Search Results 1-20 of 86

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  • The Utility of a 3D Endoscope and Robot-Assisted System for MIDCAB

    Endo Yuki , Nakamura Yoshitsugu , Kuroda Miho , Ito Yujiro , Hori Takaki

    … We reviewed the midterm results of MIDCAB with a three-dimensional (3D) endoscope in our institution.</p><p>Methods: Of the 359 patients who underwent off-pump coronary artery bypass grafting (CABG) from December 2013 to March 2017, 54 had MIDCAB with the left internal thoracic artery (LITA) to left anterior descending (LAD) artery through a small left thoracotomy with a 3D endoscope. …

    Annals of Thoracic and Cardiovascular Surgery 25(4), 200-204, 2019

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  • Localization Method Using Received Signal Strength for Wireless Power Transmission of the Capsule Endoscope

    HIYOSHI Daijiro , TAKAHASHI Masaharu

    … Wireless power transmission of the capsule endoscope has been researched now, and the power transmission efficiency can be improved by knowing the capsule location. … Therefore, a simple algorithm for using received signal strength (RSS) has been developed so that position estimation can be performed in real time, and the performance is evaluated by performing three-dimensional localization with eight receiving antennas.</p> …

    IEICE Transactions on Communications E102.B(8), 1660-1667, 2019

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  • Three Dimensional Motion Analysis of Hand Tremors During Endoscopic Ear Surgery

    Fujii Taihei , Kunimoto Yasuomi , Kisaka Tomohiko , Gupta Shivani , Yazama Hiroaki , Kuya Junko , Fujiwara Kazunori , Takeuchi Hiromi

    … During ear endoscopic surgery, a surgeon has to hold an endoscope with one hand and operate the surgical instruments with another hand. … There are few techniques which are used during surgery to stabilize the endoscope. …

    Yonago Acta Medica 62(1), 109-114, 2019

    IR  J-STAGE 

  • High-accuracy endoscopic microscopy using a thin, 1.5 mm diameter probe with optical coherence tomography

    FURUKAWA Hiromitsu , NOGUCHI Naomi , YAMAZAKI Hiroshi , ASADA Takafumi

    20 nmの精度で内部を非接触で計測可能な直径1.5 mmの内視鏡型の顕微鏡を製作した。眼科等で生体計測に利用される光干渉断層法(OCT: Optical Coherence Tomography)の光源を高安定化し、工業用に精度を高めた。プローブ直径が1.5 mm以下で、内蔵された微小径モーター2個により軸方向スキャニングと回転方向スキャニングとを行い、試料内筒に挿入することで、内側を全周計測す …

    Synthesiology English edition 11(1), 24-33, 2018

    J-STAGE 

  • Derivation of a Virtual Laser Spot Point Using a 3D Measuring Device and a Stereo Endoscope  [in Japanese]

    KATSUMATA SHINSUKE , IWAMOTO NORIYASU , KAWAI TOSHIKAZU , SUZUKI HISASHI , KATAI HITOSHI , NISHIKAWA ATSUSHI

    <p>近年,マスタ・スレーブ型手術支援ロボットを用いて内視鏡手術を行うシステムが普及している.このシステムは,長時間にわたる内視鏡手術において医師が楽な姿勢で作業することが可能なため,疲労による医療ミスを防ぐことが期待できる.しかしその一方で,ロボットを扱うための特殊な訓練や操作に関する豊富な知識が必要であり,医師の負担が大きいという問題がある.この問題を解決するために,タッチパネルを …

    Transactions of Japanese Society for Medical and Biological Engineering Annual56(Abstract), S377-S377, 2018

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  • Real-time Endoscopic Image Overlay of the Tip of Surgical Instruments for Control of a Forceps Robot  [in Japanese]

    KUMAOU SHOUGO , IWAMOTO NORIYASU , KAWAI TOSHIKAZU , SUZUKI HISASHI , KATAI HITOSHI , NISHIKAWA ATSUSHI

    <p>現在,内視鏡手術においてマスタ・スレーブ方式のロボットを用いたロボット手術が普及しており,手振れの抑制や自由自在な操作が行えるため普段以上の能力を発揮することが可能となっている.しかし,操作を習得するためには特殊な訓練や経験が求められており執刀医の負担が増大している.手術器具を把持したスレーブロボットが自律的に臓器への位置決めといった術中タスクを行うことが出来ればこの問題は解決で …

    Transactions of Japanese Society for Medical and Biological Engineering Annual56(Abstract), S173-S173, 2018

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  • Three-Dimensional Spiral Wave Reentry with I-Shaped Type Filament in Ventricular Septum  [in Japanese]

    KAWASHIMA KEITARO , YATABE JUNYA , SHIBATA NITARO , YAMAZAKI MASATOSHI , HONJO HARUO , ARAFUNE TATSUHIKO

    <p> 心室頻拍や心室細動の成因は,渦巻き状の興奮波が異常に旋回し続けるスパイラルリエントリ(Spiral Wave Reentry :SWR)である.近年,ヒツジ摘出心の左心房内に内視鏡を挿入し,左心房の活動電位光学シグナルを2台の高速カメラを用いた光学計測法にて,心内膜と心外膜を同時計測した研究が報告されている.その結果,SWRの旋回中心であるI型フィラメントは,心筋壁厚が急激に変 …

    Transactions of Japanese Society for Medical and Biological Engineering Annual56(Abstract), S111-S111, 2018

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  • Mesenteroaxial gastric volvulus validly diagnosed by computed tomography  [in Japanese]

    Moriyama Tomoaki , Ban Takushiro , Kato Ichiro , Ito Takashi , Nagasu Naoko

    … The CT scan is valid to diagnose gastric volvulus because of capability of building three-dimensional images. … Endoscopic reduction utilizing a longer endoscope is a good choice for the adult-onset volvulus.</p> …

    Progress of Digestive Endoscopy 92(1), 94-95, 2018

    J-STAGE  Ichushi Web 

  • Study of stereo camera unit for rigid endoscope enabling low-cost three-dimensional image acquisition  [in Japanese]

    森下 康徳 , 福井 智也 , 高木 康博

    映像情報メディア学会技術報告 = ITE technical report 41(8), 1-3, 2017-03

  • Endoscope-Assisted Transoral Reduction and Internal Fixation of a Mandibular Subcondylar Fracture with a 3D - Shaped Plate

    Ibaragi Soichiro , Yoshioka Norie , Kishimoto Koji , Sasaki Akira

    Endoscope-assisted procedures have solved these problems, however the anatomical adaptation of osteosynthesis plates to the fractured area is difficult in the limited surgical field. … Three-dimensional pre-shaped plates specialized for subcondylar fractures recently became available. … They are originally not for endoscope-assisted procedures but it may be useful for endoscopic approach because they are very small and pre-shaped. …

    International Journal of Contemporary Medical Research 4(2), 574-576, 2017-02

    IR 

  • High-accuracy endoscopic microscopy using a thin,1.5 mm diameter probe with optical coherence tomography:— Disturbance of the sea floor by huge earthquakes and their related tsunamis, and the use of disturbance records in marine sediments for the history of past huge earthquakes and tsunamis —  [in Japanese]

    FURUKAWA Hiromitsu , NOGUCHI Naomi , YAMAZAKI Hiroshi , ASADA Takafumi

    20 nmの精度で内部を非接触で計測可能な直径1.5 mmの内視鏡型の顕微鏡を製作した。眼科等で生体計測に利用される光干渉断層法(OCT: Optical Coherence Tomography)の光源を高安定化し、工業用に精度を高めた。プローブ直径が1.5 mm以下で、内蔵された微小径モーター2個により軸方向スキャニングと回転方向スキャニングとを行い、試料内筒に挿入することで、内側を全周計測す …

    Synthesiology 11(1), 23-32, 2017

    J-STAGE 

  • Two Cases of Foreign Bodies in the Hypopharynx and Esophagus Removed by Transcervical Approach

    Kaneko Isao , Muroi Masahiko , Arai Yayoi , Chikamatsu Kazuaki

    … Although the endoscopist could visualize the foreign body and tried to remove it with the flexible endoscope, the ingested foreign body failed to come within the grasp of the endoscopic forceps. … The fish bone could not be visualized by endoscopic examination, but was clearly detected by three-dimensional-CT imaging. … Recently, in most cases, foreign bodies in the hypopharynx and esophagus have been removed using a flexible endoscope. …

    Practica oto-rhino-laryngologica. Suppl. 151(0), 58-59, 2017

    J-STAGE 

  • Technology of Encapsulating 3-dimentional Liquid Metal Electrode with Multi Layers  [in Japanese]

    NAGATOMO Tatsuho , MIKI Norihisa

    … Our previous device was verified to work as a force sensor while it was 10 mm in diameter and way too big to be mounted onto an endoscope. … In this work, we developed technology of encapsulating 3-dimentional Liquid metal electrode with multi layers to develop a miniaturized sensor that is small enough to be mounted onto an endoscope. … 3 polydimethyl siloxane layers with microfluidic channels were assembled and liquid metal was pouring to form three-dimensional electrodes. …

    The Proceedings of JSME annual Conference on Robotics and Mechatronics (Robomec) 2017(0), 1A1-L09, 2017

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  • Generating method for unfolded views of the digestive tract using 3D endoscope  [in Japanese]

    Yoshimoto Kayo , Watabe Kenji , Takahashi Hideya , Yamada Kenji

    <p>内視鏡は視野が狭く、一度に消化管全体の情報を得ることができない。そのため、複数の腫瘍があった場合に位置関係を把握するのが難しい。CTを用いた仮想内視鏡により凹凸のある腫瘍の位置関係を把握することはできるが、仮想内視鏡では早期がんなどを含む凹凸の無い腫瘍を把握することはできない。そこで、立体内視鏡を用いて得られたステレオ画像から消化管を展開した画像を作成する手法を提案する。ステレオ …

    Transactions of Japanese Society for Medical and Biological Engineering 55Annual(4PM-Abstract), 345-345, 2017

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  • Two Cases of Foreign Bodies in the Hypopharynx and Esophagus Removed by Transcervical Approach  [in Japanese]

    Kaneko Isao , Muroi Masahiko , Arai Yayoi , Chikamatsu Kazuaki

    … Although the endoscopist could visualize the foreign body and tried to remove it with the flexible endoscope, the ingested foreign body failed to come within the grasp of the endoscopic forceps. … The fish bone could not be visualized by endoscopic examination, but was clearly detected by three-dimensional-CT imaging. … Recently, in most cases, foreign bodies in the hypopharynx and esophagus have been removed using a flexible endoscope. …

    Practica Oto-Rhino-Laryngologica 110(3), 181-186, 2017

    J-STAGE  Ichushi Web 

  • Progress in Auditory Research and an Introduction to Endoscopic Ear Surgery  [in Japanese]

    枝松 秀雄

    最終講義

    東邦医学会雑誌 = Journal of Medical Society of Toho University 63(1), 20-24, 2016-03

    IR  DOI  Ichushi Web 

  • Re-analysis and evaluation from the appreciator viewpoint to the three-dimensional image-From the topics about the three-dimensional image with no parallax-  [in Japanese]

    KUWAYAMA Tetsuro

    今日,3D映像技術は高速度で変化し,多方面に発展している.その中でも,ハーフミラー合成,半透明スクリーンへの映写などの,視差を含まない映像を用いる3D像表示手法が目立っている.本報告では,視差を持たない映像を用いて3D像表示を行う技術の全体像を見直し,作り手ではなく鑑賞者の視点が重要なことを指摘する.また,3D映像技術を巡って発生している混乱を指摘し,今後の発展に向けた提言を行う.

    ITE Technical Report 40.29(0), 1-4, 2016

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  • Underwater 3D Imaging Using a Fiber-Based Endoscopic System for Arthroscopic Surgery

    Long Zhongjie , Nagamune Kouki

    … However, conventional endoscope-based arthroscopic surgery does not provide stereoscopic information to the surgeon. … To overcome this limitation, we have developed a modified endoscopic system that uses an optical fiber (1 mm diameter) for three-dimensional imaging of knee joints. … A prism is used to decrease the length and diameter of baseline and endoscope tube, respectively. …

    Journal of Advanced Computational Intelligence and Intelligent Informatics 20(3), 448-454, 2016

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  • AVAILABILITY OF A HEAD-MOUNTED DISPLAY SYSTEM IN ENDOSCOPIC SKULL BASE SURGERY  [in Japanese]

    Kobayashi Masayoshi , Hatazaki Seiji

    … An endoscopic view usually provides us two-dimensional (2D) imagery while a three-dimensional (3D) image is ideal for performing surgical manipulation on the skull base as with most surgical microscopes. … As an advantage, a head-mounted monitor provides the sensation of immersion into the surgical field and a pseudo-3D effect to both surgeon and endoscope-holding assistant, especially while an endoscope is being moved. …

    JIBI INKOKA TEMBO 59(6), 324-328, 2016

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  • The Technique of Adult Atrial Septum Defect Closure Supported by Minimally Invasive Cardiac Surgery (MICS) and Three Dimensional Endoscopy  [in Japanese]

    Toyoda Yasuyuki , Nakao Mitsutaka , Takemura Takahiro , Shiratori Kazuaki , Tsuda Yasutoshi , Hama Gentaku , Niitsu Hirokazu , Kawai Yujiro , Kinami Hiroo , Yokoyama Takahito

    <p>当院では僧帽弁形成術,冠動脈バイパス術を中心に2012年3月より手術侵襲軽減,より良好な術野確保目的にハイビジョン3D内視鏡装置(HD101S 30°斜視,HD-101D直視,有限会社新興光器製作所,東京)を用いたMICS(minimally invasive cardiac surgery)法を積極的に導入してきた.その経験を踏まえASD(Atrial Septal Defec …

    Japanese Journal of Cardiovascular Surgery 45(4), 166-169, 2016

    J-STAGE  Ichushi Web 

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