Articles that mention University of Western Australia -Optical Coherence Tomography News

University of Western Australia

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1. Mentioned In 183 Articles
2. Handheld optical palpation of turbid tissue with motion-artifact correction
  
  Explore OSA | OSA Publishing Jan 7 2019
  
  Handheld imaging probes are needed to extend the clinical translation of optical elastography to in vivo applications, yet such probes have received little attention. In this paper, we present the first demonstration of optical palpation using a handheld probe. Optical palpation is a variant of optical elastography that uses three-dimensional optical coherence tomography (3D-OCT) to provide maps of stress at the tissue surface under static compression. Using this technique, stiff ...
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  Mentions: University of Western Australia Andrea Curatolo Brendan F. Kennedy
3. Branch Retinal Vein Occlusion Secondary To A Retinal Arteriolar Macroaneurysm: A Novel Mechanism Supported By Multimodal Imaging
  
  Explore LWW Online Jan 1 2019 Ophthalmology
  
  Background/Purpose: To report a case of a branch retinal vein occlusion secondary to a retinal arteriolar macroaneurysm (RAM). Methods: Retrospective case report describing examination findings, treatment outcome and unique multimodal imaging features demonstrated on fluorescein angiography, optical coherence tomography, optical coherence tomography angiography and adaptive optics photography of the retinal vessels and RAM. Results: A 61-year-old man presented with 20/200 vision in the right eye because of a ...
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  Mentions: University of Western Australia
4. Short-time series optical coherence tomography angiography and its application to cutaneous microvasculature
  
  Explore OSA | OSA Publishing Dec 26 2018 Dermatology
  
  We present a new optical coherence tomography (OCT) angiography method for imaging tissue microvasculature in vivo based on the characteristic frequency-domain flow signature in a short time series of a single voxel. The angiography signal is generated by Fourier transforming the OCT signal time series from a given voxel in multiple acquisitions and computing the average magnitude of non-zero (high-pass) frequency components. Larger temporal variations of the OCT signal caused ...
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  Mentions: David D. Sampson University of Western Australia Qiang Wang
5. Research Fellow Opening at University of Western Australia
  
  Explore Optical Coherence Tomography News Oct 29 2018 Jobs & Studentships
  
  ...hematical Sciences School of Engineering Department of Electrical, Electronic and Computer Engineering The University of Western Australia (UWA) is ranked amongst the top 100 universities in the world and a member of ...
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  Mentions: University of Western Australia Sir Charles Gairdner Hospital Brendan F. Kennedy
6. Robust reconstruction of local optic axis orientation with fiber-based polarization-sensitive optical coherence tomography
  
  Explore OSA | OSA Publishing Oct 24 2018
  
  It is challenging to recover local optic axis orientation from samples probed with fiber-based polarization-sensitive optical coherence tomography (PS-OCT). In addition to the effect of preceding tissue layers, the transmission through fiber and system elements, and imperfect system alignment, need to be compensated. Here, we present a method to retrieve the required correction factors from measurements with depth-multiplexed PS-OCT, which accurately measures the full Jones matrix. The correction considers both ...
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  Mentions: Harvard University David D. Sampson University of Western Australia
7. Retinal imaging with optical coherence tomography and low‐loss adaptive optics using a 2.8‐mm beam size
  
  Explore Wiley Online Library Oct 17 2018 Ophthalmology
  
  As data acquisition for retinal imaging with optical coherence tomography (OCT) becomes faster, efficient collection of photons becomes more important to maintain image quality. One approach is to use a larger aperture at the eyes pupil to collect more photons that have been reflected from the retina. A 2.8‐mm beam diameter system with only 7 reflecting surfaces was developed for low‐loss retinal imaging. The larger beam size ...
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  Mentions: University of Western Australia Barry Cense
8. Two-photon polymerisation 3D printed freeform micro-optics for optical coherence tomography fibre probes
  
  Explore Nature Publishing Group Oct 9 2018 Probes
  
  Miniaturised optical coherence tomography (OCT) fibre-optic probes have enabled high-resolution cross-sectional imaging deep within the body. However, existing OCT fibre-optic probe fabrication methods cannot generate miniaturised freeform optics, which limits our ability to fabricate probes with both complex optical function and dimensions comparable to the optical fibre diameter. Recently, major advances in two-photon direct laser writing have enabled 3D printing of arbitrary three-dimensional micro/nanostructures with a surface roughness acceptable ...
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  Mentions: David D. Sampson University of Western Australia Robert A. McLaughlin
9. Professor Andrzej Kowalczyk Celebration Gala
  
  Explore Optical Coherence Tomography News Sep 24 2018
  
  ...dzki (UC Davis, USA), Michalina Gora (CNRS, Strasbourg, FR), and Danuta Sampson (University of Surrey, UK and University of Western Australia). The meeting was made possible by the generous support of the Aleksander Jabł...
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  Mentions: National Institutes of Health Adrian G. Podoleanu University of Kent
10. Posterior Choroidal Stroma Reduces Accuracy of Automated Segmentation of Outer Choroidal Boundary in Swept Source Optical Coherence Tomography
  
  Explore IOVS Journal Sep 8 2018 Ophthalmology
  
  Purpose : To determine the influence of choroidal boundary morphology on the accuracy of automated measurements of subfoveal choroidal thickness (SFCT) in swept source optical coherence tomography (SSOCT). Methods : A retrospective image analysis of foveal-centered horizontal line scans from normal and diseased eyes using the Topcon DRI OCT-1 Atlantis SSOCT was conducted. Subfoveal choroid-scleral junction (CSJ) and retina-choroidal junction (RCJ) morphologies were graded by two observers. Automated SFCT (A-SFCT) was compared ...
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  Mentions: Topcon Medical Systems University of Western Australia University of Sydney
11. Imaging Of Pigment Epithelial Detachments With Optical Coherence Tomography Angiography
  
  Explore LWW Online Aug 22 2018 Ophthalmology
  
  Purpose: To investigate the utility of optical coherence tomography angiography (OCTA) for detecting pathologic vascularization within pigment epithelial detachments (PEDs). Methods: This was a retrospective, cross-sectional, consecutive case series. Multimodal imaging (structural OCT, fluorescein, and indocyanine green angiography) was used as the gold standard to classify PEDs as nonvascularized or vascularized. Optical coherence tomography angiography imaging of the PED was subsequently and independently evaluated to classify PEDs as vascularized or ...
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  Mentions: Singapore Eye Research Institute LuEsther T. Mertz Retinal Research Center University of Western Australia
12. Postdoc Position in Biomedical Optics and Photonics at University of Western Australia
  
  Explore Optical Coherence Tomography News Aug 1 2018 Jobs & Studentships
  
  ...: see http://www.obel.ee.uwa.edu.au or email Prof David Sampson David.Sampson@uwa.edu.au. About Perth The University of Western Australia occupies a picturesque setting by the Swan River five minutes from downtown Pe...
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  Mentions: David D. Sampson University of Western Australia
13. Optical palpation for the visualization of tumor in human breast tissue
  
  Explore Wiley Online Library Jul 28 2018 Oncology
  
  Accurate and effective removal of tumor in one operation is an important goal of breast‐conserving surgery. However, it is not always achieved. Surgeons often utilize manual palpation to assess the surgical margin and/or the breast cavity. Manual palpation, however, is subjective and has relatively low‐resolution. Here, we investigate a tactile imaging technique, optical palpation, for the visualization of tumor. Optical palpation generates maps of the stress at ...
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  Mentions: University of Western Australia Brendan F. Kennedy
14. Label‐free volumetric imaging of conjunctival collecting lymphatics ex vivo by optical coherence tomography lymphangiography
  
  Explore Wiley Online Library Jun 19 2018
  
  We employ optical coherence tomography (OCT) and optical coherence microscopy (OCM) to study conjunctival lymphatics in porcine eyes ex vivo . This study is a precursor to the development of in vivo imaging of the collecting lymphatics for potentially guiding and monitoring glaucoma filtration surgery. OCT scans at 1300 nm and higher‐resolution OCM scans at 785 nm reveal the lymphatic vessels via their optical transparency. Equivalent signal characteristics are also ...
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  Mentions: David D. Sampson University of Western Australia Qiang Wang
15. Photonic force optical coherence elastography for three-dimensional mechanical microscopy
  
  Explore Nature Publishing Group Jun 15 2018
  
  Optical tweezers are an invaluable tool for non-contact trapping and micro-manipulation, but their ability to facilitate high-throughput volumetric microrheology of biological samples for mechanobiology research is limited by the precise alignment associated with the excitation and detection of individual bead oscillations. In contrast, radiation pressure from a low-numerical aperture optical beam can apply transversely localized force over an extended depth range. Here we present photonic force optical coherence elastography (PF-OCE ...
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  Mentions: Cornell University University of Western Australia Steven G. Adie
16. Realistic simulation and experiment reveals the importance of scatterer microstructure in optical coherence tomography image formation
  
  Explore OSA | OSA Publishing Jun 15 2018
  
  Realistic simulation of image formation in optical coherence tomography, based on Maxwells equations, has recently been demonstrated for sample volumes of practical significance. Yet, there remains a limitation whereby reducing the size of cells used to construct a computational grid, thus allowing for a more realistic representation of scatterer microstructure, necessarily reduces the overall sample size that can be modelled. This is a significant problem since, as is well known ...
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  Mentions: University College London David D. Sampson Nicolaus Copernicus University
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