1. Nagoya University

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    1. Mentioned In 49 Articles

    2. Extraction of membrane structure in eyeball from MR volumes

      Extraction of membrane structure in eyeball from MR volumes
      This paper presents an accurate extraction method of spherical shaped membrane structures in the eyeball from MR volumes. In ophthalmic surgery, operation field is limited to a small region. Patient specific surgical simulation is useful to reduce complications. Understanding of tissue structure in the eyeball of a patient is required to achieve patient specific surgical simulations. Previous extraction methods of tissue structure in the eyeball use optical coherence tomography (OCT ...
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    3. Full-range ultrahigh-resolution spectral-domain optical coherence tomography in 1.7 µm wavelength region for deep-penetration and high-resolution imaging of turbid tissues

      Full-range ultrahigh-resolution spectral-domain optical coherence tomography in 1.7 µm wavelength region for deep-penetration and high-resolution imaging of turbid tissues
      For the first time, we developed a full-range ultrahigh-resolution (UHR) spectral-domain optical coherence tomography (SD-OCT) technique working in the 1.7 m wavelength region. This technique allowed high-resolution, deep-tissue imaging. By using a supercontinuum source operating at a wavelength of 1.7 m, an axial resolution of 3.6 m in a tissue specimen was achieved. To enhance the imaging depth of UHR-SD-OCT, we performed full-range OCT imaging based on ...
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    4. Preoperative optical coherence tomography visualization of epiretinal membranes enhances surgical strategies

      Preoperative optical coherence tomography visualization of epiretinal membranes enhances surgical strategies
      Purpose: The aim of this study was to evaluate the usefulness of preoperative optical coherence tomography (OCT) findings in patients with macular epiretinal membrane (ERM) for the planning of surgical strategy. Patients and methods: One hundred twenty-three eyes of 121 patients (49 men, 72 women; mean age, 66 years) with an idiopathic ERM were enrolled. All patients underwent an ophthalmic examination including indirect ophthalmoscopy and OCT (Cirrus HD-OCT 4000 and ...
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    5. Retinal Hemodynamics Seen on Optical Coherence Tomography Angiography Before and After Treatment of Retinal Vein Occlusion

      Retinal Hemodynamics Seen on Optical Coherence Tomography Angiography Before and After Treatment of Retinal Vein Occlusion
      Purpose : This study evaluates the retinal hemodynamics using optical coherence tomography angiography (OCTA) before and after antivascular endothelial growth factor (VEGF) therapy in patients with macular edema associated with retinal vein occlusion (RVO). Methods : Twelve patients (23 eyes; mean age, 64 years) were included (eight eyes with branch RVO, four with central RVO, and 11 unaffected fellow eyes. The best-corrected visual acuity (BCVA) and central retinal thickness (CRT) were measured ...
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    6. Wideband ultrafast fiber laser sources for OCT and metrology

      Wideband ultrafast fiber laser sources for OCT and metrology
      Fiber lasers, which use optical fibers as ideal waveguides, have been attracting a great deal of attention as stable, practical, and maintenance-free lasers. Using a combination of an ultrashort-pulse fiber laser and a nonlinear fiber, we can realize wideband highly functional ultrafast fiber laser sources. The generation of ultrashort pulses with wide wavelength tunability and supercontinua based on fiber lasers and nonlinear fibers has been demonstrated. These techniques are useful ...
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    7. Development of a Fiber-Optic Optical Coherence Tomography Probe for Intraocular Use

      Development of a Fiber-Optic Optical Coherence Tomography Probe for Intraocular Use
      Purpose : To evaluate the performance of a newly developed 23-G optical coherence tomography (OCT) probe in animal and human eyes. Methods : The probe is a side-imaging OCT device with a scanning beam set 43 to the optical axis and a working distance of 1.5 to 2.0 mm. The performance of the OCT probe was tested during vitrectomy in porcine cadaver eyes and rabbit eyes in situ. Optical coherence ...
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    8. Optical coherence microscopy in 1700 nm spectral band for high-resolution label-free deep-tissue imaging

      Optical coherence microscopy in 1700 nm spectral band for high-resolution label-free deep-tissue imaging
      Optical coherence microscopy (OCM) is a label-free, high-resolution, three-dimensional (3D) imaging technique based on optical coherence tomography (OCT) and confocal microscopy. Here, we report that the 1700-nm spectral band has the great potential to improve the imaging depth in high-resolution OCM imaging of animal tissues. Recent studies to improve the imaging depth in OCT revealed that the 1700-nm spectral band is a promising choice for imaging turbid scattering tissues due ...
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    9. Investigation of the Etiology of Central Serous Chorioretinopathy Using En-Face Optical Coherence Tomography and Indocyanine Green Angiography

      Investigation of the Etiology of Central Serous Chorioretinopathy Using En-Face Optical Coherence Tomography and Indocyanine Green Angiography
      Purpose: To identify locations of hypofluorescent lesions on late-phase indocyanine green angiography (ICGA) in patients with central serous chorioretinopathy (CSC) using en-face optical coherence tomography (OCT). Procedures: We retrospectively studied 25 consecutive untreated CSC patients, using swept-source OCT and ICGA. En-face swept-source OCT images were automatically segmented and flattened with Bruch's membrane (BrM). We compared the sizes of hyperreflective areas in the 25 CSC and 25 contralateral eyes on ...
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    10. Wide-field optical coherence tomography angiography using extended field imaging technique to evaluate the nonperfusion area in retinal vein occlusion

      Wide-field optical coherence tomography angiography using extended field imaging technique to evaluate the nonperfusion area in retinal vein occlusion
      Purpose: Optical coherence tomography angiography (OCTA) is a newly developed technology which allows us to reconstruct the three-dimensional chorioretinal vasculature without dye injection. OCTA is a noninvasive, rapid, and reproducible method to assess retinal ischemia. However, one of its limitations is the size of scanning area. A novel yet simple technique to expand the scan length on optical coherence tomography has been reported as an extended field imaging (EFI) technique ...
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    11. Characteristics of Polypoidal Choroidal Vasculopathy Evaluated by Optical Coherence Tomography Angiography

      Characteristics of Polypoidal Choroidal Vasculopathy Evaluated by Optical Coherence Tomography Angiography
      Purpose : The purpose of this study was to compare the angiographic findings of polypoidal choroidal vasculopathy (PCV) detected by indocyanine green angiography (ICGA) and en face optical coherence tomography angiography (OCTA). Methods : The study design was a retrospective chart review of 20 eyes with a clinical diagnosis of treatment-naive PCV, seen at Nagoya City University Hospital between December 2014 and January 2016. Indocyanine green angiography was performed with Heidelberg Retina ...
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    12. Influence of Clinical Factors and Magnification Correction on Normal Thickness Profiles of Macular Retinal Layers Using Optical Coherence Tomography

      Influence of Clinical Factors and Magnification Correction on Normal Thickness Profiles of Macular Retinal Layers Using Optical Coherence Tomography
      ... prospective, cross-sectional, multicenter study conducted in six clinical centers; Kyoto University (Japan), Nagoya University (Japan), Kanazawa University (Japan), the National University Health System (Singapore), Tok...
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    13. Highly functional ultrashort pulse fiber laser sources and applications for optical coherence tomography

      Highly functional ultrashort pulse fiber laser sources and applications for optical coherence tomography
      We have been investigating highly functional ultrashort pulse fiber laser sources for highly sensitive, ultrahigh resolution optical coherence tomography (UHR-OCT). The coherent, low-noise, and Gaussian like wideband super-continuum (SC) sources were developed at five different wavelength regions between 0.8 and 1.7 um in order to investigate the wavelength dependence of OCT imaging. A real-time imaging was achieved with spectral domain OCT system. A fiber laser based, rapid, widely ...
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    14. 0.54 μm resolution two-photon interference with dispersion cancellation for quantum optical coherence tomography

      0.54 μm resolution two-photon interference with dispersion cancellation for quantum optical coherence tomography
      Quantum information technologies harness the intrinsic nature of quantum theory to beat the limitations of the classical methods for information processing and communication. Recently, the application of quantum features to metrology has attracted much attention. Quantum optical coherence tomography (QOCT), which utilizes two-photon interference between entangled photon pairs, is a promising approach to overcome the problem with optical coherence tomography (OCT): As the resolution of OCT becomes higher, degradation of ...
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    15. ENLARGEMENT OF FOVEAL AVASCULAR ZONE IN DIABETIC EYES EVALUATED BY EN FACE OPTICAL COHERENCE TOMOGRAPHY ANGIOGRAPHY

      ENLARGEMENT OF FOVEAL AVASCULAR ZONE IN DIABETIC EYES EVALUATED BY EN FACE OPTICAL COHERENCE TOMOGRAPHY ANGIOGRAPHY
      Purpose: To evaluate the area of the foveal avascular zone (FAZ) detected by en face OCTA (AngioVue, Avanti OCT; Optovue) in healthy and diabetic eyes. Methods: Retrospective chart review of patients who underwent fundus examination including en face OCTA. Eyes with proliferative diabetic retinopathy and history of laser photocoagulation were excluded. The FAZ area in the superficial and deep plexus layers were measured and evaluated using ImageJ software. Results: The ...
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    16. Non-destructive cross-sectional imaging of tomato using ultra-high resolution optical coherence tomography

      Non-destructive cross-sectional imaging of tomato using ultra-high resolution optical coherence tomography
      Optical coherence tomography is an optical imaging technique that performs non-destructive cross-sectional imaging of micrometer-scale structures in samples. In this report, we demonstrated the visualization of inner structures in tomato fruits and leaves with ultra-high resolution optical coherence tomography (UHR-OCT) using fiber based laser source with ultra-broadband continuous spectrum around 1.7 m wavelength. We confirmed that our UHR-OCT system allows us to perform cross-sectional imaging of tomato fruits and ...
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    17. 1-15 of 49 1 2 3 4 »
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  2. About Nagoya University

    Nagoya University

    Nagoya University is a Japanese national university headquartered in Chikusa-ku, Nagoya. It is one of the former 9 imperial universities. Nagoya University began its history in 1871 with its temporary hospital standing on a site where the conference chamber for the former Nagoya clan once stood, and the temporary medical school standing on a site where the magistrate's office for the former Nagoya clan once stood. Thereafter, many transitions took place, and the Aichi Medical College was established in 1920. In 1931, the management of the Aichi Medical College was transferred to the national government and the Nagoya Medical College was newly established in the same year. In 1939, the Nagoya Imperial University was established with the addition of the School of Science and Engineering and the School of Medicine, thus absorbing the Nagoya Medical College.