1. All Articles

    22681-22704 of 24695 « 1 2 ... 943 944 945 946 947 948 949 ... 1027 1028 1029 »
    1. Interferometric Method And Instrument For Measurement And Monitoring Blood Glucose Through Measurement Of Tissue Refractive Index (Wo 2008/076228)

      Interferometric Method And Instrument For Measurement And Monitoring Blood Glucose Through Measurement Of Tissue Refractive Index (Wo 2008/076228)
      A method of measuring glucose concentration in tissue includes measuring scattering coefficients of the tissue at each of a plurality of temperatures and at a selected tissue depth using optical coherence tomography, and determining the glucose concentration in interstitial fluid of the tissue as a function of the measured scattering coefficients.
      Read Full Article
      Mentions: Newton Photonics
    2. Tracking retinal nerve fiber layer loss after optic neuritis: a prospective study using optical coherence tomography

      Introduction Optic neuritis causes retinal nerve fiber layer damage, which can be quantified with optical coherence tomography. Optical coherence tomography may be used to track nerve fiber layer changes and to establish a time-dependent relationship between retinal nerve fiber layer thickness and visual function after optic neuritis. Methods This prospective case series included 78 patients with optic neuritis, who underwent optical coherence tomography and visual testing over a mean period of 28 months. The main outcome measures included comparing inter-eye differences in retinal nerve fiber layer thickness between clinically affected and non-affected eyes over time; establishing when RNFL thinning stabilized ...

      Read Full Article
    3. Retinal nerve fiber layer atrophy is associated with physical and cognitive disability in multiple sclerosis.

      Background Studying axonal loss in the retina is a promising biomarker for multiple sclerosis (MS). Our aim was to compare optical coherence tomography (OCT) and Heidelberg retinal tomography (HRT) techniques to measure the thickness of the retinal nerve fiber layer (RNFL) in patients with MS, and to explore the relationship between changes in the RNFL thickness with physical and cognitive disability. We studied 52 patients with MS and 18 proportionally matched controls by performing neurological examination, neuropsychological evaluation using the Brief Repetitive Battery-Neuropsychology and RNFL thickness measurement using OCT and HRT. Results We found that both OCT and HRT could ...
      Read Full Article
    4. Quantitative Subanalysis of Optical Coherence Tomography after Treatment with Ranibizumab for Neovascular Age-Related Macular Degeneration

      PURPOSE. To investigate the effects of ranibizumab on retinal morphology in patients with neovascular age-related macular degeneration (AMD) using optical coherence tomography (OCT) quantitative subanalysis. METHODS. Data from 95 patients receiving intravitreal ranibizumab for neovascular AMD were collected. StratusOCT images were analyzed using custom software that allows precise positioning of prespecified boundaries on every B-scan. Changes in thickness/volume of the retina, subretinal fluid (SRF), subretinal tissue (SRT), and pigment epithelial detachments (PEDs) at week 1 and at months 1, 3, 6, and 9 after treatment were calculated. RESULTS. Total retinal volume reached its nadir at month 1, with an ...

      Read Full Article
    5. Mapping Standard Automated Perimetry to the Peripapillary Retinal Nerve Fiber Layer in Glaucoma

      purpose. To establish a map relating visual field (VF) test points to corresponding areas of the retinal nerve fiber layer (RNFL) measured with optical coherence tomography (OCT) in patients with glaucomatous optic neuropathy.methods. One hundred four consecutive subjects with open-angle glaucoma were prospectively selected. All subjects underwent standard automated perimetry (SAP) and imaging with OCT. Factor analyses of the mean thresholds for the SAP test points were performed, independently for each hemifield, to define regions of related points. Pearson correlations were then calculated between the VF regions and peripapillary RNFL thickness measured with OCT at each of the 12 ...

      Read Full Article
    6. Morphologic Changes in Patients with Geographic Atrophy Assessed with a Novel Spectral OCT-SLO Combination

      purpose. To investigate the appearance of geographic atrophy in high-resolution optical coherence tomography (OCT) images, the fundus autofluorescence (FAF) pattern, and infrared images simultaneously recorded with a novel combined OCT-scanning laser ophthalmology (SLO) system. methods. Patients aged over 50 years with geographic atrophy secondary to dry age-related macular degeneration (ARMD) were assessed in a prospective cross-sectional study by means of simultaneous spectral OCT-SLO (Spectralis HRA+OCT; Heidelberg Engineering, Heidelberg, Germany). The integrity of the retinal layers was analyzed in the apparently normal areas, the junctional zone between the normal retina and the geographic atrophy, and the atrophic area. The presence ...

      Read Full Article
    7. Evidence of Retinal Function Using Microperimetry following Autologous Retinal Pigment Epithelium-Choroid Graft in Macular Dystrophy

      purpose. To describe the outcomes of autologous retinal pigment epithelium (RPE)-choroid graft in macular dystrophy. methods. In this prospective interventional case series, five patients with macular dystrophy were enrolled to undergo autologous RPE-choroid patch graft between August 2005 and January 2007. All patients received preoperative and postoperative evaluations including visual acuity, contrast sensitivity, reading ability, microperimetry, fluorescein angiography, indocyanine green angiography, fundus autofluorescence (AF) imaging, and optical coherence tomography (OCT). results. Patients were followed up for an average of 13.4 (9–23) months. Two patients gained reading acuity but only one regained visual task function after graft. This ...

      Read Full Article
      Mentions: Fred K. Chen
    8. Realization of extremely broadband quantum-dot superluminescent light-emitting diodes by rapid thermal-annealing process

      The first demonstration, to our knowledge, of the creation of ultrabroadband superluminescent light-emitting diodes using multiple quantum-dot layer structure by rapid thermal-annealing process is reported. The device exhibits a 3 dB emission bandwidth of 146 nm centered at 984 nm with cw output power as high as 15 mW at room temperature corresponding to an extremely small coherence length of 6.6 μm.
      Read Full Article
    9. Imalux Collaborates with Preventative Oncology International™ in Study of Cervical Cancer in China

      Imalux Collaborates with Preventative Oncology International™ in Study of Cervical Cancer in China

      Dr. Jerome Belinson, a leading researcher ingynecological cancers, and his team from Preventative Oncology International™ (POI),along with Dr. Nancy Tresser, Chief Medical Officer of Imalux Corporation, recentlycollaborated in a controlled 299 patient study of cervical cancer in China.Cervical cancer is the second greatest cause of cancer deaths in women world-wide. It isdirectly linked to the high-risk types of the Human Papillomavirus (HPV). While the currentstandard for cervical cancer diagnosis in the US is based upon the Pap test, the link betweencervical cancer and HPV has made it possible to identify patients at high risk of cervicalcancer by testing ...

      Read Full Article
    10. OCT Technical Analyst (Durham)

      Optical Coherence tomography (OCT) is an exciting non-invasive, cutting edge technology that allows one to evaluate the anatomy and thickness characteristics of the retina in real-time in the living organism. It can be thought of as a form of in vivo histology. Increasingly, optical coherence tomography has been used by clinicians to help diagnose and manage a variety of ocular disorders, including macular degeneration, diabetic retinopathy, and glaucoma, the leading causes of blindness in the United States and around the world. There has been an explosion of interest by pharmaceutical companies to develop new treatments for macular degeneration, diabetic retinopathy ...
      Read Full Article
      Mentions: Duke University
    11. Coherence Tomography Following Paclitaxel Eluting Stent Implantation in Multivessel Coronary Artery Disease (OCTAXUS)

      A prospective Optical Coherence Tomography (OCT) study on the completeness of strut coverage and vessel wall response, at different time points (3-6-9 Months), following TAXUS Liberte stent implantation (staged procedures) in patients with multi vessel native coronary artery lesions. Major concerns were addressed to the delayed healing process of drug-eluting stents in off-label indications. To date no studies have detailed the in-vivo completeness of DES coverage at different time points. The objective of this prospective study is to measure the completeness of strut coverage and vessel wall response (neointima disomogeneity, acquired late incomplete strut apposition) at different time points following ...
      Read Full Article
    12. Comparison of Neointimal Coverage by Optical Coherence Tomography of a Sirolimus-Eluting Stent Versus a Bare-Metal Stent Three Months After Implantation

      No detailed data regarding neointimal coverage of bare-metal stents (BMSs) at 3 months after implantation was reported to date. This investigation was designed to evaluate the neointimal coverage of BMSs compared with sirolimus-eluting stents (SESs) using optical coherence tomography. A prospective optical coherence tomographic follow-up examination was performed 3 months after stent implantation for patients who underwent BMS (n = 16) or SES implantation (n = 24). Neointimal hyperplasia (NIH) thickness on each stent strut and percentage of NIH area in each cross section were measured. Malapposition of stent struts to the vessel wall and the existence of in-stent thrombi were also ...
      Read Full Article
    13. Gold Nanocages: Synthesis, Properties, and Applications

      Noble-metal nanocages comprise a novel class of nanostructures possessing hollow interiors and porous walls. They are prepared using a remarkably simple galvanic replacement reaction between solutions containing metal precursor salts and Ag nanostructures prepared through polyol reduction. The electrochemical potential difference between the two species drives the reaction, with the reduced metal depositing on the surface of the Ag nanostructure. In our most studied example, involving HAuCl4 as the metal precursor, the resultant Au is deposited epitaxially on the surface of the Ag nanocubes, adopting their underlying cubic form. Concurrent with this deposition, the interior Ag is oxidized and removed ...
      Read Full Article
    14. Gold Nanocages: Synthesis, Properties, and Applications.

      Gold Nanocages: Synthesis, Properties, and Applications. Acc Chem Res. 2008 Jun 21; Authors: Skrabalak SE, Chen J, Sun Y, Lu X, Au L, Cobley CM, Xia Y Noble-metal nanocages comprise a novel class of nanostructures possessing hollow interiors and porous walls. They are prepared using a remarkably simple galvanic replacement reaction between solutions containing metal precursor salts and Ag nanostructures prepared through polyol reduction. The electrochemical potential difference between the two species drives the reaction, with the reduced metal depositing on the surface of the Ag nanostructure. In our most studied example, involving HAuCl 4 as the metal precursor, the ...
      Read Full Article
    15. Meridional differences in internal dimensions of the anterior segment in human eyes evaluated with 2 imaging systems.

      PURPOSE: To evaluate meridional differences in angle-to-angle (A-A) and sulcus-to-sulcus (S-S) dimensions in human eyes using very high frequency ultrasound (VHF US) and anterior segment optical coherence tomography (AS-OCT). SETTING: John A. Moran Eye Center, University of Utah, USA; Berlin Eye Research Institute, Germany; Quattroelle Centri Oftalmochirurgici, Italy. METHODS: Human autopsy eyes were fixated to special eye holders and had anterior segment scanning using 50 MHz ultrasound (Artemis, Ultralink) (20 eyes) and AS-OCT (SL-OCT, Heidelberg Engineering) (24 eyes). Seventy-three eyes (58 patients) also had anterior segment scanning using the same systems (Artemis, 50 eyes; SL-OCT, 23 eyes). Four meridians were ...
      Read Full Article
    16. High-power SLED delivers broad spectrum

      A superluminescent LED has for the first time been engineered to exhibit high output power as well as a broadband emission spectrum. By carefully controlling the annealing process parameters, a team from the UK and China has successfully fabricated a quantum-dot (QD) based SLED that has the sought-after combination of high output power and broadband emission. The novel emitter has a bandwidth of 146 nm and a continuous-wave output power of 15 mW at room temperature (Optics Letters 33 1210). "Although similar bandwidths have been reported at longer wavelengths, we have achieved a broad emission spectrum centered at 980 nm ...
      Read Full Article
    17. Sun-loving frogs aid fungus fight

      Sun-loving frogs aid fungus fight
      Sunbathing tree frogs may hold the key to understanding how a deadly fungus is wiping out amphibians around the world. The chytrid fungus has been implicated in many amphibian extinctions. Now scientists are using non-invasive imaging technology to find out how some frogs from Central America may be able to beat this deadly disease. They believe that the frogs' unusual skin is allowing the animals to bask in hot sunlight, possibly boosting their temperatures to kill off the fungus
      Read Full Article
    22681-22704 of 24695 « 1 2 ... 943 944 945 946 947 948 949 ... 1027 1028 1029 »
  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. Popular Articles

  3. Optical Coherence Tomography News

    See all Optical Coherence Tomography News articles
  4. Organizations in the News

    1. (779 articles) Harvard University
    2. (643 articles) Massachusetts General Hospital
    3. (637 articles) National Institutes of Health
    4. (570 articles) Massachusetts Institute of Technology
    5. (481 articles) Duke University
    6. (418 articles) Medical University of Vienna
    7. (407 articles) University of Miami
    8. (384 articles) Johns Hopkins University
    9. (379 articles) Oregon Health & Science University
    10. (359 articles) FDA
  5. People in the News

    1. (398 articles) James G. Fujimoto
    2. (317 articles) David Huang
    3. (274 articles) Ruikang K. Wang
    4. (270 articles) Joseph A. Izatt
    5. (228 articles) Guillermo J. Tearney
    6. (220 articles) Stephen A. Boppart
    7. (217 articles) Adrian G. Podoleanu
    8. (211 articles) Zhongping Chen
    9. (198 articles) Brett E. Bouma
    10. (188 articles) Patrick W. Serruys
  6. OCT Companies in the News

    1. (1617 articles) Carl Zeiss Meditec
    2. (799 articles) St. Jude Medical
    3. (651 articles) Heidelberg Engineering
    4. (640 articles) Optovue
    5. (426 articles) Topcon Medical Systems
    6. (332 articles) Volcano Corporation
    7. (255 articles) Michelson Diagnostics
    8. (231 articles) Thorlabs
    9. (226 articles) Bioptigen
    10. (155 articles) Canon Medical Systems