著者

篠原 一彦

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.15, no.4, pp.323-327, 2014-02-28 (Released:2014-03-31)

参考文献数

12

被引用文献数

3

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Japan is an oceanic and archipelagic state and all big cities are located near the sea shore line. So importance of hospital ship and disaster relief ship had been pointed in Japan. After the Great East Japan Earthquake in March 2011, usefulness and needs for hospital ship were strongly proposed again. There exist many application fields of computer aided surgery for medical and humanitarian support activities in the hospital ship. Outlines and problems of hospital ship are presented in this paper.

著者

片岡 弘之 正宗 賢 佐久間 一郎 土肥 健純

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.1, no.1, pp.30-38, 1999-03-31 (Released:2011-01-25)

参考文献数

12

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Neurosurgical navigation systems using preoperative images have a big problem in their accuracy which is caused byBrain Shift. To this problem we have developed an image modification technique using brain mechanics. In this study a method is introduced in which the intraoperative brain shape is estimated through Finite Element Method. In the process the nearest model shape to intraoperative brain surface is firstly estimated by modifying an FEM result through adjusting mechanical property, then the residual between the result and the actual shape is obtained by a virtual load on the brain surface.The accuracy of our method is evaluated with phantom experiments.We prepare two kinds of phantom experiments for investigating the most adaptive conditions in terms with bindings, initial model parameters, etc. One is that using mathematical model whose mechanical property is elastic, and the other is that using soy bean curd whoes mechanical property is non-linear.

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

三澤 将史

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.23, no.3, pp.110-112, 2021 (Released:2021-08-28)

参考文献数

13

著者

森 健策 村垣 善浩

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.20, no.1, pp.5-21, 2018 (Released:2018-08-08)

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日本コンピュータ外科学会は2017年で設立25周年を迎えました. 2017年10月28日から30日に名古屋大学豊田講堂で開催された, 第26回日本コンピュータ外科学会では多数の参加者をお迎えし, 25周年特別企画が行われました.本学会の設立ならびにその発展に多大なる貢献をなされた先生方にご挨拶いただき, その後, 東京大学佐久間一郎先生から, 日本コンピュータ外科学会これまで何が研究され, そして, それが今後どうなっていくであろうかを予想する基調講演をいただきました. そして, 医学, 工学, 情報の各分野の若手を含めた研究者によるパネルディスカッションの時間が持たれました. このディスカッションでは, 日本コンピュータ外科学会のこれまでの25年, これからの25年について議論をするものでした. 日本コンピュータ外科学会がこの25年で達成してきたことを振り返り, 若手研究者が次の25年で目指すべき将来像についてそれぞれの立場から述べ, 今後どのようなイノベーションが生まれるかを予測する絶好の機会となったものと思います.本記事は, 第26回日本コンピュータ外科学会における 「25周年特別企画」 での, 橋爪誠先生, 北島雅樹先生, 土肥健純先生からのご挨拶, 佐久間先生の基調講演, ならびにパネルディスカッションを書き起こしたものです. 本学会を今後どのように発展させればよいのか, ひとつの道しるべとなれば幸いです.

著者

小池 康博

出版者

一般社団法人 日本コンピュータ外科学会

雑誌

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

巻号頁・発行日

vol.13, no.3, pp.150-151, 2011-11-22

参考文献数

1

著者

増谷 佳孝

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.4, no.1, pp.5-12, 2002-06-30 (Released:2011-01-25)

参考文献数

15

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In the last 10 years, diffusion in biological tissues is increasingly studied by using magnetic resonance imaging techniques. More recently, diffusion tensor imaging is attracting the biomedical researchers for its application in depiction of fiber tracts based on diffusion anisotropy. For example, information of white matter tracts depicted by diffusion tensor analysis helps neuro-surgical navigation as well as vascular information. In this review paper, determination process of diffusion tensor in multi-channel magnetic resonance data, and several visualization techniques, such as tractography, are described briefly, and then several examples are shown using clinical data. The basic concepts of diffusion tensor analysis, and advantages and disadvantages of the visualization techniques are also discussed.

著者

山本 聡 牧野 雄一 清水 太一 川本 祥太郎 小野木 真哉 桝田 晃司

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.23, no.1, pp.15-22, 2021 (Released:2021-02-04)

参考文献数

22

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The purpose of this study is to develop a support software to place ultrasound transducer, which produces local acoustic radiation force, for active induction of a micro object, representing a thin catheter, through blood vessel network. First, based on the image analysis of 3D blood vessel network, which was obtained using echography, the system calculates the possible area of the ultrasound transducer to be able to induce a micro object to desired path in blood vessel network. Meanwhile, due to the shape of body surface and the position of the ribs, which was obtained by an optical position sensor, the common area with the body surface was derived. Then, considering the position and the movable area of the robot, which grasps and moves the ultrasound transducer, the system indicates the candidate commands for the robot. To verify the system performance, we have conducted a simulation for active induction experiment of thin catheter through blood vessel network of a normal volunteer subject. As the result, we confirmed the variation of the thin catheter induction according to both body posture and breathing condition.

著者

中村 亮一 正宗 賢

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.18, no.3, pp.139-142, 2016 (Released:2016-10-06)

参考文献数

33

被引用文献数

1

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.3, pp.164-172, 2011

著者

安達 和彦 東 洋平 藤田 敦史 甲村 英二

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.12, no.1, pp.23-32, 2010 (Released:2015-10-30)

参考文献数

14

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We have developed novel three-dimensional finite element brain model (previously reported whole model) with material property of hyper elastic feature, which successfully demonstrated the intraoperative deformation simulation. However, shortening of computation time was essential for the real-time simulation. In this study, a parametric study to evaluate the difference of constitutive models affects both deformation results and computational time of simulation. Hyper and linear elastic models performed both gravity induced brain shift after fronto-temporal craniotomy and cerebellar hemispheric retraction by spatula for the posterior fossa surgery. The gravity induced brain shift simulation using the linear elastic material model successfully achieved up to 51% reduction of computation time compared with hyper elastic one within acceptable displacement error. Cerebellar retraction simulation also showed acceptable deformation results in both models, while in pressure analysis, an obvious underestimation in liner elastic one. Our results showed the usefulness of linear elastic model in gravity induced simulation for the reduction of computation time. On the other hand, careful attention was needed in the evaluation of pressure analysis by surgical maneuver when using linear elastic model.

著者

小川 健司 富塚 大輔 吉池 美紀 野澤 資亜利 中澤 龍斗 佐藤 陽子 森川 康英 岩本 晃明 大西 公平

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.20, no.1, pp.33-41, 2018 (Released:2018-08-08)

参考文献数

14

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Background and Aims : Non-obstructive azoospermia (NOA) is one of the most serious causes of male infertility. Microdissection testicular sperm extraction (MD-TESE) is a first-line therapy of NOA ; however, sperm retrieval rate from MD-TESE differs substantially between surgeons and is generally insufficient. To develop a new accessible method to identify seminiferous tubules with sperm in real time during MD-TESE, we have made a hypothesis that the hardness of seminiferous tubule wall is available as a quantitative index for the presence of sperm. In this study, as a first step, we determined the stiffness of the testis from an animal model of NOA using a measuring system that we designed.Methods : Male Syrian hamster with bilateral experimental cryptorchidism was used as a NOA model. Stiffness of the testis was evaluated with two different indices of stiffness value : Kj (the stiffness value in a small interval) and K (the mean of Kj values) by using an indentation instrument with a micro force sensor.Results : Hamster testis was confirmed to be valid as a dynamic model for physical measurements by checking the dependency of stiffness and viscosity on the reaction force generated in indentation procedure. Both stiffness values of the testis with cryptorchidism were significantly decreased compared with those of the control testis.Conclusion : The results suggest that our system is useful for quantitative evaluation of testis stiffness. Testis hardness has promise for a new index for spermatogenesis. As the next step, we need this approach to permit measurement for seminiferous tubules.

著者

家入 里志 小幡 聡 神保 教広 宗崎 良太 橋爪 誠

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.17, no.2, pp.67-71, 2015 (Released:2016-04-16)

参考文献数

15

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欧米とほぼ同時期の2000年頃に臨床試験が開始されたロボット手術1), 2) も, わが国においては医療機器に対する薬事法での製造販売承認に時間を要したものの, 2014年12月現在, 200台近いda Vinci®システムが導入され, いよいよ今後の外科系の各領域での普及が期待される. この約15年間で, わが国における低侵襲外科治療は内視鏡外科手術を中心に飛躍的な発展を遂げ, 世界有数の内視鏡外科手術の技術を有する国となっている. このような状況下で, 今後ロボット手術が本邦で普及するにあたっては, ロボット手術のコストに見合う診療報酬を確保できるかという医療制度の問題と, 手術のクオリティを担保する医師の教育・トレーニングが課題となると考えられる. 本稿では, 現在のトレーニングの状況に関して解説する.