1. Oregon Health & Science University

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    1. Mentioned In 433 Articles

    2. Simultaneous high-resolution retinal imaging and high-penetration choroidal imaging by one-micrometer adaptive optics optical coherence tomography

      Simultaneous high-resolution retinal imaging and high-penetration choroidal imaging by one-micrometer adaptive optics optical coherence tomography
      Adaptive optics optical coherence tomography (AO-OCT) provides three-dimensional high-isotropic-resolution retinal images in vivo. We developed AO-OCT with a 1.03-μm probing beam and demonstrated high-penetration, high-resolution retinal imaging. Axial scans are acquired with a speed of 47,000 lines/s. AO closed loop is configured with a single deformable mirror. Seven eyes of 7 normal subjects were examined. Signal enhancement was found for all subjects. A rippled interface between nerve ...
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    3. The Year in Stimulus Funding: The impact of the American Recovery and Reinvestment Act on biomedical research

      The Year in Stimulus Funding: The impact of the American Recovery and Reinvestment Act on biomedical research
      ...Act and including a number of “ARRA Stories” (http://recovery.nih.gov/story.php). Among the latter is that of Oregon Health & Science University in Portland. As of Oct. 16, it had attracted $51.5 million in federal stimu...
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    4. Ultra-high speed full range complex spectral domain optical coherence tomography for volumetric imaging at 140,000 A scans per second

      Ultra-high speed full range complex spectral domain optical coherence tomography for volumetric imaging at 140,000 A scans per second
      We demonstrate an ultra-high speed full rang spectral domain optical coherence tomography system based on CMOS camera at 140,000 A-scans per second. By implementing beam-offset method, a constant modulation frequency is introduced into each B-scan that enables the reconstruction of the full range complex SDOCT images from in vivo biological specimens. To make use of the full acquisition capacity of detection camera used in the system, we developed system ...
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    5. Visualizing ocular perfusion with optical microangiography

      Visualizing ocular perfusion with optical microangiography
      Better assessment of ocular blood circulation may provide important diagnostic and treatment information for eye pathologies such as age-related macular degeneration, diabetic retinopathy, and glaucoma. Currently, the preferred methods to visualize ocular blood perfusion in the clinic are fluorescein angiography (FA) and indocyanine green angiography (ICGA). Both provide detailed maps of the retina and choroid that are useful in decision making. However, injecting dyes with possible side effects is undesirable ...
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    6. The study of effects of pore architecture in chitosan scaffolds on the fluid flow pattern by Doppler OCT

      The study of effects of pore architecture in chitosan scaffolds on the fluid flow pattern by Doppler OCT
      Optimizing and fully understanding the dynamic culture conditions in tissue engineering could accelerate exploration of this new technique into a promising therapy in the medical field. Scaffolds used in tissue engineering usually are highly porous with various pore architecture depending on techniques that manufacture them. Perfusing culture fluid through a scaffold in a bioreactor has proven efficient in enhancing the exchange of nutrients and gas within cell-scaffold constructs. Upon perfusion ...
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    7. Characterizing matrix remodeling in collagen gels using optical coherence tomography

      Characterizing matrix remodeling in collagen gels using optical coherence tomography
      Optical coherence tomography (OCT) has shown promise at non-destructively characterizing engineered tissues such as collagen gels. However, as the collagen gels develop, the OCT images lose contrast of structures as the gels develop, making visual assessment difficult. Our group proposed quantitatively characterizing these gels by fitting the optical properties from the OCT signals. In this paper, we imaged collagen gels seeded with smooth muscle cells (SMCs) over a 5-day period ...
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    8. High-resolution computed tomography of refractive index distribution by transillumination low-coherence interferometry

      High-resolution computed tomography of refractive index distribution by transillumination low-coherence interferometry
      We present a method to image refractive index distribution within a sample across 8 mm dimension with high spatial resolution by a transmission low-coherence interferometer. The relative strong forward-scattering light is collected, from which the parallel projections of refractive indices within the sample are obtained. A convolution backprojection algorithm is used to transform the projection data set recorded at sufficient angular views into the spatial distribution of refractive indices within ...
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    9. High-speed, full-range optical coherence tomography

      High-speed, full-range optical coherence tomography
      A new technique to remove complex-conjugate artifacts inherent to conventional Fourier-domain interferometry can double accessible imaging depth. In the past decade, optical coherence tomography (OCT)1 has emerged as an important, noninvasive tool for depth-resolved imaging of biological structures. Current developments are shifting its focus toward spectral-domain and swept-source techniques, since these frequency-domain OCT (FDOCT) versions have better acquisition speed and sensitivity than time-domain imaging.2 However, a major drawback ...
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    10. Efficient postacquisition synchronization of 4-D nongated cardiac images obtained from optical coherence tomography: application to 4-D reconstruction of the chick embryonic heart

      ...ision of Biomedical Engineering, 3303 SW Bond Ave., Mail Code CH13B, Portland, Oregon 97239 Kent L. Thornburg Oregon Health & Science University, Heart Research Center, 3303 SW Bond Ave., Mail Code: CH15H, Portland, Oreg...
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    11. 391-405 of 433 « 1 2 ... 24 25 26 27 28 29 »
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  2. About Oregon Health & Science University

    Oregon Health & Science University

    Oregon Health & Science University (OHSU) is a public university in Oregon with a main campus, including three hospitals, in Portland and a smaller campus in Hillsboro. It was formed in 1974 as the University of Oregon Health Sciences Center, combining state dentistry, medicine, and nursing programs into a single center. It was renamed Oregon Health Sciences University in 1981 and took its current name in 2001, as part of a merger with the Oregon Graduate Institute of Science and Technology (OGI) in Hillsboro. In addition, the university has several partnership programs including a joint PharmD Pharmacy program with Oregon State University.