Articles from Michael Pircher

1. Entities in the News

   (18 articles) Christoph K. Hitzenberger

   (18 articles) Michael Pircher

   (16 articles) Medical University of Vienna

   (14 articles) Erich Götzinger

   (8 articles) David Stifter

   (8 articles) Upper Austrian Research GmbH

   (8 articles) Karin Wiesauer

   (3 articles) Ursula Schmidt-Erfurth

   (3 articles) Stephan Michels

   (2 articles) Carl Zeiss Meditec

2. Popular Articles

   Retinal pigment epithelium segmentation by polarization sensitive optical coherence tomography

   Ultrahigh-Resolution Transversal Polarization-Sensitive Optical Coherence Tomography: Structural Analysis and Strain-Mapping

   Bidirectional Doppler Fourier-domain optical coherence tomography for measurement of absolute flow velocities in human retinal vessels

   Advanced Optical Coherence Tomography techniques: novel and fast imaging tools for non-destructive testing

   Simultaneous Slo/oct imaging of the human retina with axial eye motion correction

   Investigation of glass–fibre reinforced polymers by polarisation-sensitive, ultra-high resolution optical coherence tomography: Internal structures, defects and stress

   Spatially Resolved Stress Measurements in Materials with Polarisation-Sensitive Optical Coherence Tomography: Image Acquisition and Processing Aspects

   Spectral-Domain Optical Coherence Tomography: a Novel and Fast Tool for NDT

   High sensitive measurement of the human axial eye length in vivo with Fourier domain low-coherence interferometry

   Simultaneous imaging of human cone mosaic with adaptive optics enhanced scanning laser ophthalmoscopy and high-speed transversal scanning optical coherence tomography

3. Recent Pictures

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1. Spatially Resolved Stress Measurements in Materials with Polarisation-Sensitive Optical Coherence Tomography: Image Acquisition and Processing Aspects

   Explore Article www3.interscience.wiley.com (Dec 21 2008) NDE/NDT

   Abstract: We demonstrate that polarisation-sensitive optical coherence tomography (PS-OCT) is suitable for mapping the stress distribution within materials in a contact-free and non-destructive way. In contrast to transmission photoelasticity measurements, the samples do not have to be transparent but can be of scattering nature. Denoising and analysis of fringe patterns in single PS-OCT retardation images are demonstrated to be the bases for a quantitative whole-field evaluation of the internal stress ... (Read Full Article)
   

   Comment on Article Mentions:   Christoph K. Hitzenberger   Michael Pircher   Medical University of Vienna

2. Bidirectional Doppler Fourier-domain optical coherence tomography for measurement of absolute flow velocities in human retinal vessels

   Explore Article opticsinfobase.org (Dec 5 2008) Ophthalmology

   We describe a bidirectional color Doppler Fourier-domain optical coherence tomography system capable of measuring absolute velocities of moving scatterers by illuminating the sample with two linearly and orthogonally polarized beams, incident at a known angle on the sample. The velocity calculation is independent of the exact orientation of the velocity vector in the detection plane. First measurements were performed on a rotating disk driven at well-defined velocities and tilted by ... (Read Full Article)
   

   Comment on Article Mentions:   Michael Pircher   Erich Götzinger   Rainer A. Leitgeb

3. Analysis of the Origin of Atypical Scanning Laser Polarimetry Patterns by Polarization-Sensitive Optical Coherence Tomography

   Explore Article iovs.org (Nov 25 2008) Ophthalmology

   This study uses polarization-sensitive optical coherence tomography to identify the reasons for atypical scanning laser polarimetry patterns; the predominant source of these artifacts is increased penetration of the probing light into the strongly birefringent sclera. (Read Full Article)
   

   Comment on Article Mentions:   Christoph K. Hitzenberger   Michael Pircher   Medical University of Vienna

4. Advanced Optical Coherence Tomography techniques: novel and fast imaging tools for non-destructive testing

   Explore Article NDT Database & The e (Oct 25 2008) NDE/NDT

   We demonstrate that Optical Coherence Tomography (OCT), a method which was originally developed for depth-resolved imaging of biological tissue, is suited to adequately respond to different problems posed in the field of contactless material characterisation and non-destructive testing and evaluation. In detail, the potential of advanced OCT techniques like ultrahigh-resolution OCT, polarisation-sensitive OCT or spectral-domain OCT is evaluated and exemplified for the imaging and characterisation of different polymer and ceramic ... (Read Full Article)
   

   Comment on Article Mentions:   Christoph K. Hitzenberger   Michael Pircher   Medical University of Vienna

5. Retinal pigment epithelium segmentation by polarization sensitive optical coherence tomography

   Explore Article opticsinfobase.org (Sep 30 2008) Ophthalmology

   Erich Götzinger, Michael Pircher, Wolfgang Geitzenauer, Christian Ahlers, Bernhard Baumann, Stephan Michels, Ursula Schmidt-Erfurth, Christoph K. HitzenbergerWe present a new method for identifying and segmenting the retinal pigment epithelium (RPE) in polarization sensitive optical coherence tomography (PS-OCT) images of the human retina. Contrary to previous, intensity based segmentation algorithms, our method uses an intrinsic tissue property of ... [Opt. Express 16, 16410-16422 (2008)] (Read Full Article)
   

   Comment on Article Mentions:   Michael Pircher   Erich Götzinger   Stephan Michels

6. Segmentation of the retinal pigment epithelium by polarization sensitive optical coherence tomography

   Explore Article SPIE Digital Library (Feb 18 2008) Ophthalmology

   Christoph K. Hitzenberger, Erich Gotzinger, Michael Pircher et al. We report on a new method for segmenting the retinal pigment epithelium (RPE) in polarization sensitive optical coherence tomography (PS-OCT) images of the human retina. Contrary to previous segmentation algorithms that were based on variations of backscattered intensity between individual layers, o ... [Proc. SPIE Int. Soc. Opt. Eng. 6847, 684705 (2008)] published Mon Feb 18, 2008. (Read Full Article)
   

   Comment on Article Mentions:   Michael Pircher   Christoph K. Hitzenberger   Erich Götzinger

7. Improved sensitivity measurement of the human eye length in vivo with Fourier domain optical coherence tomography

   Explore Article SPIE Digital Library (Feb 11 2008) Ophthalmology

   Branislav Grajciar, Michael Pircher, Christoph K. Hitzenberger et al. We present a system for intraocular distance measurement of the human eye in vivo with high sensitivity. The instrument is based on Fourier domain low coherence interferometry (FD-LCI). State-of-the-art FD-LCI systems are capable to image a depth range of only a few mm, because the depth range is de ... [Proc. SPIE Int. Soc. Opt. Eng. 6844, 68440L (2008)] published Mon ... (Read Full Article)
   

   Comment on Article Mentions:   Michael Pircher   Medical University of Vienna   Carl Zeiss Meditec

8. High sensitive measurement of the human axial eye length in vivo with Fourier domain low-coherence interferometry

   Explore Article opticsinfobase.org (Feb 5 2008) Ophthalmology

   Branislav Grajciar, Michael Pircher, Christoph K. Hitzenberger, Oliver Findl, Adolf F. Fercher. In this paper we present a system for intraocular distance measurement of the human eye in vivo with high sensitivity. The instrument is based on Fourier domain low coherence interferometry (FD-LCI). State-of- the-art FD-LCI systems are limited to a depth range of only a few mm, because the ... [Opt. Express 16, 2405-2414 (2008)] (Read Full Article)
   

   Comment on Article Mentions:   Michael Pircher   Adolf F. Fercher   Carl Zeiss Meditec

9. Value of polarisation-sensitive optical coherence tomography in diseases affecting the retinal pigment epithelium

   Explore Article BJO Online (Jan 27 2008) Ophthalmology

   Objectives: To evaluate pathological changes of retinal pigment epithelium (RPE) by polarisation-sensitive optical coherence tomography (PS-OCT). Methods: Forty-four eyes (22 patients) with significant pathologies of the RPE were evaluated using PS-OCT. A transversal scanning time domain OCT system was used for two-dimensional cross-sectional imaging of retinal polarisation properties. Results: The RPE scrambles the polarisation state of backscattered light (ie, acts as a depolarising layer), while the polarisation state of transmitted ... (Read Full Article)
   

   Comment on Article Mentions:   Christoph K. Hitzenberger   Michael Pircher   Medical University of Vienna

10. Ultrahigh-Resolution Transversal Polarization-Sensitive Optical Coherence Tomography: Structural Analysis and Strain-Mapping

    Explore Article SpringerLink Home (Jan 11 2008) NDE/NDT

    Abstract Optical coherence tomography (OCT), originally developed and so far nearly exclusively used for biomedical applications (e.g., [1,2]), is a contact-free, non-destructive technique based on low-coherence interferometry to image structures within translucent and turbid materials. Commonly, cross-sectional reflectivity images with a depth-resolution determined by the coherence length of the near-infrared light source are obtained. When OCT is performed in a polarization sensitive way (PS-OCT), additional information about birefringence within a ... (Read Full Article)
    

    Comment on Article Mentions:   Upper Austrian Research GmbH   Christoph K. Hitzenberger   David Stifter

11. Simultaneous imaging of human cone mosaic with adaptive optics enhanced scanning laser ophthalmoscopy and high-speed transversal scanning optical coherence tomography

    Explore Article opticsinfobase.org (Dec 20 2007) Ophthalmology

    M. Pircher, R. J. Zawadzki, J. W. Evans, J. S. Werner, C. K. Hitzenberger We describe a novel instrument capable of acquiring, simultaneously, adaptive optics enhanced scanning laser ophthalmoscopy and optical coherence tomography (OCT) images of the human cone mosaic in vivo. The OCT system is based on transversal scanning of the sample with a line scan rate of 14 kHz, ... [Opt. Lett. 33, 22-24 (2008)] (Read Full Article)
    

    Comment on Article Mentions:   Christoph K. Hitzenberger   John S. Werner   Robert J. Zawadzki

12. Simultaneous Slo/oct imaging of the human retina with axial eye motion correction

    Explore Article opticsinfobase.org (Dec 4 2007) Ophthalmology

    Michael Pircher, Bernhard Baumann, Erich Götzinger, Harald Sattmann, Christoph K. HitzenbergerIt has been shown that transversal scanning (or en-face) optical coherence tomography (TS-OCT) represents an imaging modality capable to record high isotropic resolution images of the human retina in vivo. However, axial eye motion still remains a challenging problem of this technique. In this ... [Opt. Express 15, 16922-16932 (2007)] (Read Full Article)
    

    Comment on Article Mentions:   Christoph K. Hitzenberger   Michael Pircher   Medical University of Vienna

13. Spectral-Domain Optical Coherence Tomography: a Novel and Fast Tool for NDT

    Explore Article NDT Database & The e (Nov 5 2007) NDE/NDT

    Spectral-domain Optical Coherence Tomography (SD-OCT) is a new, promising variant of OCT, providing superior sensitivity and measurement speed for cross-sectional imaging of turbid materials. OCT, originally developed for applications in the field of biomedical diagnostics, has shown high potential for other non-biomedical investigation tasks, e.g. within the field of non-destructive testing (NDT) and contactless material characterization. However, mostly standard OCT techniques have been used for these applications. Therefore, we demonstrate ... (Read Full Article)
    

    Comment on Article Mentions:   Christoph K. Hitzenberger   Michael Pircher   Medical University of Vienna

14. Investigation of glass–fibre reinforced polymers by polarisation-sensitive, ultra-high resolution optical coherence tomography: Internal structures, defects and stress

    Explore Article ScienceDirect (May 22 2007) NDE/NDT

    In this paper, we report on optical coherence tomography (OCT) for the investigation of glass–fibre reinforced polymer (GFRP) materials. OCT, a contactless and non-destructive imaging technique, provides depth-resolved information on internal structures within semi-transparent materials. In our study, we apply a highly advanced OCT technique: we use a transversal scanning, ultra-high resolution, polarisation-sensitive (UHR-PS)-OCT for the analysis of various GFRP samples. UHR-imaging with resolution in the micron range is shown ... (Read Full Article)
    

    Comment on Article Mentions:   Christoph K. Hitzenberger   Michael Pircher   Medical University of Vienna

15. Optical Coherence Tomography for Examination of Parchment Degradation

    Explore Article Hindawi Publishing Corporation (Nov 22 2006) Art

    A novel application of Optical Coherence Tomography utilizing infrared light of 830 nm central wavelength for non invasive examination of the structure of parchment, some covered with iron gall ink, is presented. It is shown that both the parchment and the ink applied are sufficiently transparent to light of this wavelength. In the study, Spectral OCT (SOCT) as well as Polarisation Sensitive OCT (PS-OCT) techniques were used to obtain cross-sectional ... (Read Full Article)
    

    Comment on Article Mentions:   Christoph K. Hitzenberger   Michael Pircher   Medical University of Vienna

16. Transversal ultrahigh-resolution polarizationsensitive optical coherence tomography for strain mapping in materials

    Explore Article opticsinfobase.org (Jun 26 2006) NDE/NDT

    Optical coherence tomography (OCT) and its extension, polarization-sensitive (PS-)OCT, are techniques for contactless and non-destructive imaging of internal structures. In this work, we apply PS-OCT for material characterization. We use a transversal scanning, ultra-high resolution (UHR-)PS-OCT setup providing cross-sectional as well as in-plane information about the internal microstructure, the birefringence and the orientation of the optical axis within the material. We perform structural analysis and strain-mapping for different samples: we ... (Read Full Article)
    

    Comment on Article Mentions:   Christoph K. Hitzenberger   Michael Pircher   Medical University of Vienna

17. Non-destructive quantification of internal stress in polymer materials by polarisation sensitive optical coherence tomography

    Explore Article ScienceDirect (Apr 7 2005) NDE/NDT

    Polarisation sensitive optical coherence tomography (PS-OCT) is an interferometric technique to determine and map the internal birefringence properties of translucent and turbid samples. Because of its non-destructive character, PS-OCT is an ideal method for material characterisation and testing. When birefringence patterns induced by mechanical strain are analysed, information about the stress within a material can be obtained. In this work, we investigate the stress in polymer samples using PS-OCT. From ... (Read Full Article)
    

    Comment on Article Mentions:   Christoph K. Hitzenberger   Michael Pircher   Medical University of Vienna

18. En-face scanning optical coherence tomography with ultra-high resolution for material investigation

    Explore Article opticsinfobase.org (Feb 7 2005) NDE/NDT , Other Non-Medical

    Optical coherence tomography (OCT) is an emerging technique for cross-sectional imaging, originally developed for biological structures. When OCT is employed for material investigation, high-resolution and short measurement times are required, and for many applications, only transversal (en-face) scans yield substantial information which cannot be obtained from cross-sectional images oriented perpendicularly to the sample surface alone. In this work, we combine transversal with ultra-high resolution OCT: a broadband femto-second laser is ... (Read Full Article)
    

    Comment on Article Mentions:   Christoph K. Hitzenberger   Medical University of Vienna   Upper Austrian Research GmbH

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