1. University of Washington

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    1. Mentioned In 335 Articles

    2. Variable-range Doppler optical microangiography using stabilized step scanning and phase variance binarized mask

      Variable-range Doppler optical microangiography using stabilized step scanning and phase variance binarized mask
      Skipping various numbers of A-lines is effective to obtain multi-range velocimetry using Doppler optical coherence tomography (DOCT). High correlation between A-lines is a fundamental prerequisite for DOCT processing. Therefore, high oversampling is normally necessary, especially when skipping A-lines. That requires quite a long time of imaging, which might not be acceptable on some occasions. Step-scanning protocol, which captures repeated A-scans, has been employed for multi-range DOCT previously. We develop it ...
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    3. Catheterscope 3D guidance and interface system

      Catheterscope 3D guidance and interface system
      Visual-assisted guidance of an ultra-thin flexible endoscope to a predetermined region of interest within a lung during a bronchoscopy procedure. The region may be an opacity-identified by non-invasive imaging methods, such as high-resolution computed tomography (HRCT) or as a malignant lung mass that was diagnosed in a previous examination. An embedded position sensor on the flexible endoscope indicates the position of the distal tip of the probe in a Cartesian ...
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    4. Methods And Systems For Integrated Imaging Using Optical Coherence Tomography And Photoacoustic Imaging

      Methods And Systems For Integrated Imaging Using Optical Coherence Tomography And Photoacoustic Imaging
      Systems and methods for photoacoustic imaging are provided. Photoacoustic signals are excited from a body and the excited photoacoustic signals are detected with a low coherence interferometer system serving as a photoacoustic detector. Cross-sectional images of the body are then reconstructed by the system from the detected photoacoustic signals.
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    5. High-resolution 1050 nm spectral domain retinal optical coherence tomography at 120 kHz A-scan rate with 6.1 mm imaging depth

      High-resolution 1050 nm spectral domain retinal optical coherence tomography at 120 kHz A-scan rate with 6.1 mm imaging depth
      We report a newly developed high speed 1050nm spectral domain optical coherence tomography (SD-OCT) system for imaging posterior segment of human eye. The system is capable of an axial resolution at ~10 m in air, an imaging depth of 6.1 mm in air, a system sensitivity fall-off at ~6 dB/3mm and an imaging speed of 120,000 A-scans per second. We experimentally demonstrate the systems capability to perform ...
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    6. Extended imaging depth to 12 mm for 1050-nm spectral domain optical coherence tomography for imaging the whole anterior segment of the human eye at 120-kHz A-scan rate

      Extended imaging depth to 12 mm for 1050-nm spectral domain optical coherence tomography for imaging the whole anterior segment of the human eye at 120-kHz A-scan rate
      We demonstrate a 1050-nm spectral domain optical coherence tomography (OCT) system with a 12mm imaging depth in air, a 120kHz A-scan rate and a 10m axial resolution for anterior-segment imaging of human eye, in which a new prototype InGaAs linescan camera with 2048 active-pixel photodiodes is employed to record OCT spectral interferograms in parallel. Combined with the full-range complex technique, we show that the system delivers comparable imaging performance to ...
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    7. Optical coherence tomography provides an ability to assess mechanical property of cardiac wall of developing outflow tract in embryonic heart in vivo

      Optical coherence tomography provides an ability to assess mechanical property of cardiac wall of developing outflow tract in embryonic heart in vivo
      Knowledge of the biomechanical/elastic property of the cardiac wall is of fundamental importance in improving our understanding of cardiac development, particularly the interaction between the wall dynamics and hemodynamics in the developing outflow tract (OFT). We describe a method that employs optical coherence tomography (OCT) as a means to noninvasively measure the local elastic property of the cardiac wall in vivo . The method uses a time-lapse sequence of OCT ...
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    8. Optical microangiography provides correlation between microstructure and microvasculature of optic nerve head in human subjects

      Optical microangiography provides correlation between microstructure and microvasculature of optic nerve head in human subjects
      It is demonstrated that optical microangiography (OMAG) is capable of imaging the detailed microstructure and microvasculature of the in vivo human optic nerve head (ONH), including the prelaminar tissue, the lamina cribrosa, the scleral rim and the vessels in the region of the circle of Zin-Haller. For demonstration, an ultrahigh sensitive OMAG system operating in the 850 nm wavelength region and a 500 kHz A-scan rate resulting in a spatial ...
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    9. Digital focusing of OCT images based on scalar diffraction theory and information entropy

      Digital focusing of OCT images based on scalar diffraction theory and information entropy
      This paper describes a digital method that is capable of automatically focusing optical coherence tomography (OCT) en face images without prior knowledge of the point spread function of the imaging system. The method utilizes a scalar diffraction model to simulate wave propagation from out-of-focus scatter to the focal plane, from which the propagation distance between the out-of-focus plane and the focal plane is determined automatically via an image-definition-evaluation criterion based ...
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    10. Label-free imaging of blood vessel morphology with capillary resolution using optical microangiography

      Label-free imaging of blood vessel morphology with capillary resolution using optical microangiography
      Several tissue pathologies are correlated with changes in the blood vessel morphology and microcirculation that supplies the tissue. Optical coherence tomography (OCT) is an imaging technique that enables acquiring non-invasive three-dimensional images of biological structures with micrometer resolution. Optical microangiography (OMAG) is a method of processing OCT data which enables visualizing the three-dimensional blood vessel morphology within biological tissues. OMAG has high spatial resolution which allows visualizing single capillary vessels ...
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    11. Extracting cardiac shapes and motion of the chick embryo heart outflow tract from four-dimensional optical coherence tomography images

      Extracting cardiac shapes and motion of the chick embryo heart outflow tract from four-dimensional optical coherence tomography images
      ...analysis of cardiac motion. Oregon Health & Science University, Heart Research Center, Portland, Oregon 97239 University of Washington, Department of Bioengineering, Seattle, Washington 98195 Abstract.  Recent advances ...
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    12. In vivo functional imaging of blood flow and wall strain rate in outflow tract of embryonic chick heart using ultrafast spectral domain optical coherence tomography

      In vivo functional imaging of blood flow and wall strain rate in outflow tract of embryonic chick heart using ultrafast spectral domain optical coherence tomography
      ...blood flow provides a useful approach to better understand cardiac dynamics during early developmental stages University of Washington, Department of Bioengineering, Seattle, Washington 98195 Oregon Health & Science Univ...
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    13. Impact of intraocular pressure on changes of blood flow in the retina, choroid, and optic nerve head in rats investigated by optical microangiography

      Impact of intraocular pressure on changes of blood flow in the retina, choroid, and optic nerve head in rats investigated by optical microangiography
      In this paper, we demonstrate the use of optical coherence tomography/optical microangiography (OCT/OMAG) to image and measure the effects of acute intraocular pressure (IOP) elevation on retinal, choroidal and optic nerve head (ONH) perfusion in the rat eye. In the experiments, IOP was elevated from 10 to 100 mmHg in 10 mmHg increments. At each IOP level, three-dimensional data volumes were captured using an ultrahigh sensitive (UHS) OMAG ...
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    14. Maturation of the Human Fovea: Correlation of Spectral-Domain Optical Coherence Tomography Findings With Histology

      Maturation of the Human Fovea: Correlation of Spectral-Domain Optical Coherence Tomography Findings With Histology
      ...e University Eye Center, Durham, North Carolina , * Daniel Possin Affiliations + Department of Ophthalmology, University of Washington, Seattle, Washington , * Stephanie J. Chiu Affiliations + Department of Biomedical En...
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    15. Washington University Receives a 2012 NIH Grant for Smart Laser Treatment of Port-Wine Stain in Children

      Washington University Receives a 2012 NIH Grant for Smart Laser Treatment of Port-Wine Stain in Children
      Washington University Receives a 2012 NIH Grant for $84,965 for Smart Laser Treatment of Port-Wine Stain in Children. The program is a multi-year program and started in 2012 and ends in 2014. The principle investigator is Bin Rao. A brief description of the project is given below. Due to the lack of port-wine stain (PWS) lesion information, there is a fundamental gap in achieving the optimum therapeutic outcome of ...
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    16. 241-255 of 335 « 1 2 ... 14 15 16 17 18 19 20 ... 21 22 23 »
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  2. About University of Washington

    University of Washington

    The University of Washington, founded in 1861, is a public research university in Seattle, Washington, United States. It is the largest university in the Northwestern United States and the oldest public university in Washington. The UW maintains three locations, with its flagship campus in Seattle's University District and branch campuses in Tacoma and Bothell. Its operating budget for fiscal year 2005 was $3.1 billion. The university is known as a Public Ivy, an American term for state-funded institutions of higher learning that "provide[s] an Ivy League collegiate experience at a public school price."