Search Results - "Gorczynska, Iwona"

Efficient reduction of speckle noise in Optical Coherence Tomography by Szkulmowski, Maciej, Gorczynska, Iwona, Szlag, Daniel, Sylwestrzak, Marcin, Kowalczyk, Andrzej, Wojtkowski, Maciej

“…Speckle pattern, which is inherent in coherence imaging, influences significantly axial and transversal resolution of Optical Coherence Tomography (OCT)…”
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Ultrahigh speed spectral / Fourier domain OCT ophthalmic imaging at 70,000 to 312,500 axial scans per second by Potsaid, Benjamin, Gorczynska, Iwona, Srinivasan, Vivek J, Chen, Yueli, Jiang, James, Cable, Alex, Fujimoto, James G

“…We demonstrate ultrahigh speed spectral / Fourier domain optical coherence tomography (OCT) using an ultrahigh speed CMOS line scan camera at rates of 70,000 -…”
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Comparison of amplitude-decorrelation, speckle-variance and phase-variance OCT angiography methods for imaging the human retina and choroid by Gorczynska, Iwona, Migacz, Justin V, Zawadzki, Robert J, Capps, Arlie G, Werner, John S

“…We compared the performance of three OCT angiography (OCTA) methods: speckle variance, amplitude decorrelation and phase variance for imaging of the human…”
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In vivo identification of the retinal layer containing photopigments in OCT images through correlation with two-photon psychophysics by Bartuzel, Maciej M., Consejo, Alejandra, Stremplewski, Patrycjusz, Sylwestrzak, Marcin, Szkulmowski, Maciej, Gorczynska, Iwona

“…Two-photon vision enables near-infrared light perception in humans. We investigate the possibility to utilize this phenomenon as an indicator of the location…”
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Megahertz-rate optical coherence tomography angiography improves the contrast of the choriocapillaris and choroid in human retinal imaging by Migacz, Justin V, Gorczynska, Iwona, Azimipour, Mehdi, Jonnal, Ravi, Zawadzki, Robert J, Werner, John S

“…Angiographic imaging of the human eye with optical coherence tomography (OCT) is becoming an increasingly important tool in the scientific investigation and…”
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Intraframe motion correction for raster-scanned adaptive optics images using strip-based cross-correlation lag biases by Azimipour, Mehdi, Zawadzki, Robert J, Gorczynska, Iwona, Migacz, Justin, Werner, John S, Jonnal, Ravi S

“…In retinal raster imaging modalities, fixational eye movements manifest as image warp, where the relative positions of the beam and retina change during the…”
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Ultrahigh-Speed Optical Coherence Tomography for Three-Dimensional and En Face Imaging of the Retina and Optic Nerve Head by Srinivasan, Vivek J, Adler, Desmond C, Chen, Yueli, Gorczynska, Iwona, Huber, Robert, Duker, Jay S, Schuman, Joel S, Fujimoto, James G

“…To demonstrate ultrahigh-speed optical coherence tomography (OCT) imaging of the retina and optic nerve head at 249,000 axial scans per second and a wavelength…”
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Scanning protocols dedicated to smart velocity ranging in spectral OCT by Grulkowski, Ireneusz, Gorczynska, Iwona, Szkulmowski, Maciej, Szlag, Daniel, Szkulmowska, Anna, Leitgeb, Rainer A, Kowalczyk, Andrzej, Wojtkowski, Maciej

“…We introduce a new type of scanning protocols, called segmented protocols, which enable extracting multi-range flow velocity information from a single Spectral…”
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Comparison of spectral/Fourier domain optical coherence tomography instruments for assessment of normal macular thickness by Sull, Alan C, Vuong, Laurel N, Price, Lori Lyn, Srinivasan, Vivek J, Gorczynska, Iwona, Fujimoto, James G, Schuman, Joel S, Duker, Jay S

“…The purpose of this study was to report normal macular thickness measurements and assess reproducibility of retinal thickness measurements acquired by a…”
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Four-dimensional structural and Doppler optical coherence tomography imaging on graphics processing units by Sylwestrzak, Marcin, Szlag, Daniel, Szkulmowski, Maciej, Gorczynska, Iwona, Bukowska, Danuta, Wojtkowski, Maciej, Targowski, Piotr

“…The authors present the application of graphics processing unit (GPU) programming for real-time three-dimensional (3-D) Fourier domain optical coherence…”
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Microvascular oxygen tension and flow measurements in rodent cerebral cortex during baseline conditions and functional activation by Yaseen, Mohammad A, Srinivasan, Vivek J, Sakadžić, Sava, Radhakrishnan, Harsha, Gorczynska, Iwona, Wu, Weicheng, Fujimoto, James G, Boas, David A

“…Measuring cerebral oxygen delivery and metabolism microscopically is important for interpreting macroscopic functional magnetic resonance imaging (fMRI) data…”
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High-speed Ultrahigh Resolution Optical Coherence Tomography before and after Ranibizumab for Age-related Macular Degeneration by Witkin, Andre J., MD, Vuong, Laurel N., BS, Srinivasan, Vivek J., PhD, Gorczynska, Iwona, PhD, Reichel, Elias, MD, Baumal, Caroline R., MD, Rogers, Adam H., MD, Schuman, Joel S., MD, Fujimoto, James G., PhD, Duker, Jay S., MD

“…Objective To evaluate intraretinal anatomy in patients with exudative age-related macular degeneration (AMD) using high-speed ultrahigh resolution optical…”
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Multimodal optical imaging system for in vivo investigation of cerebral oxygen delivery and energy metabolism by Yaseen, Mohammad A., Srinivasan, Vivek J., Gorczynska, Iwona, Fujimoto, James G., Boas, David A., Sakadžić, Sava

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Ophthalmic imaging by spectral optical coherence tomography by Wojtkowski, MacIej, Bajraszewski, Tomasz, Gorczyńska, Iwona, Targowski, Piotr, Kowalczyk, Andrzej, Wasilewski, Wojciech, Radzewicz, Czesław

“…To demonstrate two novel ophthalmic imaging techniques based on fast Spectral Optical Coherence Tomography (SOCT). Prospective observation case report. Setting…”
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Computationally effective 2D and 3D fast phase unwrapping algorithms and their applications to Doppler optical coherence tomography by Pijewska, Ewelina, Gorczynska, Iwona, Szkulmowski, Maciej

“…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…”
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Anterior segment imaging with Spectral OCT system using a high-speed CMOS camera by Grulkowski, Ireneusz, Gora, Michalina, Szkulmowski, Maciej, Gorczynska, Iwona, Szlag, Daniel, Marcos, Susana, Kowalczyk, Andrzej, Wojtkowski, Maciej

“…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…”
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Double-clad optical fiber as a single-point sensor of imaging quality for scanning laser system by Morawiec, Seweryn, Stremplewski, Patrycjusz, Bartuzel, Maciej M., Dalasiński, Krzysztof, Gorczynska, Iwona, Szkulmowska, Anna, Szkulmowski, Maciej

“…•A single-pixel defocus sensor for scanning beam imaging systems is developed.•The sensor output is independent of illumination fluctuations and sample…”
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The Properties of Outer Retinal Band Three Investigated With Adaptive-Optics Optical Coherence Tomography by Jonnal, Ravi S, Gorczynska, Iwona, Migacz, Justin V, Azimipour, Mehdi, Zawadzki, Robert J, Werner, John S

“…Optical coherence tomography's (OCT) third outer retinal band has been attributed to the zone of interdigitation between RPE cells and cone outer segments. The…”
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Heinrich Müller (1820-1864) and the entoptic discovery of the site in the retina where vision is initiated by Werner, John S., Gorczynska, Iwona, Spillmann, Lothar

“…Heinrich Müller was a nineteenth-century German retinal anatomist who, during his short career, was one of the discoverers of the rod photopigment rhodopsin…”
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Quantitative cerebral blood flow with optical coherence tomography by Srinivasan, Vivek J, Sakadzić, Sava, Gorczynska, Iwona, Ruvinskaya, Svetlana, Wu, Weicheng, Fujimoto, James G, Boas, David A

“…Absolute measurements of cerebral blood flow (CBF) are an important endpoint in studies of cerebral pathophysiology. Currently no accepted method exists for in…”
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