著者

中村 亮一 北角 権太郎 長村 伸一 田辺 良子 須藤 政光 勝池 康允 望月 剛 千葉 敏雄

出版者

一般社団法人 日本コンピュータ外科学会

雑誌

日本コンピュータ外科学会誌 (ISSN:13449486)

巻号頁・発行日

vol.13, no.2, pp.87-95, 2011 (Released:2015-10-30)

参考文献数

10

被引用文献数

2 3

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The advancement of measurement technology inside operation room including medical imaging and diagnosis and the combination between these technologies and computer technology leads the progress of navigation surgery, which is safer and more precise surgery; this type of a surgical procedure is mainly applicable to neurosurgery, orthopedic surgery, and otolaryngologic surgery. For example, fetal endoscopy can be safely performed through a surgical procedure based on the navigation technology; this procedure enhances the surgeon's field of view. However, a real-time and high-quality imagining and visualization technology is required to perform surgeries involving the treatment of soft tissue, such as fetal surgery. In our work, we developed a real-time updated navigation system for performing abdominal endoscopy including fetal surgery, using a high-speed transfer interface of a real-time 3D ultrasound imaging system and by carrying out high-speed computing using a multi-core processor system. The evaluation results of our system showed that our system was able to detect a position error of up to approximately 2.78 mm, and it was able to visualize and process data after every 200-500 ms. Further, we developed a new method for sensing the distance between the organs and surgical instruments. The evaluation results of our navigation system show that our system is able to avoid collision between the organs and surgical instruments during endoscopic procedures.

著者

丸山 純一 桶 隆太郎 村社 智宏 石井 正宏 檜山 郁夫 加藤 剛久 梅澤 康昭 佐藤 達弥 高橋 通 山下 紘正 谷岡 健吉 千葉 敏雄

出版者

一般社団法人 映像情報メディア学会

雑誌

映像情報メディア学会誌 (ISSN:13426907)

巻号頁・発行日

vol.72, no.10, pp.J136-J141, 2018 (Released:2018-09-26)

参考文献数

7

被引用文献数

1 1

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3D偏光フィルタ方式を採用した8K-3D IPS液晶ディスプレイを開発した.近年,医療分野では,カメラとディスプレイにより医師の目をサポートする技術の開発が進んでいる.今回われわれは,立体視による奥行感の把握が可能な,内視鏡/顕微鏡手術向け「3D対応8K手術システム」の実現を目的に,3D偏光フィルタ方式8K-3D液晶ディスプレイの開発に取り組んだ.55インチ8K IPS液晶パネルの採用により,高精細,高画質な立体視を可能とした.手術室のレイアウトを考慮し,視距離1.0~1.5 mの範囲で使用することを目標に3D偏光フィルタを設計した結果,3D視野角8.6゜の範囲で3Dクロストークのない立体視を可能とした.本論文では,同ディスプレイの開発におけるポイントについて報告する.

著者

トゥア ナモラ ナインゴラン 廖 洪恩 佐久間 一郎 千葉 敏雄

雑誌

Journal of Japan Society of Computer Aided Surgery : J.JSCAS (ISSN:13449486)

巻号頁・発行日

vol.8, no.3, pp.306-307, 2006-12-30

著者

ナインゴラン トゥア ナモラ 貞島 亮介 廖 洪恩 小林 英津子 神保 泰彦 佐久間 一郎 千葉 敏雄

出版者

一般社団法人日本機械学会

雑誌

ロボティクス・メカトロニクス講演会講演概要集

巻号頁・発行日

vol.2006, pp."2A1-A05(1)"-"2A1-A05(4)", 2006

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In the present treatment system of Twin-To-Twin Transfusion Syndrome, surgeon uses visual measurement of endoscope image in doing the identification of anastomotic vessel, before taking decisions to do some treatments on suspected vessel. Given this factor, we proposed a navigation system that may lead the surgeon to find targets for treatment quantitatively, to improve the treatment's safety and accuracy. For the first step in developing the system, we proposed a vascular mapping system to make an overall view of placenta. We developed a software application to make corrections on the image distortion of 2D-picture that is taken from endoscope, and do images combine to get the overall map of the diagnosed target. The effectiveness of the application was verified experimentally, which were conducted by considering the motion range of endoscope.

著者

出町 文 重原 伸彦 江田 廉 澤口 冬威 望月 剛 桝田 晃司 宮本 義孝 千葉 敏雄

出版者

公益社団法人 日本生体医工学会

雑誌

生体医工学 (ISSN:1347443X)

巻号頁・発行日

vol.51, no.6, pp.374-383, 2013-12-10 (Released:2014-03-28)

参考文献数

20

被引用文献数

2

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We have previously reported our attempts for active control of microbubble aggregations, by making use of Bjerknes force, which acts to propel microbubbles and to adjust the size of aggregations. However, because we have used simple shape of artificial blood vessels, the behavior of aggregations in a capillary, e.g., probability to obstruct in bloodstream, possibility of embolization, has not been predicted. Thus we measured the sticked area of produced aggregation on a wall of artificial blood vessel before evaluating the volume flown to downstream. First we prepared the straight path model of artificial blood vessel with the diameter of 2 mm to produce aggregation by emitting ultrasound against flow, which conditions were with 5 MHz and 300-500 kPa-pp. The size of aggregation increased according to the sound pressure, whereas there would be an optimal flow velocity and suspension density to obtain maximum trapped performance. The flat rate of aggregation showed that sound pressure works to compress the shape of aggregation rather than the effect of flow velocity. Then we derived the conditions to obtain a desired volume of aggregation to apply to the multi-bifurcation model of artificial blood vessel, which has repeatedly divided paths until the middle of the model from the inflow path of 2 mm to the minimum diameter of 0.5 mm, to confirm the behavior of an aggregation. Using the flow velocity of 20 mm/s, maximum sound pressure of 300 kPa, and suspension density of 0.08 μl/ml, the volume of aggregation was expected to be 0.6 mm3, which is greater than the section area of the narrow path in the bifurcation model. The result showed that the aggregation, in 50 s after the injection of the suspension, flaked off the vessel wall, flew to downstream, and was caught at a bifurcation. Finally we clearly confirmed that the aggregation blocked a path, where colored water could not penetrate to downstream.