1. Columbia University

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    1. Mentioned In 302 Articles

    2. Using Optical Coherence Tomography and Intravascular Ultrasound Imaging to Quantify Coronary Plaque Cap Stress/Strain and Progression: A Follow-Up Study Using 3D Thin-Layer Models

      Using Optical Coherence Tomography and Intravascular Ultrasound Imaging to Quantify Coronary Plaque Cap Stress/Strain and Progression: A Follow-Up Study Using 3D Thin-Layer Models
      Accurate plaque cap thickness quantification and cap stress/strain calculations are of fundamental importance for vulnerable plaque research. To overcome uncertainties due to intravascular ultrasound (IVUS) resolution limitation, IVUS and optical coherence tomography (OCT) coronary plaque image data were combined together to obtain accurate and reliable cap thickness data, stress/strain calculations, and reliable plaque progression predictions. IVUS, OCT, and angiography baseline and follow-up data were collected from nine patients ...
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    3. Ultrawide field, distortion-corrected ocular shape estimation with MHz optical coherence tomography (OCT)

      Ultrawide field, distortion-corrected ocular shape estimation with MHz optical coherence tomography (OCT)
      Ocular deformation may be associated with biomechanical alterations in the structures of the eye, especially the cornea and sclera in conditions such as keratoconus, congenital glaucoma, and pathological myopia. Here, we propose a method to estimate ocular shape using an ultra-wide field MHz swept-source optical coherence tomography (SS-OCT) with a Fourier Domain Mode-Locked (FDML) laser and distortion correction of the images. The ocular biometrics for distortion correction was collected by ...
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    4. Clinical determinants of coronary artery disease burden and vulnerability using optical coherence tomography co-registered with intravascular ultrasound

      Clinical determinants of coronary artery disease burden and vulnerability using optical coherence tomography co-registered with intravascular ultrasound
      Objectives: We investigated clinical determinants of disease burden and vulnerability using optical coherence tomography (OCT) co-registered with intravascular ultrasound (IVUS) in a large cohort of patients. Methods: A total of 704 patients [44.5% with acute coronary syndromes (ACS)] underwent coronary intervention. IVUS plaque burden and OCT lipid, macrophage and calcium indices and the presence of thrombus, plaque rupture and thin-cap fibroatheroma (TCFA) were analyzed. Results: Median patient age was ...
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    5. Comparison of 6‐month vascular healing response after bioresorbable polymer versus durable polymer drug‐eluting stent implantation in patients with acute coronary syndromes: A randomized serial optical coherence tomography study

      Comparison of 6‐month vascular healing response after bioresorbable polymer versus durable polymer drug‐eluting stent implantation in patients with acute coronary syndromes: A randomized serial optical coherence tomography study
      Objectives This study was conducted to use optical coherence tomography (OCT) to compare vascular healing between bioresorbable polymer (BP) and durable polymer (DP) everolimus-eluting stents (EES) in patients with acute coronary syndromes (ACS). Background Whether BP-EES induce better vascular healing compared to contemporary DP-EES remains controversial, especially for ACS. Methods In this prospective, randomized, non-inferiority trial, we used OCT to compare 6-month vascular healing in patients with ACS randomized to ...
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    6. Clinical outcomes of low-intensity area without attenuation and cholesterol crystals in non-culprit lesions assessed by optical coherence tomography

      Clinical outcomes of low-intensity area without attenuation and cholesterol crystals in non-culprit lesions assessed by optical coherence tomography
      Background and aims Pathologists have shown that intraplaque hemorrhage contributes to plaque destabilization and is frequently co-located with cholesterol crystals (CC). Optical coherence tomography (OCT)-detected low-intensity area without attenuation (LIA) may represent intraplaque hemorrhage. We aimed to examine the prevalence and impact of OCT-detected LIA + CC in untreated non-culprit lesions (NCLs) on subsequent major adverse cardiac events (MACE). Methods OCT imaged NCLs in the culprit vessel in the patients ...
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    7. Multidimensional Data Processing for Optical Coherence Tomography Imaging (Thesis)

      Multidimensional Data Processing for Optical Coherence Tomography Imaging (Thesis)
      Optical Coherence Tomography (OCT) is a medical imaging technique which distinguishes itself by acquiring microscopic resolution images in-vivo at millimeter scale fields of view. The resulting in images are not only high-resolution, but often multi-dimensional to capture 3-D biological structures or temporal processes. The nature of multi-dimensional data presents a unique set of challenges to the OCT user that include acquiring, storing, and handling very large datasets, visualizing and understanding ...
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    8. Stage-dependent choriocapillaris impairment in Best vitelliform macular dystrophy characterized by optical coherence tomography angiography

      Stage-dependent choriocapillaris impairment in Best vitelliform macular dystrophy characterized by optical coherence tomography angiography
      Characterization of vascular impairment in Best vitelliform macular dystrophy (BVMD) is essential for the development of treatment modalities and therapy trials. As such, we seek to characterize the choriocapillaris (CC) at each stage of the disease process in 22 patients (44 eyes) with a diagnosis of BVMD confirmed by genetic sequencing. We utilize optical coherence tomography angiography (OCTA) images to characterize the CC and correlate our findings to the status ...
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    9. Assessing the impact of aging and blood pressure on dermal microvasculature by reactive hyperemia optical coherence tomography angiography

      Assessing the impact of aging and blood pressure on dermal microvasculature by reactive hyperemia optical coherence tomography angiography
      Visualization and quantification of the skin microvasculature are important for studying the health of the human microcirculation. We correlated structural and pathophysiological changes of the dermal capillary-level microvasculature with age and blood pressure by using the reactive hyperemia optical coherence tomography angiography (RH-OCT-A) technique and evaluated both conventional OCT-A and the RH-OCT-A method as non-invasive imaging alternatives to histopathology. This observational pilot study acquired OCT-A and RH-OCT-A images of the ...
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    10. Intracoronary optical coherence tomography: state of the art and future directions

      Intracoronary optical coherence tomography: state of the art and future directions
      Optical coherence tomography (OCT) has been increasingly utilised to guide percutaneous coronary intervention (PCI). Despite the diagnostic utility of OCT, facilitated by its high resolution, the impact of intracoronary OCT on clinical practice has thus far been limited. Difficulty in transitioning from intravascular ultrasound (IVUS), complex image interpretation, lack of a standardised algorithm for PCI guidance, and paucity of data from prospective clinical trials have contributed to the modest adoption ...
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    11. Retinal racemose hemangioma (retinal arteriovenous communication) diagnosed and managed with multimodal imaging

      Retinal racemose hemangioma (retinal arteriovenous communication) diagnosed and managed with multimodal imaging
      Purpose: Retinal racemose hemangioma (RRH) is a rare congenital abnormality of the retinal vasculature with a variety of secondary manifestations that can cause vision loss, including macular edema. This report aims to demonstrate the utility of swept-source optical coherence tomography angiography (SS-OCTA) in further characterizing this abnormality. Methods: Case report with multimodal imaging including SS-OCTA. Results: A 56-year-old woman with blurred vision was diagnosed macular edema secondary to RRH. Localization ...
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    12. Digital signal processor-based detection system, method, and apparatus for optical tomography

      Digital signal processor-based detection system, method, and apparatus for optical tomography
      The present invention provides systems, methods and apparatuses that perform digital detection for use in optical tomography. Methods and systems are provided in which digital lock-in detection is performed using an algorithm that employs a phase-independent quadrature technique. Methods and systems are provided in which a unique manipulation of an ordinary averaging filter optimized for sources discrimination and the consequent sampling constraints is presented as a novel filtering scheme for ...
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    13. Detecting Progression in Advanced Glaucoma: Are Optical Coherence Tomography Global Metrics Viable Measures?

      Detecting Progression in Advanced Glaucoma: Are Optical Coherence Tomography Global Metrics Viable Measures?
      Significance: Optical coherence tomography (OCT) summary measures have been suggested as a way to detect progression in eyes with advanced glaucoma. Here, we show that these measures have serious flaws largely due to segmentation errors. However, inspection of the images and thickness maps can be clinically useful. Purpose: This study aimed to test the hypothesis that recently suggested global OCT measures for detecting progression in eyes with advanced progression are ...
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    14. Nonlinearity of intracochlear motion and local cochlear microphonic: Comparison between guinea pig and gerbil

      Nonlinearity of intracochlear motion and local cochlear microphonic: Comparison between guinea pig and gerbil
      Studying the in-vivo mechanical and electrophysiological cochlear responses in several species helps us to have a comprehensive view of the sensitivity and frequency selectivity of the cochlea. Different species might use different mechanisms to achieve the sharp frequency-place map. The outer hair cells (OHC) play an important role in mediating frequency tuning. In the present work, we measured the OHC-generated local cochlear microphonic (LCM) and the motion of different layers ...
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    15. Strategies to Improve Convolutional Neural Network Generalizability and Reference Standards for Glaucoma Detection From OCT Scans

      Strategies to Improve Convolutional Neural Network Generalizability and Reference Standards for Glaucoma Detection From OCT Scans
      Purpose : To develop and evaluate methods to improve the generalizability of convolutional neural networks (CNNs) trained to detect glaucoma from optical coherence tomography retinal nerve fiber layer probability maps, as well as optical coherence tomography circumpapillary disc (circle) b-scans, and to explore impact of reference standard (RS) on CNN accuracy. Methods : CNNs previously optimized for glaucoma detection from retinal nerve fiber layer probability maps, and newly developed CNNs adapted for ...
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    16. 1-15 of 302 1 2 3 4 ... 18 19 20 »
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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.