Search Results 1-20 of 127

  • MRI-guided percutaneous needle biopsy with 1.2T open MRI : study protocol for a prospective feasibility study (SCIRO-1701)

    Matsui Yusuke , Sakurai Jun , Hiraki Takao , Okamoto Soichiro , Iguchi Toshihiro , Tomita Koji , Uka Mayu , Gobara Hideo , Kanazawa Susumu

    … There has been growing interest in magnetic resonance imaging (MRI)-guided interventional procedures such as percutaneous needle biopsy. … Although open MRI is preferable for MRI-guided procedures in terms of patient accessibility, its inferior imaging capability due to lower field strength is a substantial limitation. … In this situation, the high-field (1.2T) open MRI has recently become available. …

    Nagoya Journal of Medical Science 81(3), 463-468, 2019-08

    IR  DOI 

  • Open MRI Operating Room with Automatic Electronic Recording of Medical Equipment Provided by Wireless LAN - Anesthesia Care Experience of 25 Cases in Hiroshima University Hospital  [in Japanese]

    石井 友美 , 讃岐 美智義 , 加藤 貴大 , 安田 季道 , 原木 俊明 , 河本 昌志

    オープンMRI設置手術室で25例の麻酔を経験した。MRI設置手術室では術中にMRI画像を判断材料として手術をすすめるため,MRI画像へのノイズ混入対策が必要である。また,MRI磁場の影響で術中にモニター機器や麻酔器が誤動作を起こす可能性があるため,MRI非対応機器からの画像ノイズの遮断対策として,電子機器から発生するノイズの軽減には特殊シールドボックスやイキソルメッシュを使用し,手術室外からのノイ …

    麻酔と蘇生 55(1), 13-16, 2019-03-01

    IR  Ichushi Web 

  • MR-guided Nonvascular Interventional Procedures  [in Japanese]

    Shimizu Tadashi

    MR-guidance is the least likely modality to be initially chosen for non-vascular interventional procedures. … Additionally temporal resolution is lower than with the other two modalities when we use low magnetic field open type MR imagers. …

    The Official Journal of the Japanese Society of Interventional Radiology 33(4), 358-363, 2019

    J-STAGE  Ichushi Web 

  • The ratios of rolling and sliding movements of huemral head during axial rotation in the dynamic glenohumeral instability using real-time cine MRI  [in Japanese]

    Matsui Kazuhisa , Tachibana Takashi , Nobuhara Katsuya , Uchiyama Yasushi

    … All subjects were instructed to rotate their shoulders at the arm by side of the body with 15 cycles in one minute while scanning by a 0.4 T open MRI device(Aoerti Eterna, Hitachi Medical Corporation, Japan)and recording by a video camera, simultaneously.</p><p></p><p>The ratios of rolling and sliding of HH were computed from the MR imaging and video camera data obtained. …

    Congress of the Japanese Physical Therapy Association 2016(0), 0043, 2017

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  • A case of masticator space abscess which caused trismus and bilateral posterior open bite with difficulty in distinguishing from temporomandibular joint diseases  [in Japanese]

    KUBO Hirohito , WATANABE Masahiro , DATEOKA Suguru , OHNISHI Yuichi , KAKUDO Kenji , MOTOHASHI Tomokazu , SUGITATSU Mitsuchika

    <p>患者は71歳の女性で,10日前の感染根管治療後から開口障害が生じ,右側顎関節部疼痛および咬合異常を主訴として来院した。初診時の自力最大開口距離は25 mmで,開口時の関節雑音は認められなかった。また,両側性の臼歯部開咬が認められたが,口腔内外に明らかな炎症所見を認めなかった。顎関節症以外の顎関節疾患を疑ったが,2日後のMRI検査で右側関節突起の内側に膿瘍形成を疑わせる所見が認めら …

    Journal of the Japanese Society for the Temporomandibular Joint 28(2), 144-150, 2016

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  • A Japanese, Multicenter, Open-label, Phase 3 Study to Investigate the Safety and Efficacy of Gadobutrol for Contrast-enhanced MR Imaging of the Central Nervous System

    TANAKA Akio , MASUMOTO Tomohiko , YAMADA Haruyasu , KURAUCHI Masayo , BREUER Josy

    … Purpose: Gadobutrol 1.0 M is macrocyclic gadolinium-based contrast agent for magnetic resonance imaging (MRI). … This multicenter, open-label, phase 3 study aimed to investigate the efficacy and safety of gadobutrol-enhanced versus unenhanced MRI in the visualization and diagnosis of central nervous system (CNS) lesions in Japanese patients.<br>Methods: A total of 223 patients referred for contrast-enhanced MRI of the CNS underwent unenhanced and gadobutrol-enhanced (0.1 mmol/kg body weight) MRI. …

    Magnetic Resonance in Medical Sciences 15(2), 227-236, 2016

    IR  J-STAGE  Ichushi Web 

  • Magnetic resonance imaging to investigate urinary incontinence in women  [in Japanese]

    Morikawa Shigehiro , Ninomiya Sanae , Naito Kiyoko , Okayama Hisayo

    … 優れるが,骨盤底の詳細な評価には,会陰部や腔内プローブからの観察が必要となることもある.MR画像は,X線被曝もなく,高い軟部組織コントラストで骨盤底全体の詳細な解剖学的情報を非侵襲的に観察でき,腹圧負荷や骨盤底筋群の収縮時の変化を捉えることも可能である.特に縦型オープンMR装置では,座位で重力のかかった状態をモニターできるので,尿失禁研究において有効な手段とな …

    Journal of Nursing Science and Engineering 2(3), 124-132, 2015

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  • A Case of the Internal Carotid Artery–Posterior Communicating Artery Aneurysm Mimicking Tolosa–Hunt Syndrome

    Shiode Taketo , Oya Soichi , Matsui Toru

    … Because a plain head computed tomography (CT) scan obtained on her initial visit showed no abnormal findings, such as subarachnoid hemorrhage or a giant cavernous aneurysm, her condition was provisionally diagnosed as Tolosa–Hunt syndrome and elective magnetic resonance (MR) imaging was scheduled. …

    NMC Case Report Journal 2(1), 1-3, 2015

    J-STAGE 

  • MR imaging-based thickness analysis of the growth plate in the femoral distal end  [in Japanese]

    TANAKA Shota , HAYASHI Toyohiko , WATANABE Satoshi , KOGA Yoshio , OMORI Go

    … 板形状の軟骨組織で,骨を成長させる機能をもつ.そのため,その損傷は骨成長を阻害することになる.そこで成長軟骨の形態について,解剖学的・組織学的に研究が行われてきた.しかし従来,成長軟骨は開いた曲面のサーフェスモデルで表現されており, 3次元的には表現されていなかった.その理由は, MR画像上では成長軟骨の骨幹側の境界が不明確であるためである.そこで本研究では,成長軟骨の厚さの定量評価を目的とした. …

    IEICE technical report. ME and bio cybernetics 114(79), 57-62, 2014-06-13

    Ichushi Web 

  • Apparent Diffusion Coefficient Mapping Using a Multi-Shot Spiral MRI Sequence of the Rat Brain

    Numano Tomokazu , Koji Hyodo , Naotaka Nitta , Junichi Hata , Nobuaki Iwasaki , Kazuhiro Homma

    … Purpose: Commonly used diffusion weighted (DW) imaging such as DW spin echo (SE) type echo planar imaging (DW-SE-EPI) is known to be a snapshot-like acquisition and to have a relatively high signal-to-noise ratio. … Spiral MRI sequence (SPIRAL) has characteristics similar to these of EPI, but it has rarely been used for diffusion-weighted imaging (DWI). …

    Open Journal of Radiology 4(1), 13-24, 2014-03

    IR 

  • Relationships between voluntary contraction of the pelvic floor muscles and factors responsible for pelvic relaxation using magnetic resonance images in a sitting posture  [in Japanese]

    Ninomiya Sanae , Saito Izumi , Naito Kiyoko , Tsuchikawa Sachi , Saito Yoshino , Okayama Hisayo

    骨盤底筋訓練の不適応となる要因を明らかにすることを目的として,骨盤底筋群の随意収縮の可否とその影響要因を検討した。19〜74歳の一般女性152名を対象として骨盤内矢状断面をオープン核磁気共鳴画像装置で撮像し,骨盤底筋収縮による膀胱頸部の拳上量から収縮の可否を判定した。また,収縮の可否と骨盤底機能への影響要因(分娩,年齢,BMI,尿失禁症状)との関連性を評価した。結果,収縮ができない女性(拳上量&l …

    Maternal health 54(4), 571-579, 2014-01

    Ichushi Web 

  • Improved Reliability in Skeletal Age Assessment using a Pediatric Hand MR Scanner with a 0.3T Permanent Magnet

    TERADA Yasuhiko , KONO Saki , UCHIUMI Tomomi , KOSE Katsumi , MIYAGI Ryo , YAMABE Eiko , FUJINAGA Yasunari , YOSHIOKA Hiroshi

    … The purpose of this study was to improve the reliability and validity of skeletal age assessment using an open and compact pediatric hand magnetic resonance (MR) imaging scanner. …

    Magnetic Resonance in Medical Sciences 13(3), 215-219, 2014

    J-STAGE  Ichushi Web 

  • Clinical Application of Navigation Surgery Assisted by the Computational Anatomy  [in Japanese]

    TOMIKAWA Morimasa , HASHIZUME Makoto

    … 超音波による同定が困難な乳癌2例に対し,Open MRI治療室にてリアルタイム三次元ヴァーチャルリアリティ・ナビゲーションシステムによる乳腺切除術を施行した.ナビゲーションにより穿刺時の病変と針の位置がリアルタイムに可視化され,マーキングを正確に行うことができた.また,手術時の体位かつ気腹後の状態,すなわち腹腔鏡下手術中の状態でMR画像を取得し,オーグメンティッドリアリ …

    Medical Imaging Technology 31(5), 311-316, 2013

    J-STAGE  Ichushi Web 

  • Usefulness of Dual Echo Volumetric Isotropic Turbo Spin Echo Acquisition (VISTA) in MR Imaging of the Temporomandibular Joint

    SUGIMORI Yuko , TANAKA Shigeko , NISHIMURA Tetsuya , YAMAMOTO Akira , OHFUJI Satoko , NAITO Yukari , KATSUMATA Yasutomo , MIKI Yukio

    … The ratio of contrast (CR) of adipose tissue by the articular disk to that of the articular disk itself was significantly higher in DE-VISTA-AFI than DE-VISTA-PDWI (<i>P</i><0.05) in patients and volunteers with closed or open mouth. …

    Magnetic Resonance in Medical Sciences 12(4), 249-259, 2013

    J-STAGE  Ichushi Web 

  • A case of recurrent synovial osteochondromatosis of the temporomandibular joint after arthroscopic surgery  [in Japanese]

    KATAYAMA Akie , KAWAKAMI Tetsuji , FUJITA Hirohito , MATSUDA Shuji , NOTSU Kazuki , KIRITA Tadaaki , OBARA Seiji

    … CT画像にて左側下顎頭周囲に不透過物を,MRのT1強調画像にて低信号の腫瘤状構造物を認めた。 …

    Journal of the Japanese Society for the Temporomandibular Joint 24(3), 181-185, 2012-12-20

    J-STAGE  Ichushi Web  References (9)

  • Serious Adverse Effects of Gamma Knife Radiosurgery for Mesial Temporal Lobe Epilepsy

    KAWAMURA Tetsuro , ONISHI Hiroaki , KOHDA Yukihiko , HIROSE Genjiro

    … Both patients requested open surgery and became seizure-free postoperatively. … Magnetic resonance (MR) imaging showed a large cyst in the irradiated temporal lobe. … However, MR imaging revealed abnormal enhancement, cyst formation, and diffuse white matter change in the irradiated temporal lobe 9 years after GKRS. …

    Neurologia medico-chirurgica 52(12), 892-898, 2012-12-15

    J-STAGE  Ichushi Web  References (38)

  • Physical Property and Position Dependence of Low-field MR Imaging with Temporomandibular Joint Coil  [in Japanese]

    Innami Hisashi , Ozawa Tomonori , Shinohara Yuki , Otaka Yusei , Suzuki Yu , Sezaki Yusuke , Takahashi Nobutoshi , Okumura Yasuhiro

    … In this study we attempted to find the optimal settings for imaging the temporomandibular joint (TMJ) using open-type MRI with a TMJ coil.<br><b>Methods:</b> … We took images using 0.2T open MRI and a TMJ coil with a phantom made of vegetable oil and distilled water. …

    Shika Hoshasen 52(3), 35-43, 2012

    J-STAGE 

  • Recurrent Cerebral Infarctions caused by Intravascular Lymphoma Diagnosed by Brain Biopsy : A Case Report  [in Japanese]

    Aoyama Tatsuro , Sekiguchi Yasuyuki , Yako Takehiro , Sakai Keiichi , Hongo Kazuhiro , Tojo Kana , Ikeda Shuichi , Nakayama Jun , Uehara Tsuyoshi

    繰り返す脳梗塞で発症し,開頭生検によって確定診断をしえた症例を報告する.症例は58歳の男性,失語症状で発症,その後も左不全麻痺や痙攣発作を繰り返し,MRIで多発性脳梗塞を認めた.LDHおよびsIL-2Rの上昇を認め,血管内リンパ腫を疑い,皮膚・骨髄・筋生検を行ったが診断には至らず,発症から6ヵ月後に開頭生検を行い,血管内リンパ腫の確定診断が得られた.術後R-CHOP療法を開始したが,術後1ヵ月で死 …

    Japanese Journal of Neurosurgery 21(4), 342-347, 2012

    J-STAGE  Ichushi Web  References (13)

  • The orientation of orthopaedic metallic devices relative to the frequency-encoding gradient affects susceptibility artifacts: an experiment using open MR imaging

    竹内 直英 , 光安 廣倫 , 仲西 知憲 [他] , 西村 須磨子 , 下戸 健 , 日垣 秀彦 , 橋爪 誠 , 岩本 幸英

    … 対象と方法 : 2種類の大腿骨近位部骨折用の髄内釘(ステンレス製, チタン製)をゲルファントム内に固定した後に, 0.4 Tesla open MRI(APERTO : 日立メディコ社製)を用いて撮影した. … また, Open MRI は体位を自由に変えることができるため, 磁化率アーチファクトを最小にする至適な位置を得ることが可能であることが示唆された. …

    Fukuoka acta medica 102(5), 185-194, 2011-05-25

    IR  DOI 

  • A three-dimensional analysis of clavicular movement using Open-MR imaging and 3D/3D-registration  [in Japanese]

    YONEYA Naoki , TANAKA Hiroshi , HAYASHI Toyohiko , MAEDA Yoshinobu , WATANABE Tetsuya , NAKAMURA Yasuo , NINOMIYA Hiroki , KOMAI Masahiko , NOBUHARA Katsuya

    … 人の肩関節の運動メカニズムを解明するために,我々はOpen-MR 装置と3D/3D-registration を用いて,生体内の肩運動,特に肩甲骨面内の上腕挙上運動を準静的に解析してきた.本論文では,この手法を鎖骨運動の解析に応用した.本解析では,再現性の高い基準座標系が必要となる.そのために,画像上で比較的明瞭な肋骨と胸骨の接合部に着目し,6 つの肋骨先端点を手動で抽出した,その6 点を用いて …

    Journal of the Society of Biomechanisms 35(2), 123-129, 2011-05-01

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