University of Tsukuba

1. Mentioned In 46 Articles

2. Optical image measuring device, optical image measuring program, fundus observation device, and fundus observation program

   Explore Article uspto.gov (Jul 13 2010) Ophthalmology , Patents

   An optical image measuring device which can form a highly reliable image even if an object moves during scanning of a signal light is provided. An optical image forming device 1 comprises: an interferometer that splits a low coherence light L0 into a signal light LS and a reference light LR and generates an interference light LC by overlaying the signal light LS reflected by a fundus oculi with the ... (Read Full Article)
   

   Comment on Article Mentions:   Topcon Medical Systems   Yoshiaki Yasuno   University of Tsukuba

3. Full-range polarization-sensitive swept-source optical coherence tomography by simultaneous transversal and spectral modulation

   Explore Article opticsinfobase.org (Jun 15 2010) Ophthalmology , Tunable Sources

   Polarization-sensitive swept-source optical coherence tomography (PS-SS-OCT) is used to measure three-dimensional phase-retardation images of birefringent biological tissue in vivo. PS-SS-OCT with continuous source polarization modulation is used to multiplex the incident states of polarization in the signal frequency of each A-scan. Although it offers the advantage of measurement speed that is as high as that of standard SS-OCT, its disadvantage is low axial measurement range. To overcome this drawback, we ... (Read Full Article)
   

   Comment on Article Mentions:   Shuichi Makita   Yoshiaki Yasuno   Masahiro Yamanari

4. Multiplexing spectrum interference optical coherence tomography

   Explore Article uspto.gov (May 4 2010) Patents

   The present invention achieves multiplexing spectrum interference optical coherence tomography capable of full-range OCT measurement that causes no delays in measurement time due to high-order scans and is also free from complex conjugated images. This multiplexing spectrum interference optical coherence tomography comprises: a first beam splitter 3 positioned in an optical path 2 from a light source 1 and used to separate an object light 4 and a reference light ... (Read Full Article)
   

   Comment on Article Mentions:   Yoshiaki Yasuno   University of Tsukuba

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

   Explore Article opticsinfobase.org (Apr 8 2010) Ophthalmology

   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 fiber layer and ... (Read Full Article)
   

   Comment on Article Mentions:   Shuichi Makita   Yoshiaki Yasuno   Masahiro Yamanari

6. High-sensitive blood flow imaging of the retina and choroid by using double-beam optical coherence angiography

   Explore Article SPIE Digital Library (Mar 5 2010) Ophthalmology , Doppler

   ...ce Manns, Per G. Söderberg, Arthur Ho ABSTRACT REFERENCES (17) Shuichi Makita and Masahiro Yamanari Univ. of Tsukuba (Japan) and Computational Optics and Ophthalmology Group (Japan) Masahiro Miura Tokyo Medical Univ.... (Read Full Article)
   

   Comment on Article Mentions:   Shuichi Makita   Yoshiaki Yasuno   Masahiro Miura

7. Tissue discrimination in anterior eye using three optical parameters obtained by polarization sensitive optical coherence tomography

   Explore Article SPIE Digital Library (Mar 2 2010) Ophthalmology

   ... Söderberg, Arthur Ho ABSTRACT REFERENCES (5) Arata Miyazawa, Masahiro Yamanari, and Shuichi Makita Univ. of Tsukuba (Japan) and Computational Optics and Ophthalmology Group (Japan) Masahiro Miura Tokyo Medical Univ.... (Read Full Article)
   

   Comment on Article Mentions:   Shuichi Makita   Masahiro Miura   Masahiro Yamanari

8. Polarization sensitive corneal and anterior segment swept-source optical coherence tomography

   Explore Article SPIE Digital Library (Mar 2 2010) Ophthalmology

   ... G. Söderberg, Arthur Ho ABSTRACT REFERENCES (4) Yiheng Lim, Masahiro Yamanari, and Yoshiaki Yasuno Univ. of Tsukuba (Japan) and Computational Optics and Ophthalmology Group (Japan) We^ develop a compact polarization... (Read Full Article)
   

   Comment on Article Mentions:   Yoshiaki Yasuno   Masahiro Yamanari   University of Tsukuba

9. Adaptive optics spectral domain optical coherence tomography with one-micrometer light source

   Explore Article SPIE Digital Library (Feb 19 2010) Ophthalmology

   ...ABSTRACT REFERENCES (22) Kazuhiro Kurokawa, Kazuhiro Sasaki, Shuichi Makita, and Yoshiaki Yasuno Univ. of Tsukuba (Japan) and Computational Optics and Ophthalmology Group (Japan) Adaptive^ optics spectral domain o... (Read Full Article)
   

   Comment on Article Mentions:   Shuichi Makita   Yoshiaki Yasuno   University of Tsukuba

10. Parabolic BM-scan technique for full range Doppler spectral domain optical coherence tomography

    Explore Article opticsinfobase.org (Jan 12 2010) Doppler

    A full range spectral domain optical coherence tomography (SD-OCT) technique that relies on the linear phase modulation of one of the interferometer arms has been widely utilized. Although this method is useful, the mirror image elimination is not perfect for samples in which regions with high axial motion exist. In this paper, we introduce a new modulation pattern to overcome this mirror image elimination failure. This new modulation is a ... (Read Full Article)
    

    Comment on Article Mentions:   Shuichi Makita   Yoshiaki Yasuno   University of Tsukuba

11. Adaptive optics retinal scanner for one-micrometer light source

    Explore Article opticsinfobase.org (Jan 12 2010) Ophthalmology

    We developed an adaptive optics (AO) retinal scanner by using a light source with a center wavelength of 1-um. In a recent study on optical coherence tomography (OCT), it was proved that 1-um light provided higher image contrast of deep region of the eye than 840-nm light. Further, high lateral resolution retinal images were obtained with AO. In this study, we performed measurements on two normal subjects in the AO-SLO ... (Read Full Article)
    

    Comment on Article Mentions:   Shuichi Makita   Yoshiaki Yasuno   University of Tsukuba

12. Generalized Jones matrix optical coherence tomography: performance and local birefringence imaging

    Explore Article opticsinfobase.org (Jan 6 2010) Dermatology , Ophthalmology

    Phase retardation imaging including local birefringence imaging of biological tissues is described by generalized Jones-matrix optical coherence tomography. The polarization properties of a local tissue can be obtained from two Jones matrices that are measured by backscattered lights from the front and back boundaries of the local tissue. The error in the phase retardation measurement due to background noise is analyzed theoretically, numerically, and experimentally. The minimum detectable phase retardation ... (Read Full Article)
    

    Comment on Article Mentions:   Shuichi Makita   Yoshiaki Yasuno   Masahiro Yamanari

13. Polarization-Sensitive Optical Coherence Tomography of Necrotizing Scleritis

    Explore Article Ophthalmic Surgery, Lasers and Imaging (Nov 26 2009) Ophthalmology

    ...al University, Kasumigaura Hospital, Inashiki; the Computational Optics Group (MM, MY, MI, TY, YY), University of Tsukuba, Tsukuba; and the Computational Optics and Ophthalmology Group (MM, MY, TI, YY), Tsukuba, Japan. Ac... (Read Full Article)
    

    Comment on Article Mentions:   Yoshiaki Yasuno   Masahiro Miura   Masahiro Yamanari

14. Automated Segmentation of the Human Macula by Optical Coherence Tomography

    Explore Article Optical Coherence Tomography News (Oct 11 2009) Ophthalmology

    ... and Measurement Techniques Laboratory at the University of Oulu, Computational Optics Group at the University of Tsukuba, and Department of Ophthalmology at Tokyo Medical University have recently published very interesti... (Read Full Article)
    

    Comment on Article Mentions:   Tapio Fabritius   University of Oulu   University of Tsukuba

15. Tissue discrimination in anterior eye using three optical parameters obtainedby polarization sensitive optical coherence tomography

    Explore Article opticsinfobase.org (Sep 15 2009) Ophthalmology

    We developed a tissue discrimination algorithm of polarization sensitive optical coherence tomography (PS-OCT) based on the optical properties of tissues. We calculated the three-dimensional (3D) feature vector from the parameters intensity, extinction coefficient, birefringence, which were obtained by PS-OCT. The tissue type of each pixel was determined according to the position of the feature vector in the 3D feature space. The algorithm was applied for discriminating tissues of the human ... (Read Full Article)
    

    Comment on Article Mentions:   Shuichi Makita   Yoshiaki Yasuno   Masahiro Yamanari

16. Relationship between dermal birefringence and the skin surface roughness of photoaged human skin

    Explore Article SPIE Digital Library (Aug 25 2009) Dermatology

    ... Kotobuki, Odawara, Kanagawa 250-0002, Japan Masahiro Yamanari, Arata Miyazawa, and Yoshiaki Yasuno University of Tsukuba, Computational Optics Group, Tennodai 1-1-1, Tsukuba, Ibaraki 305-8573, Japan Masayuki Matsumoto Ka... (Read Full Article)
    

    Comment on Article Mentions:   Yoshiaki Yasuno   Masahiro Yamanari   University of Tsukuba

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