1. Nicolaus Copernicus University

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    1. Mentioned In 183 Articles

    2. Three-dimensional quantitative imaging
of retinal and choroidal blood flow velocity using joint Spectral and Time domain Optical Coherence Tomography

      Three-dimensional quantitative imaging
of retinal and choroidal blood flow velocity using joint Spectral and Time domain Optical Coherence Tomography
      Recently, joint Spectral and Time domain Optical Coherence Tomography (joint STdOCT) has been proposed to measure ocular blood flow velocity. Limitations of CCD technology allowed only for two-dimensional imaging at that time. In this paper we demonstrate fast three-dimensional STdOCT based on ultrahigh speed CMOS camera. Proposed method is straightforward, fully automatic and does not require any advanced image processing techniques. Three-dimensional distributions of axial velocity components of the blood ...
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    3. Projection OCT fundus imaging for visualising outer retinal pathology in non-exudative age-related macular degeneration

      ...gland Eye Center, Tufts Medical Center, Tufts University, Boston, Massachusetts, USA ^3 Institute of Physics, Nicolaus Copernicus University, Torun, Poland ^4 UPMC Eye Center, Department of Ophthalmology, University of P...
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    4. A study of macular hole formation by serial spectral optical coherence tomography

      Background: The purpose of this paper is to evaluate changes of the vitreoretinal interface in fellow eyes of eyes with a macular hole and to study early stages of macular hole formation by spectral optical coherence tomography (SOCT).Methods: A prospective study of 131 consecutive patients with history of macular hole. Serial SOCT examinations were performed on the fellow eyes four times during a 6-month observation period. Progression of foveal ...
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    5. Anterior segment imaging with Spectral OCT system using a high-speed CMOS camera

      Anterior segment imaging with Spectral OCT system using a high-speed CMOS camera
      We describe a new ultrahigh speed Spectral OCT instrument making use of a CMOS camera and demonstrate high quality in vivo imaging of the anterior segment of the human eye. The high flexibility of the designed imaging system allows a wide range of imaging protocols. Two- and three-dimensional high ... [Opt. Express 17, 4842-4858 (2009)]
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    6. Comparison of reflectivity maps and outer retinal topography in retinal disease by 3-D Fourier domain optical coherence tomography

      Comparison of reflectivity maps and outer retinal topography in retinal disease by 3-D Fourier domain optical coherence tomography
      We demonstrate and compare two image processing methods for visualization and analysis of three-dimensional optical coherence tomography (OCT) data acquired in eyes with different retinal pathologies. A method of retinal layer segmentation based on a multiple intensity thresholding algorithm was ... [Opt. Express 17, 4189-4207 (2009)]
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    7. Simultaneous complex ambiguity removal and quantitative flow velocity estimation with joint spectral and time domain OCT

      , , et al. We show that recently developed joint Spectral and Time Optical Coherence Tomography data analysis scheme combined with oscillatory change of optical path difference allows for simultaneous complex ambiguity removal and quantitative flow velocity estimation. Full range structural tomograms as well a ... [Proc. SPIE 7168, 71681K (2009)] published Thu Feb 19, 2009.
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    8. Segmentation of flowing particles using joint spectral and time domain optical coherence tomography

      We propose a modified method of acquisition and analysis of Spectral Optical Coherence Tomography (SOCT) data to provide information about flow velocities in three dimensions. Joint Spectral and Time domain Optical Coherence Tomography (joint STdOCT) enables flow velocity assessment and segmentation ... [Proc. SPIE 7168, 71680C (2009)] published Thu Feb 19, 2009.
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    9. Three-dimensional retinal blood flow analysis using joint spectral and time domain optical coherence tomography

      In this submission we demonstrate a new application of the joint Spectral and Time domain Optical Coherence Tomography (STdOCT) technique for segmenting and measuring the retinal blood flow velocity in three dimensions. The method is based on direct detection of Doppler shift that arises in time dur ... [Proc. SPIE 7163, 71630Q (2009)] published Wed Feb 18, 2009.
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    10. Swept source OCT imaging of human anterior segment at 200 kHz

      Karol Karnowski, Michalina Gora, Bartlomiej Kaluzny et al. We present applicability of the high speed swept-source optical coherence tomography for in vivo imaging of the anterior segment of the human eye. Three dimensional imaging of the cornea with reduced motion artifacts is possible by using swept source with Fourier domain mode locking operating at 200 ... [Proc. SPIE 7163, 716308 (2009)] published Wed Feb 18, 2009.
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    11. Feature Of The Week 1/25/09: Fourier Domain a Hugh Boost to Optical Coherence Tomography for Cardiovascular Applications

      Feature Of The Week 1/25/09: Fourier Domain a Hugh Boost to Optical Coherence Tomography for Cardiovascular Applications
      ...ed to overcome scattering due to blood. This image is from a recent publication by Adam Sukiennik, et al from Nicolaus Copernicus University and shows a comparison of intravascular ultrasound (IVUS) and OCT (see Article)...
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    12. Optical Coherence Tomography for non-destructive investigations of structure of easel paintings

      In this contribution the application of Optical Coherence Tomography (OCT) for non-invasive structural imaging of easel paintings will be presented. Since the technique permits imaging semi-transparent layers accessible for infrared light, the varnish and glaze layers are usually under investigation ... [Proc. SPIE 7139, 713916 (2008)] published Tue Dec 30, 2008.
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    13. Usefulness of optical coherence tomography in the assessment of atherosclerotic culprit lesions in acute coronary syndromes. Comparison with intravascular ultrasound and virtual histology

      In this paper, we present a case of a female patient with clinically unstable angina pectoris and a bordeline stenosis in the proximal segment of the left anterior descending coronary artery as assessed by coronary angiography and intravascular ultrasound. Virtual histology revealed morphological criteria of a vulnerable plaque forming the culprit lesion. Optical coherence tomography visualized both fibrous cap fracture and a significant stenosis of a coronary artery caused by ...
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    14. 151-165 of 183 « 1 2 ... 8 9 10 11 12 13 »
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  2. About Nicolaus Copernicus University

    Nicolaus Copernicus University

    Nicolaus Copernicus University (NCU) founded in Torun in 1945 is one of the biggest academic institutions in Poland with the total number of 14 divisions, 54 faculties and 40.000 students. The Medical Physics Group is part of the Institute of Physics of the Nicolaus Copernicus University.  Department of Biophysics and Medical Physics at the Nicolaus Copernicus University.  The department members use both experimental (optics and optical spectroscopy) and theoretical (quantum chemistry and molecular dynamics) methods to investigate the structure and dynamic of biologically relevant molecules and tissues.  Nicolaus Copernicus University Collegium Medicum is the Medical College of NCU.