1. Articles mentioning both Maciej Szkulmowski and Iwona Gorczynska

    1-15 of 15

    1. Blood flow rate estimation in optic disc capillaries and vessels using Doppler optical coherence tomography with 3D fast phase unwrapping

      Explore OSA | OSA Publishing Ophthalmology
      Blood flow rate estimation in optic disc capillaries and vessels using Doppler optical coherence tomography with 3D fast phase unwrapping
      The retinal volumetric flow rate contains useful information not only for ophthalmo-logy but also for the diagnosis of common civilization diseases such as diabetes, Alzheimer's disease, or cerebrovascular diseases. Non-invasive optical methods for quantitative flow assessment, such as Doppler optical coherence tomography (OCT), have certain limitations. One is the phase wrapping that makes simultaneous calculations of the flow in all human retinal vessels impossible due to a very large ...
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      Mentions: Nicolaus Copernicus University Maciej Szkulmowski Iwona Gorczynska

    2. Computationally effective 2D and 3D fast phase unwrapping algorithms and their applications to Doppler optical coherence tomography

      Explore OSA | OSA Publishing
      Computationally effective 2D and 3D fast phase unwrapping algorithms and their applications to Doppler optical coherence tomography
      We propose a simplification for a robust and easy to implement fast phase unwrapping (FPU) algorithm that is used to solve the phase wrapping problem encountered in various fields of optical imaging and metrology. We show that the number of necessary computations using the algorithm can be reduced compared to its original version. FPU can be easily extended from two to three spatial dimensions. We demonstrate the applicability of the ...
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      Mentions: Nicolaus Copernicus University Maciej Szkulmowski Iwona Gorczynska

    3. Angio-OCT as a noninvasive tool for three-dimensional vascular network visualization in retinal diseases

      Explore Conference Proceedings Ophthalmology
      Angio-OCT as a noninvasive tool for three-dimensional vascular network visualization in retinal diseases
      In this paper we demonstrate applicability of intensity-based optical coherence tomography technique for noninvasive visualization of 3D retinal microcapillary network. The study was performed with ultra high resolution and high speed (180,000 Ascans/sec) spectral optical coherence tomography (SOCT). New scanning protocols and data processing algorithms have been introduced to visualize microcapillary network. Moreover, results obtained in the eyes of healthy volunteers and patients with eye diseases were compared ...
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      Mentions: Maciej Wojtkowski Nicolaus Copernicus University Maciej Szkulmowski

    4. Feature Of The Week 11/25/12: Nicolaus Copernicus University Presents Work on Four-Dimensional OCT Imaging Using Graphics Processing Units

      Explore Optical Coherence Tomography News
      Feature Of The Week 11/25/12: Nicolaus Copernicus University Presents Work on Four-Dimensional OCT Imaging Using Graphics Processing Units
      Nicolaus Copernicus University present the application of graphics processing unit (GPU) programming for real-time three-dimensional (3-D) Fourier domain optical coherence tomography (FdOCT) imaging with implementation of flow visualization algorithms. One of the limitations of FdOCT is data processing time, which is generally longer than data acquisition time. Utilizing additional algorithms, such as Doppler analysis, further increases computation time. The general purpose computing on GPU (GPGPU) has been used successfully for ...
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      Mentions: Maciej Wojtkowski Nicolaus Copernicus University Maciej Szkulmowski

    5. Four-dimensional structural and Doppler optical coherence tomography imaging on graphics processing units

      Explore SPIE | Journal
      Four-dimensional structural and Doppler optical coherence tomography imaging on graphics processing units
      The authors present the application of graphics processing unit (GPU) programming for real-time three-dimensional (3-D) Fourier domain optical coherence tomography (FdOCT) imaging with implementation of flow visualization algorithms. One of the limitations of FdOCT is data processing time, which is generally longer than data acquisition time. Utilizing additional algorithms, such as Doppler analysis, further increases computation time. The general purpose computing on GPU (GPGPU) has been used successfully for structural ...
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      Mentions: Maciej Wojtkowski Nicolaus Copernicus University Maciej Szkulmowski

    6. Optical Coherence Tomography Apparatus And Method With Speckle Suppression

      Explore patentscope.wipo.int Patents
      Optical Coherence Tomography Apparatus And Method With Speckle Suppression
      The invention relates to an optical coherence tomography apparatus and method. It improves speckle suppression by modifying the scanning trajectory (18) of the probing light beam so that groups of A scans close to the imaged segments (22) can be recorded and averaged. The invention facilitates effective speckle suppression combined with high resolution and little dependence of sample motions during the measurement.
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      Mentions: Maciej Wojtkowski Nicolaus Copernicus University Andrzej A. Kowalczyk

    7. Multi-parametric imaging of murine brain using spectral and time domain optical coherence tomography

      Explore Linking to Scitation Content Neurology
      Multi-parametric imaging of murine brain using spectral and time domain optical coherence tomography
      Examination of brain functions in small animal models may help improve the diagnosis and treatment of neurological conditions. Transcranial imaging of small rodents brains poses a major challenge for optical microscopy. Another challenge is to reduce the measurement time. We describe methods and algorithms for three-dimensional assessment of blood flow in the brains of small animals, through the intact skull, using spectral and time domain optical coherence tomography. By introducing ...
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      Mentions: Maciej Wojtkowski Nicolaus Copernicus University Maciej Szkulmowski

    8. Microfluidics analysis of blood using joint spectral and time domain optical coherence tomography

      Explore SPIE Digital Library
      Microfluidics analysis of blood using joint spectral and time domain optical coherence tomography
      Although the Doppler Optical Coherence Tomography techniques have already enabled imaging of blood flow in large vessels in biological tissues, the generation of velocity maps of the capillary network is still a challenge. Since several important physiological and pathological phenomena occur in the microcirculation, the possibility of flow imaging and velocity assessment in microcapillaries may be important for medical diagnostics. Understanding of the origin of the Doppler signal in capillary ...
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      Mentions: Maciej Wojtkowski Nicolaus Copernicus University Andrzej A. Kowalczyk

    9. Angiogram visualization and total velocity blood flow assessment based on intensity information analysis of OCT data

      Explore SPIE Digital Library Ophthalmology
      Angiogram visualization and total velocity blood flow assessment based on intensity information analysis of OCT data
      We propose two independent OCT data processing methods allowing visualization and analysis of the blood flow. These methods utilize variations in the OCT intensity images caused by flowing blood. The first method calculates standard deviation of intensity to generate retinal OCT angiograms. We present algorithm of this method and results of application for visualization of the microvasculature in the macular area of the human eye in vivo. The second method ...
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      Mentions: Maciej Wojtkowski Nicolaus Copernicus University Maciej Szkulmowski

    13. Varnish Thickness Determination by Spectral Optical Coherence Tomography

      Explore SpringerLink Home Art
      The applicability of spectral optical coherence tomography (SOCT) for noninvasive and noncontact assessment of varnish layer thickness and structure on easel paintings is discussed. The SOCT tomograms of such objects are presented. Content Type Book ChapterDOI 10.1007/978-3-540-72130-7_58Authors I. Gorczynska, Opificio delle Pietre Dure di Firenze Laboratorio Scientifico Viale Strozzi 1 50100 Firenze ItalyM. Wojtkowski, Opificio delle Pietre Dure di Firenze Laboratorio Scientifico Viale Strozzi 1 50100 Firenze ItalyM ...
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      Mentions: Maciej Wojtkowski Nicolaus Copernicus University Andrzej A. Kowalczyk

    15. Comparison of reflectivity maps and outer retinal topography in retinal disease by 3-D Fourier domain optical coherence tomography

      Explore opticsinfobase.org Ophthalmology
      Comparison of reflectivity maps and outer retinal topography in retinal disease by 3-D Fourier domain optical coherence tomography
      ...omain optical coherence tomography Maciej Wojtkowski, Bartosz L. Sikorski, Iwona Gorczynska, Michalina Gora, Maciej Szkulmowski, Danuta Bukowska, Jakub Kaluzny, James G. Fujimoto, and Andrzej Kowalczyk Optics Expres...
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      Mentions: Massachusetts Institute of Technology James G. Fujimoto Maciej Wojtkowski
    16. 1-15 of 15
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    1. (15 articles) Nicolaus Copernicus University
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  5. People in the News

    1. (13 articles) Maciej Wojtkowski
    2. (8 articles) Andrzej A. Kowalczyk
    3. (7 articles) Daniel Szlag
    4. (5 articles) Ireneusz Grulkowski
    5. (3 articles) Marcin Sylwestrzak
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