1. Oregon Health & Science University

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    1. Mentioned In 454 Articles

    2. 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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    3. 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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    4. 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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    5. Feature Of The Week 6/7/09: Optical micro-angiography: A label-free imaging technique to image blood perfusion within microcirculation tissue beds

      Feature Of The Week 6/7/09: Optical micro-angiography: A label-free imaging technique to image blood perfusion within microcirculation tissue beds
      .../7/09: Researchers from the Biophotonics and Imaging Laboratory (BAIL) at Oregon Health & Science University (OHSU) have pioneered a new volumetric imaging modality, optical micro-angiography (OMAG) that is capable of im...
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    6. Doppler optical micro-angiography for volumetric imaging of vascular perfusion in vivo

      Doppler optical micro-angiography for volumetric imaging of vascular perfusion in vivo
      We propose a Doppler optical micro-angiography (DOMAG) method to image flow velocities of the blood flowing in functional vessels within microcirculatory tissue beds in vivo. The method takes the advantages of recently developed optical micro-angiography (OMAG) technology, in which the endogenous optical signals backscattered from the moving blood cells are isolated from those originated from the tissue background, i.e., the tissue microstructures. The phase difference between adjacent A scans ...
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    7. Optically characterizing collagen gels made with different cell types

      Optically characterizing collagen gels made with different cell types
      The ability of optical imaging techniques such as optical coherence tomography (OCT) to non-destructively characterize tissue-engineered constructs has generated enormous interest recently. Collagen gels are 3D structures that represent a simple common model of many engineered tissues that contain 2 primary scatterers: collagen and cells. We are testing the ability of OCT data to characterize the remodeling of such collagen-based constructs by 3 different types of cells: vascular smooth muscle ...
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    8. The effect of wavelength on optical properties extracted from images of engineered tissue

      The effect of wavelength on optical properties extracted from images of engineered tissue
      Optical imaging modalities such as confocal microscopy and optical coherence tomography (OCT) are emerging as appealing methods for non-destructive evaluation of engineered tissues. The information offered by such optical imaging methods depends on the wavelength vis-á-vis the optical scattering properties of the sample. These properties affect many factors critical to image analysis in a nonlinear and nontrivial manner. Thus, we sought to characterize the effect wavelength has on the optical ...
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    9. In vivo volumetric blood flow imaging using optical microangiography at capillary level resolution

      Optical micro-angiography (OMAG) [1,2,3] is a recently developed imaging method, capable of resolving 3D distribution of dynamic blood perfusion at the capillary level within microcirculatory beds in vivo. The imaging contrast of blood perfusion is based on the endogenous light scattering from the moving blood cells within biological tissue; thus no exogenous contrasting agents are necessary. This is achieved by efficient separation of the moving scattering elements from ...
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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.