Search Results 1-20 of 289

  • Characteristics of MR Imaging for Staging and Survival Analysis of Neuroendocrine Carcinoma of the Endometrium: A Multicenter Study in Japan

    Kitajima Kazuhiro , Fukukura Yoshihiko , Munechika Jiro , Fujinaga Yasunari , Fukunaga Takeru , Tanabe Masahiro , Kanie Yuichiro , Kido Ayumu , Tamada Tsutomu , Yoshida Rika , Kamishima Yuki , Kihara Takako , Yamakado Koichiro , Kawanaka Yusuke , Takahama Junko , Ueno Yoshiko , Murakami Takamichi , Yoshida Kotaro , Kato Fumi , Takahata Akiko

    … All tumors had restricted diffusion (apparent diffusion coefficient map low signal intensity, diffusion weighted imaging high signal intensity). … signal intensity throughout the myometrium with normal uterine architecture loss and obvious restricted diffusion throughout the tumor are suggestive features of endometrial NEC. …

    Magnetic Resonance in Medical Sciences, 2020

    J-STAGE 

  • Cholangiocarcinoma after flow diversion surgery for congenital biliary dilatation: A case report and review of literature

    Ataka Ryo , Ito Takashi , Masui Toshihiko , Seo Satoru , Ishii Takamichi , Ogiso Satoshi , Yagi Shintaro , Taura Kojiro , Uemoto Shinji

    … Fluorodeoxyglucose positron emission tomography showed high uptake, and magnetic resonance imaging showed restricted diffusion signals. …

    World journal of hepatology 11(11), 743-751, 2019-11-27

    IR 

  • Development of a novel method for visualizing restricted diffusion using subtraction of apparent diffusion coefficient values

    Yoshimura Yuuki , Kuroda Masahiro , Sugianto Irfan , Khasawneh Abdullah , Bamgbose Babatunde O. , Hamada Kentaro , Barham Majd , Tekiki Nouha , Kurozumi Akira , Matsushita Toshi , Ohno Seiichiro , Kanazawa Susumu , Asaumi Junichi

    … In order to visualize restricted diffusion, the present study developed a novel method called 'apparent diffusion coefficient (ADC) subtraction method (ASM)' and compared it with diffusion kurtosis imaging (DKI). … The diffusion-weighted images of physiological saline, in addtion to bio-phatoms of low cell density and the highest cell density were obtained using two sequences with different effective diffusion times. …

    Molecular Medicine Reports 20(3), 2963-2969, 2019-07-25

    IR 

  • Mechanism of non-steady Petschek-type reconnection with uniform resistivity

    Shibayama Takuya , Kusano Kanya , Miyoshi Takahiro , Bhattacharjee Amitava

    … By contrast, it has proven difficult to achieve Petschek-type reconnection in plasmas with uniform resistivity because sustaining it requires localization of the diffusion region. … In this new type of reconnection, Petschek-type diffusion regions can be formed in connection with plasmoids. …

    Physics of Plasmas 26(3), 032903, 2019-03-25

    IR 

  • A Microdevice for the Assay Paracellular Transport through Tight Junctions  [in Japanese]

    Nakano M. , Sakuma D. , Sunaga F. , Tsugane M. , Suzuki H.

    … By covering the inner space of the microchamber with a cell sheet, the influx and efflux of the substrates are restricted. … If the permeability of TJ is increased by drugs, the target substrate concentration in the microchamber changes due to the diffusion. …

    The Proceedings of the Symposium on Micro-Nano Science and Technology 2019.10(0), 19pm5PN326, 2019

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  • Reversible lesion of splenium of the corpus callosum following traumatic brain injury: a case report  [in Japanese]

    Goto Yudai , Kishida Kengo , Nakasho Takayuki , Yamamoto Hiroyuki , Nakahara Yoshikazu

    … Seven days later, brain MRI showed high signal intensity on diffusion–weighted image in the splenium of the corpus callosum, whereas the apparent diffusion coefficient value was decreased in the same lesion. … Three weeks after the initial brain MRI, follow–up brain MRI showed complete resolution of the previously–observed restricted diffusion lesion in the splenium of the corpus callosum. …

    Neurotraumatology 42(2), 207-210, 2019

    J-STAGE  Ichushi Web 

  • A Microdevice for Evaluation of the Barrier Function of Tight Junction  [in Japanese]

    NAKANO Masayoshi , TSUGANE Mamiko , SUZUKI Hiroaki

    … If the inner space of the microchamber is closed by a cell sheet, the inflow and outflow of the matter is restricted. … If the permeability of TJ is increased by drugs, the target substance concentration in the microchamber changes due to the diffusion. …

    The Proceedings of Mechanical Engineering Congress, Japan 2019(0), J02204, 2019

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  • A case of anti-myelin oligodendrocyte glycoprotein antibody positive acute disseminated encephalomyelitis with brain magnetic resonance imaging exhibiting cerebral cortex lesions and restricted diffusion  [in Japanese]

    Nishimura Naoto , Matsumoto Hiroshi , Honda Mamoru , Uematsu Kenji , Zaha Kiyotaka , Nakamura Yasuko , Nonoyama Shigeaki

    … Brain MRI revealed high signal intensity lesions mainly in the temporal, insular, and frontal lobe cortexes on T2- and diffusion-weighted images. … The atypical MRI findings in this case, namely restricted diffusion mainly on the cerebral cortex, may extend the clinical spectrum of anti-MOG antibody positive ADEM.</p> …

    NO TO HATTATSU 51(5), 318-322, 2019

    J-STAGE  Ichushi Web 

  • Structural Analysis for Interface of Particle-Filled Compositeand Pressure-Sensitive Adhesive Using Pulse NMR  [in Japanese]

    NAKAMURA Yoshinobu , KASHIHARA Yusuke , HIRAI Tomoyasu , FUJII Syuji

    … This pair is completely miscible,whereas mutual diffusion of both polymers is restricted within the interfacial phase by the crosslinking points.The interfacial thickness was estimated using the pulse NMR. …

    Journal of The Adhesion Society of Japan 55(7), 271-277, 2019

    J-STAGE 

  • <i>In Situ</i> Observations of Nucleation and Growth Behavior on Fe<sub>2</sub>Al<sub>5</sub> Intermetallic Compound Formed in Molten Zinc Bath  [in Japanese]

    Katsura Sho , Sasaki Ryo , Nakatsuka Noriaki , Yasuda Hideyuki

    … particles is restricted by the diffusion of Fe, Al components. …

    Tetsu-to-Hagane 105(7), 709-715, 2019

    J-STAGE 

  • Chemical toughening of glass by potassium diffusion: how non-bridging oxygen and a surface calcium barrier limit the process

    TAKAMURE Noboru , McKENZIE David Robert , BILEK Marcela Maria Malena , KONDYURIN Alexey

    … <p>Chemical toughening of soda-lime glass by in-diffusion of potassium from a molten salt to replace sodium is currently restricted to applications where thermal tempering is not suitable, such as toughening of thin glass and complex shaped objects. … Chemical toughening would be more attractive as a commercial process if it could be made more rapid by elevating the temperature, accelerating the diffusion process. …

    Journal of the Ceramic Society of Japan 127(2), 98-104, 2019

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  • Visualization of synchronous or asynchronous release of single synaptic vesicle in active-zone-like membrane formed on neuroligin-coated glass surface

    Funahashi Junichiro , Tanaka Hiromitsu , Hirano Tomoo

    … The diffusion coefficient of Syp-SEP on the presynaptic plasma membrane after the membrane fusion was estimated to be 0.17–0.19 μm²/s, suggesting that Syp-SEP diffused without significant obstruction. … Synchronous exocytosis just after the electrical stimulation tended to occur at multiple restricted sites within an AZLM, whereas locations of asynchronous release occurring later after the stimulation tended to be more scattered. …

    Frontiers in Cellular Neuroscience (12), 2018-05-23

    IR 

  • Diffusion-weighted Magnetic Resonance Imaging in the Pancreas of Fulminant Type 1 Diabetes  [in Japanese]

    Ayumi Tokunaga , Oikawa Yoichi , Osawa Haruhiko , Kajio Hiroshi , Kawasaki Eiji , Kawabata Yumiko , Kozawa Junji , Shimada Akira , Takahashi Kazuma , Tanaka Shoichiro , Chujo Daisuke , Imagawa Akihisa , Fukui Tomoyasu , Miura Junnosuke , Yasuda Kazuki , Yasuda Hisafumi , Kobayashi Tetsuro , Hanafusa Toshiaki , for the consultation of Japan Diabetes Society Committee on Fulminant Type 1 Diabetes Mellitus Research , Nishio Hiroshi , Hayata Satoshi , Shimomura Iichiro , Abiru Norio , Awata Takuya , Ikegami Hiroshi , Uchigata Yasuko

    Diffusion-weighted magnetic resonance imaging (DWI) is an imaging technique that reflects restricted diffusion in organs and can detect mononuclear cell infiltration into the pancreas at the onset of the disease. … Fourteen patients with fulminant type 1 diabetes who underwent abdominal magnetic resonance imaging (MRI) were recruited for the measurement of apparent diffusion coefficient (ADC) values of the pancreas that were compared with those of 21 non-diabetic controls. …

    Journal of the Japan Diabetes Society 61(12), 840-849, 2018

    J-STAGE  Ichushi Web 

  • Acute Thrombectomy for Cerebral Infarction: Comparative Study between Patients over 85 Years Old and Those below 85 Years Old

    Oichi Yuki , Hayase Makoto , Miyakoshi Akinori , Go Kohichi , Kawauchi Takeshi , Sano Noritaka , Toda Hiroki

    … Of patients with acute cerebral infarction who underwent thrombectomy in our hospital between October 2014 and September 2017, the subjects were those with an interval of ≤8 hours from onset until arrival, a diffusion-weighted imaging-alberta stroke program early CT score (DWI-ASPECTS) of ≥6, and occlusion of the internal carotid (IC) artery, middle cerebral artery M1/M2, basilar artery (BA), or posterior cerebral artery P1.</p><p><b>Results:</b> …

    Journal of Neuroendovascular Therapy 12(9), 423-430, 2018

    J-STAGE  Ichushi Web 

  • A case of painful seizure accompanying ictal paresis and homonymous hemianopia due to post-stroke epilepsy  [in Japanese]

    Tanaka Kanta , Hashimoto Shuji , Harada Yuzuru , Kageyama Takashi , Suenaga Toshihiko

    … Ictal MRI showed restricted diffusion in the postcentral gyrus and dilatation of distal branches of the left middle cerebral artery (MCA). … MRI demonstrated resolution of the restricted diffusion and the MCA dilatation. …

    Rinsho Shinkeigaku 58(8), 492-498, 2018

    J-STAGE  Ichushi Web 

  • Spatial Restriction within Intracranial Epidermoid Cysts Observed Using Short Diffusion-time Diffusion-weighted Imaging

    Andica Christina , Feiweier Thorsten , Murata Katsutoshi , Arakawa Atsushi , Kondo Akihide , Akiyama Osamu , Aoki Shigeki , Hori Masaaki , Kamiya Kouhei , Koshino Saori , Hagiwara Akifumi , Kamagata Koji , Fukunaga Issei , Hamasaki Nozomi , Suzuki Michimasa

    … Both cases were scanned with diffusion-weighted imaging using pulsed gradient spin-echo (PGSE) and oscillating gradient spin-echo (OGSE; … 50 Hz) prototype sequences with diffusion times of 47.3 ms and 8.5 ms, respectively. … The apparent diffusion coefficient measured by OGSE was higher than that measured by PGSE, indicating the spatial restriction of water diffusion in the laminated keratin layers within the cyst as demonstrated by histopathology.</p> …

    Magnetic Resonance in Medical Sciences 17(3), 269-272, 2018

    J-STAGE  Ichushi Web 

  • Comparison of Glass Capillary Plates and Polyethylene Fiber Bundles as Phantoms to Assess the Quality of Diffusion Tensor Imaging

    Tachibana Atsushi , Tachibana Yasuhiko , Kershaw Jeff , Sano Hiromi , Fukushi Masahiro , Obata Takayuki

    … <p>Purpose: The purpose of this study was to evaluate the suitability of two phantoms, one made of capillary plates and the other polyethylene fibers, for assessing the quality of diffusion tensor imaging (DTI).</p><p>Methods: The first phantom was a stack of glass capillary plates with many parallel micropores (CP). … and diffusion-times (<i>T</i><sub>diff</sub>) of 37.7 and 97.7 ms on a preclinical 7T MRI scanner. …

    Magnetic Resonance in Medical Sciences 17(3), 251-258, 2018

    J-STAGE  Ichushi Web 

  • Analysis of Thickness of Interfacial Layer Using Pulse NMRfor The Model System of Incompatible Polymer Blend  [in Japanese]

    NAKAMURA Yoshinobu , SASAKI Mariko , MATSUMOTO Takuya , MIYAZAKI Ken-ichi , TSUTSUMI Ryota , NODA Masayo , TAKAKURA Kazuki , FUJII Syuji , FUJIWARA Kazuko , HIKASA Shigeki

    … In contrast, mutual diffusion of the polymer chains was restricted withinthe particle/matrix interfacial layer for crosslinked particles. … Dynamic mechanical analysis indicated that the composite has four phases of PVC (A), PBMA(B), PBMA in which molecular mobility was restricted by crosslinking point (C) and interfacial layer (D). …

    Journal of The Adhesion Society of Japan 53(6), 202-209, 2017

    J-STAGE 

  • MRI for abdominal pathologies in children  [in Japanese]

    Miyasaka Mikiko

    … <p>Diffusion-weighted imaging (DWI) is a special application of MRI that derives its contrast from differences in water molecule mobility in different tissues and structures. … Water molecule mobility is restricted in tissues with higher cellular density, intact cell membranes and more complex fluid. …

    Journal of Japanese Society of Pediatric Radiology 33(2), 122-132, 2017

    J-STAGE  Ichushi Web 

  • Transient Prosopometamorphopsia Restricted to the Left Eye Caused by Ischemia at the Right Splenium of the Corpus Callosum

    Funatsu Naoko , Hayakawa Mikito , Tokuda Naoki , Toyoda Kazunori

    … <p>We herein report a patient who developed transient prosopometamorphopsia restricted to the left eye caused by ischemia of the right splenium of the corpus callosum. … Diffusion-weighted magnetic resonance imaging showed a small, hyperintense lesion at the right splenium of the corpus callosum. …

    Internal Medicine 56(21), 2933-2935, 2017

    J-STAGE  Ichushi Web 

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