evaluation of SDOCT images of the ONH and RNFL in glaucoma, and provides basis for developing more automated quantitative SDO CT algorithms needed for future prospective multicenter national trials.
Journal ArticleDOI

Tomographic phase microscopy: principles and applications in bioimaging [Invited].

TL;DR: Tomographic phase microscopy (TPM) is an emerging optical microscopic technique for bioimaging as mentioned in this paper, which uses digital holographic measurements of complex scattered fields to reconstruct three-dimensional refractive index (RI) maps of cells with diffraction-limited resolution by solving inverse scattering problems.
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.
Journal ArticleDOI

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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