Categories: Bronchoscopy, Cardiology, Dentistry, Dermatology, Endoscopy, Glucose, Microscopy, Non-Medical, Ophthalmology, Acquisition, Funding, Jobs & Studentships, Partnership, Patents
Retinal Nerve Fiber Layer Measures in High- and Normal-Tension Glaucoma.
NCBI HomePage (Jul 3 2008)
Ophthalmology
Retinal Nerve Fiber Layer Measures in High- and Normal-Tension Glaucoma. Optom Vis Sci. 2008 Jul;85(7):538-542 Authors: Konstantakopoulou E, Reeves BC, Fenerty C, Harper RA PURPOSE.: To use optical coherence tomography (OCT) to investigate the qualitative and quantitative differences in the defects of the retinal nerve fiber layer (RNFL) in subjects with high tension primary open angle glaucoma and subjects with normal tension glaucoma. METHODS.: RNFL was assessed with OCT in ...
Phase-resolved Doppler optical coherence tomography-limitations and improvements.
NCBI HomePage (Jul 3 2008)
Phase-resolved Doppler optical coherence tomography-limitations and improvements. Opt Lett. 2008 Jul 1;33(13):1425-7 Authors: Szkulmowska A, Szkulmowski M, Kowalczyk A, Wojtkowski M We describe how the simple phase difference averaging causes a systematic bias in the velocity estimation obtained by phase-resolved Fourier domain optical coherence tomography (FdOCT). The magnitude of this bias depends on the signal-to-noise ratio as well as proximity of the measured velocity to the limits of the velocity ...
Speckle variance detection of microvasculature using swept-source optical coherence tomography.
NCBI HomePage (Jul 3 2008)
Cardiology
Speckle variance detection of microvasculature using swept-source optical coherence tomography. Opt Lett. 2008 Jul 1;33(13):1530-2 Authors: Mariampillai A, Standish BA, Moriyama EH, Khurana M, Munce NR, Leung MK, Jiang J, Cable A, Wilson BC, Vitkin IA, Yang VX We report on imaging of microcirculation by calculating the speckle variance of optical coherence tomography (OCT) structural images acquired using a Fourier domain mode-locked swept-wavelength laser. The algorithm calculates interframe speckle variance ...
Ultrahigh resolution optical coherence tomography with femtosecond Ti:sapphire laser and photonic crystal fiber
SpringerLink Home (Jul 2 2008)
Abstract Optical coherence tomography (OCT) with ultrahigh axial resolution was achieved by the super-continuum generated by coupling femtosecond pulses from a commercial Ti: sapphire laser into an air-silica microstructure fiber. The visible spectrum of the super-continuum from 450 to 700 nm centered at 540 nm can be generated. A free-space axial OCT resolution of 0.64 µm was achieved. The sensitivity of OCT system was 108 dB with incident light power 3 ...
Compact Er:Yb:glass-laser-based supercontinuum source for high-resolution optical coherence tomography
opticsinfobase.org (Jul 1 2008)
M. C. Stumpf, S. C. Zeller, A. Schlatter, T. Okuno, T. Südmeyer, U. Keller. We present a low coherence light source by direct super-continuum generation from a diode-pumped, passively modelocked Er:Yb:glass-laser, which generates 198 fs transform-limited pulses with an average power of 100 mW at a repetition rate of 75 MHz. The pulse train is launched into a dispersion ... [Opt. Express 16, 10572-10579 (2008)]
Real-time swept source optical coherence tomography imaging of the human airway using a microelectromechanical system endoscope and digital signal processor
SPIE Digital Library (Jul 1 2008)
Bronchoscopy,
Endoscopy
Jianping Su, Jun Zhang, Lingfeng Yu et al. A fast-scan-rate swept laser for optical coherence tomography (OCT) is suitable to record and analyze a 3-D image volume. However, the whole OCT system speed is limited by data streaming, processing, and storage. In this case, postprocessing is a common technique. Endoscopic clinical applications pr ... [J. Biomed. Opt. 13, 030506 (2008)] published Tue Jul 1, 2008.
Experts debate best first-line treatment for diabetic retinopathy
Ophthalmology (Jul 1 2008)
Ophthalmology
HONG KONG — A panel of retina experts at the World Ophthalmology Congress here debated the merits of laser, anti-VEGF and triamcinolone treatment for diabetic retinopathy.
Comparison of the Optical Coherence Tomographic Features of Choroidal Neovascular Membranes in Pathologic Myopia versus Age-Related Macular Degeneration, using Quantitative Subanalysis.
NCBI HomePage (Jul 1 2008)
Ophthalmology
Comparison of the Optical Coherence Tomographic Features of Choroidal Neovascular Membranes in Pathologic Myopia versus Age-Related Macular Degeneration, using Quantitative Subanalysis. Br J Ophthalmol. 2008 Jun 27; Authors: Keane PA, Liakopoulos S, Chang KT, Heussen FM, Ongchin SC, Walsh AC, Sadda SR Aim: To compare the retinal morphologic characteristics of eyes with choroidal neovascularization (CNV) secondary to pathologic myopia versus eyes with CNV secondary to age-related macular degeneration (AMD), using ...
Dr. Craig Gimbel, Executive Vice President of Clinical Affairs for Lantis Laser [video]
TV.WallSt.net (Jul 1 2008)
Dentistry
Lantis was formed to commercialize the application of novel technologies in the dental industry. The criteria for selected products include competitive edge, exclusivity and large market potential. Lantis is currently in Phase 2 and Phase 3 development, moving through beta systems, product development and application for FDA clearance and plans to launch the OCT Dental Imaging System(tm) in the first quarter of 2009. Lantis has exclusive rights to the application ...
Method and arrangement for optical coherence tomography
PatFT, AppFT (Jul 1 2008)
Patents
FIELD OF THE INVENTION The present invention relates to the field of medical imaging, and more particularly to optical coherence tomography (OCT). BACKGROUND AND PRIOR ARTOCT is a known technique for non invasive cross-sectional imaging in biological systems. OCT uses coherence interferometry to produce a two-dimensional image of optical scattering from internal tissue micro structures in a way that is analogueto ultra sonic pulse-echo imaging.In coherence reflectrometry, the coherence property ...
Method and apparatus for full phase interferometry
PatFT, AppFT (Jul 1 2008)
Patents
BACKGROUND OF THE INVENTION1. Field of the Invention (Technical Field)The present invention relates to the field of full phase interferometry wherein the phase of the interferogram is recovered from only intensity measurements. Applications of the invention include phase-shifting interferometry, Fourier domainoptical coherence tomography, and Fourier domain optical coherence reflec
Reports from Harvard University, Cardiology Division highlight recent research in life sciences
newsrx.com (Jun 30 2008)
Cardiology
Current study results from the report, 'Association of statin therapy with reduced coronary plaque rupture: an optical coherence tomography study,' have been published. According to recent research from the United States, "Statin therapy induces plaque regression and may stabilize atheromatous plaques. Optical coherence tomography (OCT) is a high-resolution in-vivo imaging modality that allows characterization of atherosclerotic plaques." "We aimed to demonstrate the potential utility of OCT in evaluating coronary plaques ...
Data on thrombosis described by researchers at Medical College
newsrx.com (Jun 30 2008)
Cardiology
According to a study from Harbin, People's Republic of China, "Plaque rupture with subsequent thrombosis is recognised as the underlying pathophysiology of most acute coronary syndromes. Thus, direct thrombus visualisation in vivo may be beneficial for both diagnosis and guidance of therapy." "We sought to test the feasibility of imaging acute thrombosis in vivo using optical coherence tomography (OCT) in an experimental thrombosis animal model. Nine male New Zealand White ...
Broadband ASE Source at 1-micronoptics.org (Jun 30 2008)
The 1-micron broadband source is based on ASE from diode pumped Yb-doped fiber. The 1-micron broadband source uses a proprietary Multiwave Photonics design that allows customization of product characteristics to meet specific requirements imposed by the Customer's application. Product characteristics such as: output power, central wavelength, spectral profile flattening and others, may be customized for particular requirements. This source has been used in applications such Optical Coherence Tomography (OCT), and ...
Non-invasive Pearl Assessment Device (Moptim OSG-1000 System)
YouTube (Jun 29 2008)
Microscopy,
Non-Medical
Video of Moptim OSG-1000 System imaging Gems.
Internal Scanning in Real-time : (Santec OCT-System)
YouTube (Jun 29 2008)
Microscopy
Short video by showing Santec OCT-System.
Myopic foveoschisis: Vitrectomy beneficial before macular hole development
Ophthalmology Times (Jun 28 2008)
Ophthalmology
Detecting a macular hole or photoreceptor detachment is critical for obtaining good surgical results in patients with myopic foveoschisis. Patients with the foveal detachment type seem to benefit the most from vitrectomy. Spectral-domain optical coherence tomography (SD-OCT) and fundus autofluorescence (FAF) are valuable for managing these patients, said Yasushi Ikuno, MD, Osaka University Medical School, Osaka, Japan.
Partial polarization of light induced by random defects at surfaces or bulks
opticsinfobase.org (Jun 27 2008)
Claude Amra, Myriam Zerrad, Laure Siozade, Gaelle Georges, Carole DeumiéPartial polarization may be the result of a scattering process from a fully polarized incident beam. It is shown how the “loss of polarization” is connected with the nature of scatterers (surface roughness, bulk heterogeneity) and on the receiver solid angle. These effects are ... [Opt. Express 16, 10372-10383 (2008)]
£10M Investment Boosts Laser Research
optics.org (Jun 27 2008)
Hybrid and quantum-dot based sources could find application in new areas thanks to two European projects that have recently been granted over £10m. This month saw the launch of two projects that have been granted over £10m in total to develop a new generation of hybrid lasers as well as ultrafast quantum-dot (QD) based sources. Both projects will target compact and versatile lasers for applications ranging from biophotonics to communications ...
Optometric referrals to retina specialists: evaluation and triage via teleophthalmology.
NCBI HomePage (Jun 27 2008)
Ophthalmology
Optometric referrals to retina specialists: evaluation and triage via teleophthalmology. Telemed J E Health. 2008 Jun;14(5):441-5 Authors: Hanson C, Tennant MT, Rudnisky CJ A retrospective noncomparative consecutive case series was conducted to evaluate the clinical outcomes of a novel teleophthalmology program linking optometrists to retina specialists in Alberta, Canada. One hundred seventy-one patients, referred by optometrists via teleophthalmology to a group retina practice between June 2004 and May 2006 underwent ...
Imaging Depth-Resolved Tissue Birefringence With a Single Detector
Scitation (Jun 26 2008)
We report a novel frequency multiplexed optical coherence tomography (FM-OCT) system that is capable of measuring depth-resolved tissue birefringence from a single record of a single detector. The FM-OCT system utilizes polarization-maintaining-fiber based components. The orthogonal channels of the polarization-maintaining-fiber and the cross-terms are frequency multiplexed. After recording the interference signal, a set of digital band-pass filters extract the polarization information. A rapid scanning optical delay line in the reference ...
Early Coverage and Vessel Wall Response of the Zotarolimus Drug-Eluting Stent Implanted in AMI Assessed by Optical Coherence Tomography (OCTAMI)
Home - ClinicalTrials.gov (Jun 26 2008)
Cardiology
The objective of this study is to evaluate the completeness of struts coverage and vessel wall response (strut malapposition, neointima disomogeneities in texture) to the ENDEAVOR drug-eluting stent vs the DRIVER stent (bare metal stent of identical metallic platform) implanted for the treatment of the culprit lesion in ST-elevation acute myocardial infarction (STEMI). To investigate the completeness of the coverage as well as the number of uncovered stent struts per ...
Comparison of the Optical Coherence Tomographic Features of Choroidal Neovascular Membranes in Pathologic Myopia versus Age-Related Macular Degeneration, using Quantitative Subanalysis
BJO Online (Jun 26 2008)
Ophthalmology
Aim: To compare the retinal morphologic characteristics of eyes with choroidal neovascularization (CNV) secondary to pathologic myopia versus eyes with CNV secondary to age-related macular degeneration (AMD), using quantitative optical coherence tomography (OCT) subanalysis. Methods: Twenty-one eyes of 21 patients newly diagnosed with CNV secondary to pathologic myopia, and 43 consecutive cases of eyes with newly diagnosed subfoveal CNV secondary to AMD were retrospectively collected. In all patients, StratusOCT images ...