研究者紹介システム

石田 駿一
イシダ シュンイチ
大学院工学研究科 機械工学専攻
助教
機械工学関係
Last Updated :2022/06/29

研究者情報

所属

  • 【主配置】

    大学院工学研究科 機械工学専攻
  • 【配置】

    工学部 機械工学科, 未来医工学研究開発センター

学位

  • 博士(医工学), 東北大学
  • 生体流れや磁性流体の計算流体力学

授業科目

研究活動

研究キーワード

  • 計算生体流体力学

研究分野

  • ライフサイエンス / 生体医工学
  • ものづくり技術(機械・電気電子・化学工学) / 流体工学

委員歴

  • 2022年04月 - 現在, 日本機械学会バイオエンジニアリング部門, 次世代戦略委員
  • 2022年, 日本機械学会 第33回バイオフロンティア講演会, 幹事

受賞

  • 2020年06月 第32回バイオエンジニアリング講演会Outstanding Presentation

    石田駿一

  • 2020年04月 日本機械学会, 奨励賞(研究)

    石田駿一

  • 2019年05月 第24回計算工学講演会グラフィクスアワード優秀賞

    石田駿一, 北出宏紀, 伊井仁志, 今井陽介, 和田成生

  • 2019年05月 第24回計算工学講演会グラフィクスアワード特別賞(meshman賞)

    石田駿一, 北出宏紀, 伊井仁志, 今井陽介, 和田成生

  • 2018年12月 第32回数値流体力学シンポジウム ベストCFDグラフィックスアワード最優秀作品賞(動画部門)

    石田駿一

  • 2018年07月 Outstanding Young Researcher Presentation, 8th World Congress of Biomechanics

    石田駿一

  • 2012年06月 第17回計算工学講演会ベストペーパーアワード

論文

  • Naoki Takeishi, Taiki Shigematsu, Ryogo Enosaki, Shunichi Ishida, Satoshi Ii, Shigeo Wada

    Thrombi form a micro-scale fibrin network consisting of an interlinked structure of nanoscale protofibrils, resulting in haemostasis. It is theorized that the mechanical effect of the fibrin clot is caused by the polymeric protofibrils between crosslinks, or to their dynamics on a nanoscale order. Despite a number of studies, however, it is still unknown, how the nanoscale protofibril dynamics affect the formation of the macro-scale fibrin clot and thus its mechanical properties. A mesoscopic framework would be useful to tackle this multi-scale problem, but it has not yet been established. We thus propose a minimal mesoscopic model for protofibrils based on Brownian dynamics, and performed numerical simulations of protofibril aggregation. We also performed stretch tests of polymeric protofibrils to quantify the elasticity of fibrin clots. Our model results successfully captured the conformational properties of aggregated protofibrils, e.g., strain-hardening response. Furthermore, the results suggest that the bending stiffness of individual protofibrils increases to resist extension.

    The Royal Society, 2021年11月, Journal of The Royal Society Interface, 18 (184)

    [査読有り]

    研究論文(学術雑誌)

  • Tomoki Oyama, Shunichi Ishida, Kohei Maeyama, Taimei Miyagawa, Yohsuke Imai

    American Physical Society (APS), 2021年09月, Physical Review Fluids, 6 (9)

    [査読有り]

    研究論文(学術雑誌)

  • Tim Hsu‐Han Wang, Timothy R. Angeli, Shunichi Ishida, Peng Du, Armen Gharibans, Niranchan Paskaranandavadivel, Yohsuke Imai, Taimei Miyagawa, Thomas L. Abell, Gianrico Farrugia, Leo K. Cheng, Gregory O’Grady

    Loss of interstitial cells of Cajal (ICC) has been associated with gastric dysfunction and is also observed during normal aging at ~13% reduction per decade. The impact of ICC loss on gastric slow wave conduction velocity is currently undefined. This study correlated human gastric slow wave velocity with ICC loss and aging. High-resolution gastric slow wave mapping data were screened from a database of 42 patients with severe gastric dysfunction (n = 20) and controls (n = 22). Correlations were performed between corpus slow wave conduction parameters (frequency, velocity, and amplitude) and corpus ICC counts in patients, and with age in controls. Physiological parameters were further integrated into computational models of gastric mixing. Patients: ICC count demonstrated a negative correlation with slow wave velocity in the corpus (i.e., higher velocities with reduced ICC; r2  = .55; p = .03). ICC count did not correlate with extracellular slow wave amplitude (p = .12) or frequency (p = .84). Aging: Age was positively correlated with slow wave velocity in the corpus (range: 25-74 years; r2  = .32; p = .02). Age did not correlate with extracellular slow wave amplitude (p = .40) or frequency (p = .34). Computational simulations demonstrated that the gastric emptying rate would increase at higher slow wave velocities. ICC loss and aging are associated with a higher slow wave velocity. The reason for these relationships is unexplained and merit further investigation. Increased slow wave velocity may modulate gastric emptying higher, although in gastroparesis other pathological factors must dominate to prevent emptying.

    Wiley, 2021年01月, Physiological Reports, 8 (24), e14659, 英語, 国際誌

    [査読有り]

    研究論文(学術雑誌)

  • Shunichi Ishida, Daiki Matsunaga

    American Physical Society (APS), 2020年12月15日, Physical Review Fluids, 5 (12)

    [査読有り]

    研究論文(学術雑誌)

  • Satoshi Ii, Hiroki Kitade, Shunichi Ishida, Yohsuke Imai, Yoshiyuki Watanabe, Shigeo Wada

    The cerebral vasculature has a complex and hierarchical network, ranging from vessels of a few millimeters to superficial cortical vessels with diameters of a few hundred micrometers, and to the microvasculature (arteriole/venule) and capillary beds in the cortex. In standard imaging techniques, it is difficult to segment all vessels in the network, especially in the case of the human brain. This study proposes a hybrid modeling approach that determines these networks by explicitly segmenting the large vessels from medical images and employing a novel vascular generation algorithm. The framework enables vasculatures to be generated at coarse and fine scales for individual arteries and veins with vascular subregions, following the personalized anatomy of the brain and macroscale vasculatures. In this study, the vascular structures of superficial cortical (pial) vessels before they penetrate the cortex are modeled as a mesoscale vasculature. The validity of the present approach is demonstrated through comparisons with partially observed data from existing measurements of the vessel distributions on the brain surface, pathway fractal features, and vascular territories of the major cerebral arteries. Additionally, this validation provides some biological insights: (i) vascular pathways may form to ensure a reasonable supply of blood to the local surface area; (ii) fractal features of vascular pathways are not sensitive to overall and local brain geometries; and (iii) whole pathways connecting the upstream and downstream entire-scale cerebral circulation are highly dependent on the local curvature of the cerebral sulci.

    2020年06月22日, PLoS computational biology, 16 (6), e1007943, 英語, 国際誌

    [査読有り]

    研究論文(学術雑誌)

  • Hiroki Kamada, Hideki Ota, Masanori Nakamura, Yohsuke Imai, Shunichi Ishida, Wenyu Sun, Ko Sakatsume, Ichiro Yoshioka, Yoshikatsu Saiki, Kei Takase

    This study investigated hemodynamic changes in the thoracic aorta and aortic arch branches before and after aortic valve replacement (AVR) by 4D-flow MRI in patients with aortic valve stenosis (AS). Thoracic 4D-flow MRI was performed in 10 AS patients before and after AVR (mean 27 ± 1.9 days). Fifteen aortic planes and 3 aortic arch branches planes were set to evaluate the mean volume flow rate in each plane during a cardiac cycle and the angle between the main flow direction in a specified plane and the axial direction of the aorta. We also focused on the distribution and magnitude of helicity density to evaluate the flow complexity. A significant increase in the volume flow rate after AVR was found in the ascending aorta (before 59.2 ± 8.7 mL/s vs after 77.3 ± 6.2 mL/s, P < 0.05) and the aortic arch branches (before 26.5 ± 2.8 mL/s vs after 35.8 ± 3.3 mL/s, P < 0.001). The flow angle significantly decreased in the ascending aorta (before 39.2 ± 2.7 degree vs after 25.2 ± 1.7°, P < 0.0001) and the arch aorta (before 19.3 ± 2.0 degree vs after 13.4 ± 0.9°, P < 0.001). The volume flow rate in the ascending aorta and the arch branches increased within 1 month after AVR, showing an increased blood supply to the upper body, including to the brain. The postoperative change was accompanied with an increased blood flow in the ascending aorta and a decreased flow complexity proximal to the arch branches.

    2020年, Seminars in thoracic and cardiovascular surgery, 32 (1), 25 - 34, 英語, 国際誌

    [査読有り]

    研究論文(学術雑誌)

  • Shunichi Ishida, Taimei Miyagawa, Gregory O'Grady, Leo K. Cheng, Yohsuke Imai

    Proper coordination of gastric motor functions is required for healthy gastric emptying. However, pyloric function may be impaired by functional disorders or surgical procedures. Here, we show how coordination between pyloric closure and antral contraction affects the emptying of liquid contents. We numerically simulated fluid dynamics using an anatomically realistic gastrointestinal geometry. Peristaltic contractions in the proximal stomach resulted in gastric emptying at a rate of 3-8 ml min-1. When the pylorus was unable to close, the emptying rate increased to 10-30 ml min-1, and instantaneous retrograde flow from the duodenum to the antrum occurred during antral relaxation. Rapid emptying occurred if the pylorus began to open during the terminal antral contraction, and the emptying rate was negative if the pylorus only opened during the antral relaxation phase. Our results showed that impaired coordination between antral contraction and pyloric closure can result in delayed gastric emptying, rapid gastric emptying and bile reflux.

    2019年08月, Journal of the Royal Society Interface, 16 (157), 20190266 - 20190266, 英語, 国際誌

    [査読有り]

    研究論文(学術雑誌)

  • Jun Ohta, Shunichi Ishida, Tetsuaki Kawase, Yukio Katori, Yohsuke Imai

    Common practices to improve the ability to swallow include modifying physical properties of foods and changing the posture of patients. Here, we quantified the effects of the viscosity of a liquid bolus and patient posture on the bolus pathway and pharyngeal residue using a computational fluid dynamics simulation. We developed a computational model of an impaired pharyngeal motion with a low pharyngeal pressure and no pharyngeal adaptation. We varied viscosities from 0.002 to 1 Pa·s and postures from -15° to 30° (from nearly vertical to forward leaning). In the absence of pharyngeal adaptation, a honey-like liquid bolus caused pharyngeal residue, particularly in the case of forward-leaning postures. Although the bolus speed was different among viscosities, the final pathway was only slightly different. The shape, location, and tilting of the epiglottis effectively invited a bolus to two lateral pathways, suggesting a high robustness of the swallowing process.NEW & NOTEWORTHY Thickening agents are often used for patients with dysphagia. An increase in bolus viscosity not only reduces the risk of aspiration but also can cause a residual volume in the pharynx. Because information obtained from videofluoroscopic swallowing studies is only two-dimensional, measurement of pharyngeal residue is experimentally difficult. We successfully quantified the three-dimensional bolus pathway and the pharyngeal residual volume using computational modeling and simulation.

    2019年, American Journal of Physiology- Gastrointestinal and Liver Physiology,, 317 (6), G784-G792, 英語, 国際誌

    [査読有り]

    研究論文(学術雑誌)

  • Shunichi Ishida, Akihisa Ami, Yohsuke Imai

    Cytoadhesion of red blood cells infected by Plasmodium falciparum (Pf-IRBCs) is predominantly found in postcapillary venules, rather than in arterioles. However, factors influencing this phenomenon remain unclear. Here, we conduct a systematic study using a numerical model coupling the fluid and solid mechanics of the cells and cellular environment with the biochemical ligand-receptor interaction. Our results show that, once a Pf-IRBC adheres to the vascular wall, the Pf-IRBC can withstand even arteriole shear stresses, and exhibits either rolling or firm adhesion. We also perform a simulation of the multistep process of cytoadhesion, consisting of flow, margination, capture, and rolling or firm adhesion. This multistep simulation suggests that a lower probability of contact with the vascular wall at high shear rates may diminish adherent Pf-IRBCs in the arterioles.

    CELL PRESS, 2017年09月, BIOPHYSICAL JOURNAL, 113 (5), 1163 - 1172, 英語

    [査読有り]

    研究論文(学術雑誌)

  • Taimei Miyagawa, Yohsuke Imai, Shunichi Ishida, Takuji Ishikawa

    The relationship between gastric motility and the mixing of liquid food in the stomach was investigated with a numerical analysis. Three parameters of gastric motility were considered: the propagation velocity, frequency, and terminal acceleration of peristaltic contractions. We simulated gastric flow with an anatomically realistic geometric model of the stomach, considering free surface flow and moving boundaries. When a peristaltic contraction approaches the pylorus, retropulsive flow is generated in the antrum. Flow separation then occurs behind the contraction. The extent of flow separation depends on the Reynolds number (Re), which quantifies the inertial forces due to the peristaltic contractions relative to the viscous forces of the gastric contents; no separation is observed at low Re, while an increase in reattachment length is observed at high Re. While mixing efficiency is nearly constant for low Re, it increases with Re for high Re because of flow separation. Hence, the effect of the propagation velocity, frequency, or terminal acceleration of peristaltic contractions on mixing efficiency increases with Re.

    AMER PHYSIOLOGICAL SOC, 2016年12月, AMERICAN JOURNAL OF PHYSIOLOGY-GASTROINTESTINAL AND LIVER PHYSIOLOGY, 311 (6), G1114 - G1121, 英語

    [査読有り]

    研究論文(学術雑誌)

  • Naoki Takeishi,, Yohsuke Imai, Shunichi Ishida, Toshihiro Omori, Roger D. Kamm, Takuji Ishikawa

    A numerical analysis is presented of cell adhesion in capillaries whose diameter is comparable to or smaller than that of the cell. In contrast to a large number of previous efforts on leukocyte and tumor cell rolling, much is still unknown about cell motion in capillaries. The solid and fluid mechanics of a cell in flow was coupled with a slip bond model of ligand-receptor interactions. When the size of a capillary was reduced, the cell always transitioned to "bullet-like" motion, with a consequent decrease in the velocity of the cell. A state diagram was obtained for various values of capillary diameter and receptor density. We found that bullet motion enables firm adhesion of a cell to the capillary wall even for a weak ligand-receptor binding. We also quantified effects of various parameters, including the dissociation rate constant, the spring constant, and the reactive compliance on the characteristics of cell motion. Our results suggest that even under the interaction between P-selectin glycoprotein ligand-1 (PSGL-1) and P-selectin, which is mainly responsible for leukocyte rolling, a cell is able to show firm adhesion in a small capillary. These findings may help in understanding such phenomena as leukocyte plugging and cancer metastasis.

    AMER PHYSIOLOGICAL SOC, 2016年08月, AMERICAN JOURNAL OF PHYSIOLOGY-HEART AND CIRCULATORY PHYSIOLOGY, 311 (2), H395 - H403, 英語

    [査読有り]

    研究論文(学術雑誌)

  • Shunichi Ishida, Yohsuke Imai, Yuki Ichikawa, Stephanie Nix, Daiki Matsunaga, Toshihiro Omori, Takuji Ishikawa

    We developed a numerical model of the behavior of a red blood cell infected by Plasmodium falciparum malaria on a wall in shear flow. The fluid and solid mechanics of an infected red blood cell (Pf-IRBC) were coupled with the biochemical interaction of ligand-receptor bindings. We used the boundary element method for fluid mechanics, the finite element method for membrane mechanics, and the Monte Carlo method for ligand-receptor interactions. We simulated the behavior of a Pf-IRBC in shear flow, focusing on the effects of bond type. For slip bonds, the Pf-IRBC exhibited firm adhesion, tumbling motion, and tank-treading motion, depending on the applied shear rate. The behavior of catch bonds resembled that of slip bonds, except for a 'catch' state at high shear stress. When the reactive compliance decreased to a value in the order of 10(-2) nm, both the slip and catch bonds behaved like an ideal bond. Such bonds do not respond to the force applied to the bond, and the velocity is stabilized at a high shear rate. Finally, we compared the numerical results with previous experiments for A4- and ItG-infected cells. We found that the interaction between PfEMP1 and ICAM-1 could be a nearly ideal bond, with a dissociation rate ranging from 30 s(-1) to 100 s(-1).[GRAPHICS]

    TAYLOR & FRANCIS LTD, 2016年, SCIENCE AND TECHNOLOGY OF ADVANCED MATERIALS, 17 (1), 454 - 461, 英語

    [査読有り]

    研究論文(学術雑誌)

  • Yohsuke Imai, Ikuma Kobayashi, Shunichi Ishida, Takuji Ishikawa, Martin Buist, Takami Yamaguchi

    We investigate flow in the stomach during gastric mixing using a numerical simulation with an anatomically realistic geometry and freesurface flow modeling. Because of momentum differences between greater and lesser curvatures during peristaltic contractions, timeaveraged recirculation is generated in the antrum, with retropulsive flow away from the pylorus and compensation flow along the greater curvature toward the pylorus. Gastric content in the distal stomach is continuously transported to the distal antrum by the forward flow of antral recirculation, and it is then mixed by the backward retropulsive flow. Hence, the content inside the antral recirculation is well mixed independently of initial location, whereas the content outside the recirculation is poorly mixed. Free-surface modeling enables us to analyze the effects of posture on gastric mixing. In the upright, prone, and right lateral positions, most of the antrum is filled with content, and the content is well mixed by antral recirculation. In contrast, in the supine and left lateral positions, most of the content is located outside antral recirculation, which results in poor mixing. The curved, twisted shape of the stomach substantially supports gastric mixing in fluid mechanical terms. © 2013 the American Physiological Society.

    2013年, American Journal of Physiology - Gastrointestinal and Liver Physiology, 304 (5), G536 - G542, 英語

    [査読有り]

    研究論文(学術雑誌)

  • Shunichi Ishida, Ryota Matsumoto, Daiki Matsunaga, Yohsuke Imai

    American Physical Society (APS), 2022年06月, Physical Review Fluids, 7 (6)

    [査読有り]

    研究論文(学術雑誌)

  • Shunichi Ishida, Yaochen Yang, Fanlong Meng, Daiki Matsunaga

    We investigate how ferrofluid droplets suspended in a wall-bounded shear flow can organize when subjected to an external magnetic field. By tuning the magnitude of the external magnetic field, we find that the ferrofluid droplets form chain-like structures in the flow direction when the magnetic field is weak, while forming a crystal-like pattern in a strong magnetic field. We provide the phase diagram and the critical conditions for this chain-to-crystal transition, by applying both numerical simulations and analytic calculations. We also examine how the organized patterns of the ferrofluid droplets can be controlled by simply changing the direction of the magnetic field. This work demonstrates new aspects of field-controllable ferrofluid droplets as a configurable and reprocessable metamaterial.

    AIP Publishing, 2022年06月, Physics of Fluids, 34 (6), 063309

    [査読有り]

    研究論文(学術雑誌)

MISC

  • B212 細胞骨格運動の数値シミュレーション(B2-3 数理・計算バイオメカニクス2)

    齊藤 史恭, 今井 陽介, 石田 駿一, 大森 俊宏, 石川 拓司

    一般社団法人日本機械学会, 2015年10月01日, バイオフロンティア講演会講演論文集, 2015 (26), 123 - 124, 日本語

  • PS3-7 DEVELOPMENT OF A NUMERICAL MODEL OF CYTOSKELETON DYNAMICS(PS3: Poster Short Presentation III,Poster Session)

    Saito Fumiyasu, Imai Yohsuke, Ishida Shunichi, Omori Toshihiro, Ishikawa Takuji

    一般社団法人日本機械学会, 2015年09月16日, Proceedings of the ... Asian Pacific Conference on Biomechanics : emerging science and technology in biomechanics, 2015 (8), 268 - 268, 英語

講演・口頭発表等

  • 格子ボルツマン法による高流量鼻腔カニューラの数値流体力学解析

    川畑祐人, 石田駿一, 三住拓誉, 今井陽介

    第32回バイオフロンティア講演会, 2022年01月

  • 流れの中の赤血球に対するIGA-LBM

    浅井悠佑, 石田駿一, 寺原拓哉, 滝沢研二, 今井陽介

    第32回バイオフロンティア講演会, 2022年01月

  • Local mesh refinement for cumulant lattice Boltzmann method: a level conversion method

    Yuto Kawabata, Shunichi Ishida, Yohsuke Imai

    The 11th Asian-Pacific Conference on Biomechanics, 2021年12月

  • Computational fluid dynamics analysis of effect of ciliary motion on cerebrospinal fluid flow

    Haruki Yoshida, Shunichi Ishida, Taiki Yamamoto, Kazuhito Takeuchi, Yuichi Nagata, Hironori Ueno, Yohsuke Imai

    The 11th Asian-Pacific Conference on Biomechanics, 2021年12月

  • Isogeometric hyperelastic analysis for cell membrane protrusion

    Yuya Yamaguchi, Hironori Takeda, Yusuke Asai, Shunichi Ishida, Yohsuke Imai

    The 11th Asian-Pacific Conference on Biomechanics, 2021年12月

  • Effect of peristaltic frequency on gastric emptying: a simulation study

    Rika Ebara, Shunichi Ishida, Taimei Miyagawa, Yohsuke Imai

    The 11th Asian-Pacific Conference on Biomechanics, 2021年12月

  • Coupling isogeometric analysis with lattice Boltzmann method for simulating red blood cells in flows

    Yusuke Asai, Shunichi Ishida, Takuya Terahara, Kenji Takizawa, Yohsuke Imai

    The 11th Asian-Pacific Conference on Biomechanics, 2021年12月

  • The behavior of a ferrofluid droplet in external magnetic fields under oscillating shear flow

    Shota Tokuyama, Yohsuke Imai, Shunichi Ishida

    The 11th Asian-Pacific Conference on Biomechanics, 2021年12月

  • Cumulant lattice Boltzmann method for peristaltic transport of power-law fluids

    Kohei Maeyama, Shunichi Ishida, Yohsuke Imai

    The 11th Asian-Pacific Conference on Biomechanics, 2021年12月

  • A computational model of cell adhesion and migration under fluid shear stress

    Yusuke Kido, Shunichi Ishida, Yohsuke Imai

    The 11th Asian-Pacific Conference on Biomechanics, 2021年12月

  • 嚥下の三次元数値シミュレーション:嚥下の冗長性と咽頭圧の関係

    石田駿一, 福嶋泰人, 太田淳, 川瀬哲明, 香取幸夫, 今井陽介

    第34回計算力学講演会, 2021年09月

  • 嚥下流動の数値流体力学解析

    石田駿一, 福嶋泰人, 太田淳, 川瀬哲明, 香取幸夫, 今井陽介

    第33回バイオエンジニアリング講演会, 2021年06月

  • カプセルの流動計算のためのIGA-LBM

    浅井悠佑, 石田駿一, 寺原拓哉, 滝沢研二, 今井陽介

    第26回計算工学講演会, 2021年06月

  • Development of a CFD simulator of whole cerebral blood flow

    Shunichi Ishida, Hiroki Kitade, Satoshi Ii, Yohsuke Imai, Shigeo Wada

    The 3rd International Conference on Computational Engineering and Science for Safety and Environmental Problems (COMPSAFE2020), 2020年12月

  • 流体中の膜挙動に対するisogeometric流体構造連成手法の開発

    浅井悠佑, 石田駿一, 今井陽介

    第25回計算工学講演会, 2020年06月

  • 全脳循環血流シミュレータの開発

    石田駿一, 北出宏紀, 伊井仁志, 今井陽介, 和田成生

    第32回バイオエンジニアリング講演会, 2019年12月

  • Numerical analysis of large-scale cerebral artery blood flow using patient-specific cerebrovascular models

    Yuima Kobayashi, Shunichi Ishida, Naoki Takeishi, Yohsuke Imai, Shigeo Wada

    The 10th Asian-Pacific Conference on Biomechanics, 2019年11月

  • 脳血管網モデリングと全脳循環血流場の数値計算

    石田駿一, 北出宏紀, 伊井仁志, 今井陽介, 和田成生

    第32回計算力学講演会, 2019年09月

  • 大脳動脈の被験者個別モデルを用いた大規模血流解析

    小林維磨, 石田駿一, 武石直樹, 今井陽介, 和田成生

    第32回計算力学講演会, 2019年09月

  • ネットワーク構造と液体膜の連成計算

    谷口悠, 石田駿一, 今井陽介, 武石直樹, 横山直人, 和田成生

    第32回計算力学講演会, 2019年09月

  • Development of a numerical model of whole-scale cerebral circulation

    Shunichi Ishida, Hiroki Kitade, Satoshi II, Naoki Takeishi, Yoshiyuki Watanabe, Yohsuke Imai, Shigeo Wada

    The 29th International Symposium on Cerebral Blood Flow, Metabolism and Function, 2019年07月

  • Modeling cerebral vasculatures for analysis of the whole cerebral circulation

    Hiroki Kitade, Satoshi II, Shunichi Ishida, Yohsuke Imai, Shigeo Wada

    6th International Conference on Computational and Mathematical Biomedical Engineering, 2019年06月

  • 全脳循環血流場の大規模並列シミュレーション

    石田駿一, 北出宏紀, 伊井仁志, 今井陽介, 和田成生

    第24回計算工学講演会, 2019年05月

  • 格子ボルツマン法による生体流れの数値計算

    石田駿一

    第31回格子ボルツマンの基礎と応用に関する研究会(LBM研究会), 2019年05月

    [招待有り]

  • 胃内容物の撹拌・排出の数値シミュレーション

    石田駿一, 宮川泰明, Gregory O’Grady, Leo K. Cheng, 今井陽介

    第31回バイオエンジニアリング講演会, 2018年12月

  • 数値力学試験によるフィブリン凝集塊の巨視的力学特性の評価

    榎崎凌伍, 武石直樹, 重松大輝, 石田駿一, 伊井仁志, 和田成生

    第31回バイオエンジニアリング講演会, 2018年12月

  • 実形状モデルを用いた胃内流動の数値計算

    石田駿一, 宮川泰明, Gregory O’Grady, Leo K. Cheng, 今井陽介

    第32回数値流体力学シンポジウム, 2018年12月

  • Mesoscopic Protofibril Aggregation Model for Numerical Analysis of Fibrin Clot Formation

    Rhogo Enosaki, Naoki Takeishi, Taiki Shigematsu, Shunichi Ishida, Satoshi Ii, Shigeo Wada

    The 71st Annual Meeting of The APS Division of Fluid Dynamics, 2018年11月

  • 胃の撹拌・排出の計算力学解析

    石田駿一, 宮川泰明, Gregory O’Grady, Leo K. Cheng, 今井陽介

    第31回計算力学講演会, 2018年11月

  • フィブリン凝集塊形成の数値シミュレーション:個々の凝集条件が凝集塊構造に与える影響

    榎崎凌伍, 武石直樹, 重松大輝, 石田駿一, 伊井仁志, 新岡宏彦, 和田成生

    第29回バイオフロンティア講演会, 2018年10月

  • 全脳循環血流場の数値シミュレーションに向けた脳血管構造モデリング

    北出宏紀, 伊井仁志, 今井陽介, 石田駿一, 和田成生

    第29回バイオフロンティア講演会, 2018年10月

  • 微小循環におけるマラリア感染赤血球の接着挙動の数値解析

    石田駿一, 阿見祥寿, 今井陽介

    日本機械学会2018年度年次大会, 2018年09月, 日本語

  • Relationship between gastric wall motility and mixing of liquid foods in the stomach

    Taimei Miyagawa, Shunichi Ishida, Gregory O’Grady, Leo K. Cheng, Yohsuke Imai

    The 8th World Congress of Biomechanics, 2018年07月, 英語, 国内会議

    ポスター発表

  • Numerical simulation of cytoadhesion of red blood cells infected by Plasmodium falciparum

    Shunichi Ishida, Akihisa Ami, Yohsuke Imai

    The 8th World Congress of Biomechanics, 2018年07月, 英語, 国際会議

    口頭発表(一般)

  • 流体力学-固体力学-生化学の連成計算による微小循環におけるマラリア感染赤血球の挙動解析

    石田駿一, 阿見祥寿, 今井陽介

    第23回計算工学講演会, 2018年06月, 日本語

  • 重力に依存した嚥下運動の数値流体力学シミュレーションの開発

    太田 淳, 石田 駿一, 川瀬 哲明, 香取 幸夫, 今井 陽介

    日本耳鼻咽喉科学会会報, 2018年04月, 日本語, (一社)日本耳鼻咽喉科学会

  • 胃における蠕動運動と流れの関係についての一考察

    宮川泰明, 石田駿一, O’Grady Gregory, Cheng Leo K, 今井陽介

    第30回計算力学講演会, 2017年09月, 日本語

  • マラリア感染赤血球の接着挙動の数値計算

    石田駿一, 今井陽介, 阿見祥寿

    第30回計算力学講演会, 2017年09月, 日本語

  • 胃から十二指腸への食物排出の数値計算

    今井陽介, 石田駿一, 宮川泰明, O’Grady Gregory, Cheng Leo K

    第22回計算工学講演会, 2017年06月, 日本語

  • 胃内部の固体粒子挙動の数値計算

    石田駿一, 今井陽介, 宮川泰明, 石川拓司

    第29回バイオエンジニアリング講演会, 2017年01月, 日本語

  • 胃壁の運動機能と胃内容物攪拌の関係

    宮川泰明, 今井陽介, 石田駿一, 山口隆美, 石川拓司

    第29回バイオエンジニアリング講演会, 2017年01月, 日本語

  • Development of a biomechanical model of cell behavior subjected to cyclic stretch

    Fumiyasu Saito, Yohsuke Imai, Shunichi Ishida, Toshihiro Omori, Takuji Ishikawa

    The 16th International Conference on Biomedical Engineering, 2016年12月, 英語

  • Relationship between peristaltic contraction and gastric mixing

    Yohsuke Imai, Taimei Miyagawa, Shunichi Ishida, Takami Yamaguchi, Takuji Ishikawa

    The 16th International Conference on Biomedical Engineering, 2016年12月, 英語

  • Numerical analysis of cell adhesion in capillary flow

    Naoki Takeishi, Yohsuke Imai, Shunichi Ishida, Toshihiro Omori, Roger Kamm, Takuji Ishikawa

    The 69th Annual Meeting of The APS Division of Fluid Dynamics, 2016年11月, 英語

  • 胃における蠕動運動の流れの数値流体力学解析

    今井陽介, 宮川泰明, 石田駿一, 石川拓司

    日本流体力学会年会2016, 2016年09月, 日本語

  • 蠕動運動と胃内容物攪拌の関係

    宮川泰明, 今井陽介, 石田駿一, 山口隆美, 石川拓司

    第28回バイオエンジニアリング講演会, 2016年01月, 日本語

  • 細胞骨格運動の数値シミュレーション

    齊藤史恭, 今井陽介, 石田駿一, 山口隆美, 石川拓司

    第26回バイオフロンティア講演会, 2015年10月, 日本語

  • Graphics processing unit computing of cellular flow and adhesion in microvessels

    Yohsuke Imai, Naoki Takeishi, Shunichi Ishida, Takuji Ishikawa

    The 3rd International Workshops on Advances in Computational Mechanics, 2015年10月, 英語

  • Development of a Numerical Model of Cytoskeleton Dynamics

    Fumiyasu Saito, Yohsuke Imai, Shunichi Ishida, Toshihiro Omori, Takuji Ishikawa

    The 8th Asian-Pacific Conference on Biomechanics, 2015年09月, 英語

  • Clarification of Relationship between Gastric Mixing and Movement of Wall

    Taimei Miyagawa, Yohsuke Imai, Shunichi Ishida, Takami Yamaguchi, Takuji Ishikawa

    The 8th Asian-Pacific Conference on Biomechanics, 2015年09月, 英語

  • A numerical simulation of cytoadhesion and rosette formation of red blood cells infected by malaria

    Yohsuke Imai, Yuki Ichikawa, Shunichi Ishida, Daiki Matsunaga, Stephanie Nix, Toshihiro Omori, Takami Yamaguchi, Takuji Ishikawa

    The 8th Asian-Pacific Conference on Biomechanics, 2015年09月

  • 胃内容物攪拌の数値計算:胃壁の運動の影響

    宮川泰明, 今井陽介, 石田駿一, 山口隆美, 石川拓司

    第20回計算工学講演会, 2015年06月, 日本語

  • 細胞骨格の運動の計算力学モデルの開発

    齊藤史恭, 今井陽介, 石田駿一, 山口隆美, 石川拓司

    日本機械学会東北支部第50期総会・講演会, 2015年03月, 日本語

  • 胃内のせん断応力の数値解析

    宮川泰明, 今井陽介, 石田駿一, 山口隆美, 石川拓司

    第27回バイオエンジニアリング講演会, 2015年01月, 日本語

  • Shear Stress Distribution in the Stomach

    Taimei Miyagawa, Yohsuke Imai, Shunichi Ishida, Takami Yamaguchi, Takuji Ishikawa

    Internationnal Symposium on Integrated Nanobiomechanics, 2014年09月, 英語

  • Modeling of flow in the stomach

    Yohsuke Imai, Ikuma Kobayashi, Taimei Miyagawa, Shunichi Ishida, Takuji Ishikawa, Takami Yamaguchi

    The 4th Japan-Switzerland workshop on biomechanics, 2014年09月, 英語

  • How Does Gastric Mixing Proceed over Minutes?

    Yohsuke Imai, Ikuma Kobayashi, Taimei Miyagawa, Shunichi Ishida, Takami Yamaguchi, Takuji Ishikawa

    Advances in Computational Fluid-Structure Interaction and Flow Simulation, 2014年03月, 英語

  • 実形状モデルを用いた胃内容物攪拌の数値流体力学解析

    今井陽介, 小林生馬, 石田駿一, 石川拓司, 山口隆美

    第17回計算工学講演会, 2012年05月, 日本語

  • GPUを用いた胃内容物攪拌の3次元計算

    小林生馬, 今井陽介, 石田駿一, 石川拓司, 山口隆美

    第24回バイオエンジニアリング講演会, 2012年01月, 日本語

  • A numerical computation on gastric mixing using GPU

    Ikuma Kobayashi, Yohsuke Imai, Shunichi Ishida, Takuji Ishikawa, Takami Yamaguchi

    5th East Asian Pacific Student Workshop on Nano-Biomedical Engineering, 2011年12月, 英語

  • 嚥下造影画像に基づく嚥下の計算力学解析

    石田駿一, 今井陽介, 石川拓司, 金城亜紀, 松木範明, 山口隆美

    第24回計算力学講演会, 2011年10月, 日本語

  • 胃内容物攪拌の数値計算

    小林生馬, 今井陽介, 石田駿一, 石川拓司, 山口隆美

    第24回計算力学講演会, 2011年10月, 日本語

  • Swallowing simulation based on videofluorography

    Shunichi Ishida, Yohsuke Imai, Takuji Ishikawa, Aki Kinjyo, Noriaki Matsuki, Takami Yamaguchi

    International Conference on BioTribology, 2011年09月, 英語

  • 胃内容物攪拌の数値流体力学モデルの開発

    今井陽介, 小林生馬, 石田駿一, 石川拓司, 山口隆美

    第23回バイオエンジニアリング講演会, 2011年01月, 日本語

  • 嚥下造影画像に基づく嚥下の数値シミュレーション

    石田駿一, 今井陽介, 石川拓司, 金城亜紀, 松木範明, 山口隆美

    第23回バイオエンジニアリング講演会, 2011年01月, 日本語

  • Analysis of swallowing motion based on videofluorography

    Shunichi Ishida, Yohsuke Imai, Aki Kinjyo, Noriaki Matsuki, Takuji Ishikawa, Takami Yamaguchi

    6th World Congress of Biomechanics, 2010年08月, 英語

  • A numerical study on fluid motion in the stomach

    Ikuma Kobayashi, Yohsuke Imai, Shunichi Ishida, Takuji Ishikawa, Takami Yamaguchi

    6th World Congress of Biomechanics, 2010年08月, 英語

  • 粒子法を用いた胃内容物攪拌の数値シミュレーション

    小林生馬, 今井陽介, 石田駿一, 石川拓司, 山口隆美

    日本機械学会東北支部第45期総会・講演会, 2010年03月, 日本語

  • 胃内容物流れの数値シミュレーション:内容物量の影響

    小林生馬, 今井陽介, 石田駿一, 石川拓司, 山口隆美

    第21回バイオフロンティア講演会, 2010年01月, 日本語

  • 嚥下造影画像に基づく食塊・喉頭蓋の運動解析

    石田駿一, 今井陽介, 松木範明, 金城亜紀, 石川拓司, 山口隆美

    第20回バイオフロンティア講演会, 2009年11月, 日本語

  • 嚥下造影画像を用いた嚥下メカニズムの力学的考察

    石田駿一, 今井陽介, 石川拓司, 金城亜紀, 松木範明, 山口隆美

    日本機械学会東北支部第44期総会・講演会, 2009年03月, 日本語

  • 局所的な膜面積の増加にともなう細胞膜突出のアイソジオメトリック解析

    竹田宏典, 山口悠也, 石田駿一, 今井陽介

    第34回バイオエンジニアリング講演会, 2022年06月

  • 胃内流動の数値流体力学解析:蠕動収縮の発生頻度と振幅の影響

    石田駿一, 江原りか, 今井陽介

    第34回バイオエンジニアリング講演会, 2022年06月

所属学協会

  • 日本計算力学連合

  • 日本機械学会