1. University of Tsukuba

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    1. Mentioned In 117 Articles

    2. Noninvasive Vascular Imaging of Polypoidal Choroidal Vasculopathy by Doppler Optical Coherence Tomography

      Noninvasive Vascular Imaging of Polypoidal Choroidal Vasculopathy by Doppler Optical Coherence Tomography
      Purpose. To noninvasively investigate the vascular architecture of polypoidal lesions in polypoidal choroidal vasculopathy (PCV) using Doppler optical coherence tomography (OCT), and to evaluate the clinical usefulness of Doppler OCT for the assessment of therapeutic effects in PCV. Methods. Fifteen eyes of 15 patients with treatment-nave PCV were prospectively studied. Vascular imaging was obtained using 1060-nm swept-source Doppler OCT, and compared with indocyanine green angiography (ICGA) images. The therapeutic effect ...
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    3. Repeatability of Corneal Phase Retardation Measurements by Polarization-Sensitive Optical Coherence Tomography

      Repeatability of Corneal Phase Retardation Measurements by Polarization-Sensitive Optical Coherence Tomography
      Purpose. Polarization-sensitive optical coherence tomography (PS-OCT) can evaluate internal tissue structures of the cornea, such as collagen fibers, by phase retardation measurement. In this study, we assessed the repeatability of corneal phase retardation measurements using anterior segment PS-OCT. Methods. A total of 173 eyes of 173 patients were measured using PS-OCT. In total, 58 eyes of young subjects with normal corneas, 28 eyes of old subjects with normal corneas, 26 ...
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    4. Doppler Optical Coherence Tomography Imaging of Feeder Vessels in Exudative Macular Disease

      Doppler Optical Coherence Tomography Imaging of Feeder Vessels in Exudative Macular Disease
      We evaluated the three-dimensional vascular architecture of feeder vessels in exudative macular disease. A case of polypoidal choroidal vasculopathy with choroidal neovascularization was examined with Doppler optical coherence tomography (OCT), and the three-dimensional architecture of the feeder vessels could be clearly visualized in the Doppler OCT angiography image, showing the site of growth of the feeder vessels passing through Bruchs membrane. Together, the results demonstrated in this case report that ...
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    5. Depth-Resolved Dynamics of Aceto-Whitening in Rabbit Cornea Studied by 1300 nm Optical Coherence Tomography

      Depth-Resolved Dynamics of Aceto-Whitening in Rabbit Cornea Studied by 1300 nm Optical Coherence Tomography
      In many developing parts of the world, colposcopy supplemented by aceto-whitening remains the most widespread means of reliably diagnosing cervical dysplasia, potentially leading to cervical cancer. The use of aceto-whitening to enhance detection rates for Barretts esophagus is also emerging in recent years. Here we quantitatively study the aceto-whitening phenomenon using 1300 nm optical coherence tomography. By exposing a simple epithelial tissue model (excised rabbit cornea) to 0.5 M ...
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    6. STEREOPSIS AND OPTICAL COHERENCE TOMOGRAPHY FINDINGS AFTER EPIRETINAL MEMBRANE SURGERY

      STEREOPSIS AND OPTICAL COHERENCE TOMOGRAPHY FINDINGS AFTER EPIRETINAL MEMBRANE SURGERY
      Purpose: To evaluate stereopsis in patients undergoing vitrectomy for epiretinal membrane and to investigate the relationship between stereopsis and foveal microstructures. Methods: This study included 55 eyes of 55 patients who underwent vitrectomy for unilateral epiretinal membrane and 27 age-matched normal subjects. We examined stereopsis using the Titmus Stereo Test, TNO stereotest, and, optical coherence tomography before surgery and 6 months after surgery. Central foveal thickness, central retinal thickness at ...
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    7. Vascular Response After Zilver PTX Stent Implantation for Superficial Femoral Artery Lesions Serial Optical Coherence Tomography Findings at 6 and 12 Months

      Vascular Response After Zilver PTX Stent Implantation for Superficial Femoral Artery Lesions Serial Optical Coherence Tomography Findings at 6 and 12 Months
      Purpose: To compare the vascular response after paclitaxel-coated nitinol drug-eluting stent (Zilver PTX) implantation for superficial femoral artery lesions after 6 and 12 months using optical coherence tomography (OCT). Methods: Serial OCT examinations were performed in 5 patients (4 men; mean age 78.46.8 years) with 9 Zilver PTX stents at 6- and 12-month follow-up. Variables evaluated included neointimal thickness and apposition on each strut, the incidence of extrastent ...
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    8. In Vivo Evaluation of Fibrous Cap Thickness by Optical Coherence Tomography for Positive Remodeling and Low-attenuation Plaques Assessed by Computed Tomography Angiography

      In Vivo Evaluation of Fibrous Cap Thickness by Optical Coherence Tomography for Positive Remodeling and Low-attenuation Plaques Assessed by Computed Tomography Angiography
      ...es by this author Correspondence * Corresponding author at: Cardiovascular Division, Faculty of Medicine, University of Tsukuba, 1-1-1 Tennodai, Tsukuba, Ibaraki, Japan. correspondence x Akira Sato Search for artic...
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    9. Optical Coherence Tomography Apparatus For Selectively Visualizing And Analyzing Choroid Vascular Plexus, And IMAGE-PROCESSING Program And IMAGE-PROCESSING Method Therefor

      Optical Coherence Tomography Apparatus For Selectively Visualizing And Analyzing Choroid Vascular Plexus, And IMAGE-PROCESSING Program And IMAGE-PROCESSING Method Therefor
      From OCT measurement data, image data for only the choroid vascular plexus present in the choroid layer is selectively extracted and the size of the choroid blood vessels and thickness of the choroid vascular plexus are obtained accurately from the image data, making quantitative evaluation of the choroid vascular plexus possible. The optical coherence tomography apparatus is provided with an optical coherence tomograph and a computer for performing image-processing on ...
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    10. Two beams formed by Wollaston prism in sample arm in an optical coherence tomography apparatus

      Two beams formed by Wollaston prism in sample arm in an optical coherence tomography apparatus
      The scanning speed of a sample in Doppler OCT, etc., is increased to enable quick measurement of blood flow rate, blood flow volume, etc. Wideband light from a light source 2 is linearly polarized by a polarization controller 3 and this linearly polarized beam is split into vertically polarized light and horizontally polarized light using a Wollaston prism 14 at a sample arm, which are then irradiated simultaneously onto two ...
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    11. Noninvasive Evaluation of Phase Retardation in Blebs after Glaucoma Surgery Using Anterior Segment Polarization-Sensitive Optical Coherence Tomography

      Noninvasive Evaluation of Phase Retardation in Blebs after Glaucoma Surgery Using Anterior Segment Polarization-Sensitive Optical Coherence Tomography
      ... 3. ^3Computational Optics Group, University of Tsukuba, Tsukuba, 305-8575, Japan 4. ^4Ophthalmology, University of Tsukuba, 1-1-1 Tennoudai, Tsukuba, Ibaraki, 305-8575, Japan 5. ^5Ophthalmology, University o...
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  2. About University of Tsukuba

    University of Tsukuba

    University of Tsukuba is located in the city of Tsukuba. The university is ranked one of the top Asian universities in the "Academic Ranking of World Universities" and is ranked 102-150 in the world. The University of Tsukuba has had several Nobel Prize winners so far, namely Leo Esaki, Hideki Shirakawa and Sin-Itiro Tomonaga, which is extremely rare among universities in Asia, where there have been fewer Nobel laureates than in European and American universities. 

    The Computational Optics Group (COG)  at the University of Tsukuba formed in 1999 as a division of applied optics laboratory, institute of applied physics, university of Tsukuba. On that moment we were not COG but spatio-temporal optics group, and our main research subject was spatio-temporal optical computing.   In 2000, we started a optical measurement project using spatio-temporal optical computing technologies, and in 2002, we changed our direction to more computationally.   Since 2002, our main research interest is computer assisted optical measurment. We are trying to introduce computational technologies into optical measurement.  Since 2007, we are an independent research group and no longer a part of Applied Optics Laboratory of University of Tsukuba.