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    1. Mentioned In 193 Articles

    2. Multi-contrast Endomyocardial Imaging By Single-channel High Resolution Cross-polarization Optical Coherence Tomography

      Multi-contrast Endomyocardial Imaging By Single-channel High Resolution Cross-polarization Optical Coherence Tomography
      A single-channel high-resolution cross-polarization (CP) optical coherence tomography (OCT) system is presented for multi-contrast imaging of human myocardium in one-shot measurement. The intensity contrast and functional contrasts, including the ratio between the cross- and co- polarization channels as well as the cumulative retardation, are reconstructed from the CP-OCT readout. By comparing the CP-OCT results with histological analysis, it is shown that the system can successfully delineate micro-structures in the myocardium ...
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    3. Hybrid Deep Learning on Single Wide-field Optical Coherence Tomography Scans Accurately Classifies Glaucoma Suspects

      Hybrid Deep Learning on Single Wide-field Optical Coherence Tomography Scans Accurately Classifies Glaucoma Suspects
      Purpose: Existing summary statistics based upon optical coherence tomographic (OCT) scans and/or visual fields (VFs) are suboptimal for distinguishing between healthy and glaucomatous eyes in the clinic. This study evaluates the extent to which a hybrid deep learning method (HDLM), combined with a single wide-field OCT protocol, can distinguish eyes previously classified as either healthy suspects or mild glaucoma. Methods: In total, 102 eyes from 102 patients, with or ...
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    4. A Comparison of En Face Optical Coherence Tomography and Fundus Autofluorescence in Stargardt Disease

      A Comparison of En Face Optical Coherence Tomography and Fundus Autofluorescence in Stargardt Disease
      Purpose : To compare morphologic changes on en face images derived from wide-field swept-source optical coherence tomography (ssOCT) to hypo- and hyperautofluorescent (hypoAF, hyperAF) areas on short-wavelength autofluorescence (SW-AF), and near-infrared (NIR)-AF in recessive Stargardt disease (STGD1). Methods : Wide-field ssOCT cube scans were obtained from 16 patients (16 eyes). Averaged B-scans and SW-AF images were obtained using Spectralis HRA+OCT. NIR-AF images were obtained from 6 eyes. The inner/outer ...
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    5. Frequency-constrained robust principal component analysis: a sparse representation approach to segmentation of dynamic features in optical coherence tomography imaging

      Frequency-constrained robust principal component analysis: a sparse representation approach to segmentation of dynamic features in optical coherence tomography imaging
      Sparse representation theory is an exciting area of research with recent applications in medical imaging and detection, segmentation, and quantitative analysis of biological processes. We present a variant on the robust-principal component analysis (RPCA) algorithm, called frequency constrained RPCA (FC-RPCA), for selectively segmenting dynamic phenomena that exhibit spectra within a user-defined range of frequencies. The algorithm lacks subjective parameter tuning and demonstrates robust segmentation in datasets containing multiple motion sources ...
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    6. Serial 3-Vessel Optical Coherence Tomography and Intravascular Ultrasound Analysis of Changing Morphologies Associated With Lesion Progression in Patients With Stable Angina Pectoris

      Serial 3-Vessel Optical Coherence Tomography and Intravascular Ultrasound Analysis of Changing Morphologies Associated With Lesion Progression in Patients With Stable Angina Pectoris
      Background Optical coherence tomographic (OCT) morphologies associated with lesion progression are not well studied. The aim of this study was to determine the morphological change for untreated lesion progression using both OCT and intravascular ultrasound (IVUS). Methods and Results We used baseline and 8-month follow-up 3-vessel OCT and IVUS to assess 127 nonculprit lesions (IVUS plaque burden 40%) in 45 patients with stable angina after target lesion treatment. Lesion progression ...
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    7. OCT-Angiography and Ultra-Widefield Fluorescein Angiography for Early Detection of Adolescent Sickle Retinopathy

      OCT-Angiography and Ultra-Widefield Fluorescein Angiography for Early Detection of Adolescent Sickle Retinopathy
      Purpose Using standard screening techniques, sickle retinopathy reportedly occurs in 10% of adolescents with sickle cell disease (SCD). We performed a prospective, observational clinical study to determine if ultra-widefield fluorescein angiography (UWFA), spectral-domain optical coherence tomography (SD-OCT) and optical coherence tomography angiography (OCT-A) detect more frequent retinopathy in adolescents with SCD. Design Cross-sectional study. Methods Setting : Institutional. Subjects : Sixteen adolescents with SCD, ages 10-19 years, (mean age 14.9 years ...
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    8. Prevalence, Predictors, and Clinical Presentation of a Calcified Nodule as Assessed by Optical Coherence Tomography

      Prevalence, Predictors, and Clinical Presentation of a Calcified Nodule as Assessed by Optical Coherence Tomography
      Objectives This study sought to determine the anatomic characteristics and clinical presentation associated with a calcified nodule (CN) as assessed by optical coherence tomography. Background CN is an unusual but demonstrable cause of acute coronary syndromes (ACS). Methods We studied 889 de novo culprit lesions in 889 patients (48% ACS) who underwent optical coherence tomography before intervention. CN was defined as an eruptive accumulation of nodular calcification (small fractured calcifications ...
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    9. In Vivo Calcium Detection by Comparing Optical Coherence Tomography, Intravascular Ultrasound, and Angiography

      In Vivo Calcium Detection by Comparing Optical Coherence Tomography, Intravascular Ultrasound, and Angiography
      Objectives The aim of this study was to evaluate optical coherence tomography (OCT) and intravascular ultrasound (IVUS) versus coronary angiography in the assessment of target lesion calcification and its effect on stent expansion. Background IVUS is more sensitive than angiography in the detection of coronary artery calcium, but the relationship among IVUS, OCT, and angiography has not been studied. Methods Overall, 440 lesions (440 patients with stable angina) underwent OCT- ...
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    10. Highly phase-stable 200 kHz swept-source optical coherence tomography based on KTN electro-optic deflector

      Highly phase-stable 200 kHz swept-source optical coherence tomography based on KTN electro-optic deflector
      The rapid advance in swept-source optical coherence tomography (SS-OCT) technology has enabled exciting new applications in elastography, angiography, and vibrometry, where both high temporal resolution and phase stability are highly sought-after. In this paper, we present a 200 kHz SS-OCT system centered at 1321 nm by using an electro-optically tuned swept source. The proposed systems performance was fully characterized, and it possesses superior phase stability (0.0012% scanning variability and ...
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    11. EuroIntervention Characteristics of early versus late in-stent restenosis in second-generation drug-eluting stents: an optical coherence tomography study

      EuroIntervention Characteristics of early versus late in-stent restenosis in second-generation drug-eluting stents: an optical coherence tomography study
      Aims: In-stent restenosis (ISR) is an important cause of drug-eluting stent (DES) failure and target vessel revascularisation. In this study we aimed to evaluate differences between early and late-presenting restenosis in second-generation DES using optical coherence tomography (OCT). Methods and results: Overall, 171 cases of second-generation DES ISR with a follow-up OCT minimum lumen area 3.0 mm 2 were included: 33.3% of patients (n=57) had early ISR ...
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    12. The Retinal Atlas, 2nd Edition

      The Retinal Atlas, 2nd Edition
      Withmore than 5,000 images, a unique page layout, and comprehensive illustrationsof the entire spectrum of vitreous, retina, and macula disorders,The Retinal Atlas, 2nd Edition, is an indispensable reference for retina specialists and comprehensive ophthalmologists as well as residents and fellows in training. For this edition, an expanded author team made up of Drs. K. Bailey Freund, David Sarraf, William F. Mieler, and Lawrence A. Yannuzzi, each an expert ...
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    13. Columbia University Receives NIH Grant for Structural and Functional Progression of Glaucomatous Damage or the Macula

      Columbia University Receives NIH Grant for Structural and Functional Progression of Glaucomatous Damage or the Macula
      ...ful in clinicl practice, and 3) to mitigate the burdens of progressive loss of central vision in glaucoma.

      Columbia University Receives a 2017 NIH Grant for $400,000 for Structural and Functional Progression of Glauco...

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    14. 1-15 of 193 1 2 3 4 ... 11 12 13 »
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  2. About Columbia University

    Columbia University

    Columbia University.  From its beginnings in a schoolhouse in lower Manhattan, Columbia University has grown to encompass two principal campuses: the historic, neoclassical campus in the Morningside Heights neighborhood and the modern Medical Center further uptown, in Washington Heights. Today, Columbia is one of the top academic and research institutions in the world, conducting pathbreaking research in medicine, science, the arts, and the humanities. It includes three undergraduate schools, thirteen graduate and professional schools, and a school of continuing education.