1. Nanyang Technological University

    0 Comments Leave a Comment

    1-15 of 78 1 2 3 4 5 6 »
    1. Mentioned In 78 Articles

    2. Multiscale skin imaging in vivo using optical coherence tomography

      Multiscale skin imaging in vivo using optical coherence tomography
      Optical coherence tomography (OCT) is a noninvasive high-resolution diagnostic imaging modality that plays an increasingly important role in dermatology. Diagnosis of skin diseases using OCT requires both cellular-level high resolution and large area skin coverage. In practice, however, there exists a trade-off between the achievable spatial resolutions and the transverse scanning range. In this study, we report a Micro-OCT ( OCT) system that is capable of providing three-dimensional images of the ...
      Read Full Article
    3. Evaluating micro-optical coherence tomography (μOCT) as a feasible imaging tool for pancreatic disease diagnosis

      Evaluating micro-optical coherence tomography (μOCT) as a feasible imaging tool for pancreatic disease diagnosis
      Pancreatic cancer is one of the leading causes of cancer mortality worldwide due to the lack of reliable tools for early diagnosis of this cancer. In this study, we evaluated the feasibility of micro-optical coherence tomography (OCT) as an imaging tool for the diagnosis of pancreatic cancers. Specifically, we constructed a OCT device that achieves a resolution of 1.67 m and 1.79 m in axial and lateral directions ...
      Read Full Article
    4. Extending axial focus of optical coherence tomography using parallel multiple aperture synthesis

      Extending axial focus of optical coherence tomography using parallel multiple aperture synthesis
      Compromising the inherent trade-off between transverse resolution and depth of focus (DOF) remains a long-standing issue in optical coherence tomography (OCT). In this work, we report a novel techniqueparallel multiple aperture synthesis (pMAS) to simultaneously generate multiple optical apertures in an OCT sample arm by employing a two-surface coated mirror. In the proposed pMAS, the DOF is extended by a factor of 16.49 without sacrificing the transverse resolution for ...
      Read Full Article
    5. Tunable optical coherence tomography in the infrared range using visible photons

      Tunable optical coherence tomography in the infrared range using visible photons
      Optical coherence tomography (OCT) is an appealing technique for bio-imaging, medicine, and material analysis. For many applications, OCT in mid- and far-infrared (IR) leads to significantly more accurate results. Reported mid-IR OCT systems require light sources and photodetectors which operate in mid-IR range. These devices are expensive and need cryogenic cooling. Here, we report a proof-of-concept demonstration of a wavelength tunable IR OCT technique with detection of only visible range ...
      Read Full Article
    6. Pixel-Reassigned Spectral-Domain Optical Coherence Tomography

      Pixel-Reassigned Spectral-Domain Optical Coherence Tomography
      A novel method of pixel reassignment (PRA) is proposed to achieve transverse superresolution in the confocal microscopy. Inspired by it, for the first time, we report a pixel-reassigned spectral-domain optical coherence tomography (OCT) with 1.5 times transverse resolution improvement both in numerical simulations and imaging experiments. PRA is implemented by transversely shifting the detection fiber from the on-axis position to five off-axis positions, capturing cross-sectional images at each shifting ...
      Read Full Article
    7. PhD Student Opening in Functional Optical Imaging Employing Contrast Agents at the Medical University of Vienna

      PhD Student Opening in Functional Optical Imaging Employing Contrast Agents at the Medical University of Vienna
      ...ding for 3 years. The student will work for two years at the Medical University of Vienna and one year at the Nanyang Technological University in Singapore. A Master’s degree in veterinary medicine, biology, biochemistry...
      Read Full Article
    8. Multiple aperture synthetic optical coherence tomography for biological tissue imaging

      Multiple aperture synthetic optical coherence tomography for biological tissue imaging
      An inherent compromise must be made between transverse resolution and depth of focus (DOF) in spectral domain optical coherence tomography (SD-OCT). Thus far, OCT has not been capable of providing a sufficient DOF to stably acquire cellular-resolution images. We previously reported a novel technique named multiple aperture synthesis (MAS) to extend the DOF in high-resolution OCT [Optica4, 701 (2017)]. In this technique, the illumination beam is scanned across the objective ...
      Read Full Article
    9. Optical coherence tomography angiography: a review of current and future clinical applications

      Optical coherence tomography angiography: a review of current and future clinical applications
      Optical coherence tomography angiography is a non-invasive imaging technique that now allows for simultaneous in vivo imaging of the morphology as well as the vasculature in the eye. In this review, we provide an update on the existing clinical applications of optical coherence tomography angiography technology from the anterior to posterior segment of the eye. We also discuss the limitations of optical coherence tomography angiography technology, as well as the ...
      Read Full Article
    10. Analyzing external and internal membrane fouling by oil emulsions via 3D optical coherence tomography

      Analyzing external and internal membrane fouling by oil emulsions via 3D optical coherence tomography
      Membrane-based filtration is an emerging technique for processing oily wastewater. Improving the efficiency of oil-water separation via membranes entails novel techniques for studying the complex interactions between the oil droplets and membrane underlying fouling. This paper presents the first study that applies optical coherence tomography (OCT) to the characterization of membrane fouling by oil emulsions. A series of dead-end filtration experiments was performed to characterize the rejection of oil droplets ...
      Read Full Article
    11. Tunable Optical Coherence Tomography in the Infrared Range Using Visible Photons

      Tunable Optical Coherence Tomography in the Infrared Range Using Visible Photons
      We report a proof-of-concept demonstration of a tunable infrared (IR) optical coherence tomography (OCT) technique with detection of only visible range photons. Our method is based on the nonclassical interference of frequency correlated photon pairs. The nonlinear crystal, introduced in the Michelson-type interferometer, generates photon pairs with one photon in the visible and another in the IR range. The intensity of detected visible photons depends on the phase and loss ...
      Read Full Article
    12. Comparison of anterior segment optical coherence tomography angiography systems for corneal vascularisation

      Comparison of anterior segment optical coherence tomography angiography systems for corneal vascularisation
      Aim To newly describe a spectral-domain (SD) optical coherence tomography angiography (OCTA) for the cornea and directly compare two OCTA system scans of the same eyes with corneal vascularisation. Methods Cross-sectional, observational, comparative case series. We performed sequential OCTA scans (10 eyes of 10 subjects with corneal vascularisation,4 scans each eye) repeated using split-spectrum amplitude decorrelation algorithm angiography system (SSADA, AngioVue; Optovue Inc, USA) and SD OCTA (Angioscan; Nidek ...
      Read Full Article
    13. Mapping Retinal and Choroidal Thickness in Unilateral Nongranulomatous Acute Anterior Uveitis Using Three-Dimensional 1060-nm Optical Coherence Tomography

      Mapping Retinal and Choroidal Thickness in Unilateral Nongranulomatous Acute Anterior Uveitis Using Three-Dimensional 1060-nm Optical Coherence Tomography
      Purpose : To analyze retinal thickness (RT) and choroidal thickness (ChT) changes in patients with unilateral nongranulomatous acute anterior uveitis (AAU) using three-dimensional (3D) 1060-nm optical coherence tomography (OCT). Methods : Retinal and choroidal thickness maps were statistically analyzed for 24 patients with newly diagnosed unilateral AAU before therapy. A total of 17 patients were followed until resolution of inflammatory activity (twice in the first week, then weekly). Resolution occurred in all ...
      Read Full Article
    14. Visualizing Micro-anatomical Structures of the Posterior Cornea with Micro-optical Coherence Tomography

      Visualizing Micro-anatomical Structures of the Posterior Cornea with Micro-optical Coherence Tomography
      Diagnosis of corneal disease and challenges in corneal transplantation require comprehensive understanding of corneal anatomy, particularly that of the posterior cornea. Micro-optical coherence tomography (OCT) is a potentially suitable tool to meet this need, owing to its ultrahigh isotropic spatial resolution, high image acquisition rate and depth priority scanning mode. In this study, we explored the ability of OCT to visualize micro-anatomical structures of the posterior cornea ex vivo and ...
      Read Full Article
    15. Endomicroscopic optical coherence tomography for cellular resolution imaging of gastrointestinal tracts

      Endomicroscopic optical coherence tomography for cellular resolution imaging of gastrointestinal tracts
      Our ability to detect neoplastic changes in gastrointestinal (GI) tracts is limited by the lack of an endomicroscopic imaging tool that provides cellular-level structural details of GI mucosa over a large tissue area. In this paper, we report a fiber-optic based micro-optical coherence tomography (OCT) system and demonstrate its capability to acquire cellular-level details of GI tissue through circumferential scanning. The system achieves an axial resolution of 2.48m in ...
      Read Full Article
    16. Polarization management to mitigate misalignment-induced fringe fading in fiber-based optical coherence tomography

      Polarization management to mitigate misalignment-induced fringe fading in fiber-based optical coherence tomography
      In fiber-based optical coherence tomography (OCT), the interference fringes suffer from the fading effect due to misalignment of the light polarization states between the reference and sample arms, resulting in sensitivity degradation and image intensity variation. We theoretically and experimentally analyzed the relation between the misalignment and the fading coefficient. Assuming that the variation of the light polarization in single-mode fiber (SMF) was a random process, we statistically quantified the ...
      Read Full Article
    17. 1-15 of 78 1 2 3 4 5 6 »
  1. Categories

    1. Applications:

      Art, Cardiology, Dentistry, Dermatology, Developmental Biology, Gastroenterology, Gynecology, Microscopy, NDE/NDT, Neurology, Oncology, Ophthalmology, Other Non-Medical, Otolaryngology, Pulmonology, Urology
    2. Business News:

      Acquisition, Clinical Trials, Funding, Other Business News, Partnership, Patents
    3. Technology:

      Broadband Sources, Probes, Tunable Sources
    4. Miscellaneous:

      Jobs & Studentships, Student Theses, Textbooks
  2. About Nanyang Technological University

    Nanyang Technological University

    Nanyang Technological University (NTU is an internationally reputed research-intensive tertiary institution. Our broad-based education covers science and technology, business and the arts, entrepreneurial and leadership skills to prepare students for the global working world.