1. Michael Pircher

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    1. Mentioned In 79 Articles

    2. Identification of Drusen Characteristics in Age-related Macular Degeneration by Polarization-Sensitive Optical Coherence Tomography

      Identification of Drusen Characteristics in Age-related Macular Degeneration by Polarization-Sensitive Optical Coherence Tomography
      ...h for articles by this author , Maria Platzer x Maria Platzer Search for articles by this author , Michael Pircher x Michael Pircher Search for articles by this author , Christoph K. Hitzenberger x Christoph K....
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    3. Analysis of optimum conditions of depolarization imaging by polarization-sensitive optical coherence tomography in the human retina

      Analysis of optimum conditions of depolarization imaging by polarization-sensitive optical coherence tomography in the human retina
      Measurement and imaging of depolarization by polarization-sensitive optical coherence tomography (PS-OCT) requires averaging of Stokes vector elements within two- or three-dimensional (3-D) evaluation windows to obtain the degree of polarization uniformity (DOPU). By use of a PS-OCT system with an integrated retinal tracker, we analyze optimum conditions for depolarization imaging, data processing, and segmentation of depolarizing tissue in the human retina. The trade-offs between figures of merit like DOPU imaging ...
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    4. Three-beam Doppler optical coherence tomography using a facet prism telescope and MEMS mirror for improved transversal resolution

      Three-beam Doppler optical coherence tomography using a facet prism telescope and MEMS mirror for improved transversal resolution
      An improved three-beam Doppler optical coherence tomography system was developed. It utilizes a custom-made three-facet prism telescope to improve the transversal resolution at the sample. Furthermore, a two-axis gimbal-less MEMS mirror is used to minimize off-pivot beam movement at the pupil of the eye, enabling circular scanning for in vivo retinal measurements. We demonstrate the systems abilities for in vitro circular scanning to measure absolute flow and to reconstruct the ...
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    5. Peripapillary rat sclera investigated in vivo with polarization sensitive optical coherence tomography

      Peripapillary rat sclera investigated in vivo with polarization sensitive optical coherence tomography
      Purpose: To demonstrate polarization sensitive (PS) optical coherence tomography (OCT) for non-invasive, volumetric, and quantitative imaging of the birefringent properties of the peripapillary rat sclera. To compare the findings in PS-OCT images to state-of-the-art histomorphometric analysis of the same tissues. Methods: A high-speed PS-OCT prototype operating at 840 nm was modified for imaging the rat eye. Densely sampled PS-OCT raster scans covering an area of ~1.5 mm 1.5 ...
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    6. Single input state polarization sensitive swept source optical coherence tomography based on an all single mode fiber interferometer

      Single input state polarization sensitive swept source optical coherence tomography based on an all single mode fiber interferometer
      ...Author Affiliations Wolfgang Trasischker,^* Stefan Zotter, Teresa Torzicky, Bernhard Baumann, Richard Haindl, Michael Pircher, and Christoph K. Hitzenberger ^Center for Medical Physics and Biomedical Engineering, Medic...
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    7. RETINAL PIGMENT EPITHELIUM FINDINGS IN PATIENTS WITH ALBINISM USING WIDE-FIELD POLARIZATION-SENSITIVE OPTICAL COHERENCE TOMOGRAPHY

      RETINAL PIGMENT EPITHELIUM FINDINGS IN PATIENTS WITH ALBINISM USING WIDE-FIELD POLARIZATION-SENSITIVE OPTICAL COHERENCE TOMOGRAPHY
      Purpose: To investigate pigmentation characteristics of the retinal pigment epithelium (RPE) in patients with albinism using wide-field polarization-sensitive optical coherence tomography compared with intensity-based spectral domain optical coherence tomography and fundus autofluorescence imaging. Methods: Five patients (10 eyes) with previously genetically diagnosed albinism and 5 healthy control subjects (10 eyes) were imaged by a wide-field polarization-sensitive optical coherence tomography system (scan angle: 40 x 40[degrees] on the retina), sensitive ...
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    8. Detection and Analysis of Hard Exudates by Polarization-Sensitive Optical Coherence Tomography in Patients with Diabetic Maculopathy

      Detection and Analysis of Hard Exudates by Polarization-Sensitive Optical Coherence Tomography in Patients with Diabetic Maculopathy
      Purpose: To image and analyze hard exudates (HE) and their precursors in patients with diabetic macular edema (DME) using polarization sensitive optical coherence tomography (PS-OCT). Methods: Twenty-two eyes of 16 patients with DME were imaged using color fundus photography (CF) and PS-OCT. In PS-OCT, HE were automatically detected based on their distinct polarization-scrambling qualities. CF images were manually graded for the presence of HE by two masked graders and correlated ...
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    9. In vitro and in vivo three-dimensional velocity vector measurement by three-beam spectral-domain Doppler optical coherence tomography

      In vitro and in vivo three-dimensional velocity vector measurement by three-beam spectral-domain Doppler optical coherence tomography
      We developed a three-beam Doppler optical coherence tomography (OCT) system that enables measurement of the velocity vector of moving particles in three-dimensions (3-D). The spatial orientation as well as the magnitude of motion can be determined without prior knowledge of the geometry of motion. The system combines three spectral-domain OCT interferometers whose sample beams are focused at the sample by a common focusing lens at three different angles. This provides ...
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    10. Characterization of Stargardt disease using polarisation-sensitive optical coherence tomography and fundus autofluorescence imaging

      Characterization of Stargardt disease using polarisation-sensitive optical coherence tomography and fundus autofluorescence imaging
      Purpose: To identify disease-specific changes in Stargardt disease (STGD) based on imaging with polarisation-sensitive spectral-domain optical coherence tomography (PS-OCT) and to compare structural changes to those visible on blue light fundus autofluorescence (FAF)imaging. Methods: 28 eyes of 14 patients diagnosed with STGD were imaged using a novel high-speed, large-field PS-OCT system and FAF (Heidelberg Retina Angiograph/Spectralis, Heidelberg Engineering, Germany; excitation 488nm, emission 500nm). The ophthalmoscopic phenotype was classified ...
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    11. Imaging Retinal Pigment Epithelial Proliferation Secondary to PASCAL Photocoagulation In Vivo by Polarization-sensitive Optical Coherence Tomography

      Imaging Retinal Pigment Epithelial Proliferation Secondary to PASCAL Photocoagulation In Vivo by Polarization-sensitive Optical Coherence Tomography
      ...ns + Center for Medical Physics and Biomedical Engineering, Medical University of Vienna, Vienna, Austria , * Michael Pircher Affiliations + Center for Medical Physics and Biomedical Engineering, Medical University of Vi...
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    12. Retinal polarization-sensitive optical coherence tomography at 1060 nm with 350 kHz A-scan rate using an Fourier domain mode locked laser

      Retinal polarization-sensitive optical coherence tomography at 1060 nm with 350 kHz A-scan rate using an Fourier domain mode locked laser
      We present a novel, high-speed, polarization-sensitive, optical coherence tomography set-up for retinal imaging operating at a central wavelength of 1060 nm which was tested for in vivo imaging in healthy human volunteers. We use the system in combination with a Fourier domain mode locked laser with active spectral shaping which enables the use of forward and backward sweep in order to double the imaging speed without a buffering stage. With ...
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    13. Measuring Retinal Nerve Fiber Layer Birefringence, Retardation, and Thickness Using Wide-Field, High-Speed Polarization Sensitive Spectral Domain OCT

      Measuring Retinal Nerve Fiber Layer Birefringence, Retardation, and Thickness Using Wide-Field, High-Speed Polarization Sensitive Spectral Domain OCT
      ... and Thickness Using Wide-Field, High-Speed Polarization Sensitive Spectral Domain OCT 1. Stefan Zotter^1, 2. Michael Pircher^1, 3. Erich Götzinger^1, 4. Teresa Torzicky^1, 5. Hirofumi Yoshida^2, 6. Futoshi Hirose^2, 7. ...
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    14. 1-15 of 79 1 2 3 4 5 6 »
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  2. About Michael Pircher

    Michael Pircher

    Michael Pircher graduated from the Experimental Physics Department of the University of Technology of Graz, Austria in 2000. In 2003 he finished his PhD at the University of Technology of Vienna. From 2003 to 2006 he worked as a Postdoc at the Center for Biomedical Engineering and Physics of the Medical University of Vienna. From 2006 to 2012 he was working as an Assistant Professor at the Center for Medical Physics and Biomedical Engineering of the Medical University of Vienna where he gained his Habilitation in 2008. Currently he is Associate Professor and faculty member of the same department. His scientific interest lies in retinal imaging, adaptive optics, new contrast techniques in optical coherence tomography, coherence microscopy