1. University of Vienna

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    1. Mentioned In 26 Articles

    2. The inverse scattering problem for orthotropic media in polarization-sensitive optical coherence tomography

      The inverse scattering problem for orthotropic media in polarization-sensitive optical coherence tomography
      In this paper we provide for a first time, to our knowledge, a mathematical model for imaging an anisotropic, orthotropic medium with polarization-sensitive optical coherence tomography. The imaging problem is formulated as an inverse scattering problem in three dimensions for reconstructing the electrical susceptibility of the medium using Maxwells equations. Our reconstruction method is based on the second-order Born-approximation of the electric field
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    3. PhD Student Opening in Functional Optical Imaging Employing Contrast Agents at the Medical University of Vienna

      PhD Student Opening in Functional Optical Imaging Employing Contrast Agents at the Medical University of Vienna
      ...cking. The position is guaranteed of funding for 3 years. The student will work for two years at the Medical University of Vienna and one year at the Nanyang Technological University in Singapore. A Master’s degree in v...
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    4. Ultra-low noise supercontinuum source for ultra-high resolution optical coherence tomography at 1300 nm

      Ultra-low noise supercontinuum source for ultra-high resolution optical coherence tomography at 1300 nm
      Supercontinuum (SC) sources are of great interest for many applications due to their ultra-broad optical bandwidth, good beam quality and high power spectral density [1]. In particular, the high average power over large bandwidths makes SC light sources excellent candidates for ultra-high resolution optical coherence tomography (UHR-OCT) [2-5]. However, conventional SC sources suffer from high pulse-to-pulse intensity fluctuations as a result of the noise-sensitive nonlinear effects involved in the SC ...
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    5. Quantitative reconstructions in multi-modal photoacoustic and optical coherence tomography imaging

      Quantitative reconstructions in multi-modal photoacoustic and optical coherence tomography imaging
      In this paper we perform quantitative reconstruction of the electric susceptibility and the Grneisen parameter of a non-magnetic linear dielectric medium using measurement of a multi-modal photoacoustic and optical coherence tomography system. We consider the mathematical model presented in Elbauet al(2015Handbook of Mathematical Methods in Imaginged O Scherzer (New York: Springer) pp 1169204), where a Fredholm integral equation of the first kind for the Grneisen parameter was derived. For ...
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    6. Quantitative reconstructions in multi-modal photoacoustic and optical coherence tomography imaging

      Quantitative reconstructions in multi-modal photoacoustic and optical coherence tomography imaging
      In this paper we perform quantitative reconstruction of the electric susceptibility and the Gruneisen parameter of a non-magnetic linear dielectric medium using measurement of a multi-modal photoacoustic and optical coherence tomography system. We consider the mathematical model presented in [11], where a Fredholm integral equation of the first kind for the Gruneisen parameter was derived. For the numerical solution of the integral equation we consider a Galerkin type method.
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    7. The inverse scattering problem for orthotropic media in Polarization-sensitive Optical Coherence Tomography

      The inverse scattering problem for orthotropic media in Polarization-sensitive Optical Coherence Tomography
      In this paper we provide a mathematical model for imaging an anisotropic, orthotropic medium with Polarization-Sensitive Optical Coherence Tomography (PS-OCT). The imaging problem is formulated as an inverse scattering problem in three dimensions for reconstructing the electrical susceptibility of the medium using Maxwells equations. Our reconstruction method is based on the second-order Born-approximation of the electric field.
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    8. Enhanced Diagnostic Capability for Glaucoma of 3-Dimensional Versus 2-Dimensional Neuroretinal Rim Parameters Using Spectral Domain Optical Coherence Tomography

      Enhanced Diagnostic Capability for Glaucoma of 3-Dimensional Versus 2-Dimensional Neuroretinal Rim Parameters Using Spectral Domain Optical Coherence Tomography
      Purpose: To compare the diagnostic capability of 3-dimensional (3D) neuroretinal rim parameters with existing 2-dimensional (2D) neuroretinal and retinal nerve fiber layer (RNFL) thickness rim parameters using spectral domain optical coherence tomography (SD-OCT) volume scans. Materials and Methods: Design: Institutional prospective pilot study. Study population: 65 subjects (35 open-angle glaucoma patients, 30 normal patients). Observation procedures: One eye of each subject was included. SD-OCT was used to obtain 2D RNFL ...
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    9. A signal separation technique for sub-cellular imaging using dynamic optical coherence tomography

      A signal separation technique for sub-cellular imaging using dynamic optical coherence tomography
      This paper aims at imaging the dynamics of metabolic activity of cells. Using dynamic optical coherence tomography, we introduce a new multiparticle dynamical model to simulate the movements of the collagen and the cell metabolic activity and develop an efficient signal separation technique for sub-cellular imaging. We perform a singular-value decomposition of the dynamic optical images to isolate the intensity of the metabolic activity. We prove that the largest eigenvalue ...
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    10. Inverse Problems of Combined Photoacoustic and Optical Coherence Tomography

      Inverse Problems of Combined Photoacoustic and Optical Coherence Tomography
      Optical coherence tomography (OCT) and photoacoustic tomography (PAT) are emerging non-invasive biological and medical imaging techniques. It is a recent trend in experimental science to design experiments that perform PAT and OCT imaging at once. In this paper we present a mathematical model describing the dual experiment. Since OCT is mathematically modelled by Maxwell's equations or some simplifications of it, whereas the light propagation in quantitative photoacoustics is modelled ...
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    11. Mathematical Methods of Optical Coherence Tomography (Book Chapter)

      Mathematical Methods of Optical Coherence Tomography (Book Chapter)
      In this chapter a general mathematical model of Optical Coherence Tomography (OCT) is presented on the basis of the electromagnetic theory. OCT produces high-resolution images of the inner structure of biological tissues. Images are obtained by measuring the time delay and the intensity of the backscattered light from the sample considering also the coherence properties of light. The scattering problem is considered for a weakly scattering medium located far enough ...
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    12. Dispersion-cancelled biological imaging with quantum-inspired interferometry

      Dispersion-cancelled biological imaging with quantum-inspired interferometry
      Quantum information science promises transformative impact over a range of key technologies in computing, communication, and sensing. A prominent example uses entangled photons to overcome the resolution-degrading effects of dispersion in the medical-imaging technology, optical coherence tomography. The quantum solution introduces new challenges: inherently low signal and artifacts, additional unwanted signal features. It has recently been shown that entanglement is not a requirement for automatic dispersion cancellation. Such classical techniques ...
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    13. 1-15 of 26 1 2 »
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  2. About University of Vienna

    University of Vienna

    University of Vienna was founded in 1365 and is the oldest university in the German-speaking world and one of the largest in Central Europe. At present, about 72,000 students are enrolled at the University of Vienna, in more than 170 courses. The University of Vienna is also the largest teaching and research institution in Austria with close to 8,300 employees, 6,200 of which are scientists and academics.