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Evaluation of Patient-Specific Quality Assurance for Carbon Ion Radiotherapy Using Full Energy Scanning Method at QST Hospital

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International Journal of Medical Physics, Clinical Engineering and Radiation Oncology 2022年第4期11卷 200-209页

作者： Asami Inomata Masashi Katsumata Sung Hyun Lee Yui Suzuki Takeo Nakajima wataru furuichi Keishi Yamaoka Atsushi Yamamoto Hideyuki Mizuno Ryosuke Kohno Accelerator Engineering Corporation Chiba Japan Department of Accelerator and Medical Physics National Institutes for Quantum and Radiological Science and Technology Chiba Japan Department of Heavy Particle Medical Science Graduate School of Medical Science Yamagata University Yamagata Japan QST Hospital National Institutes for Quantum and Radiological Science and Technology Chiba Japan Department of Radiological Sciences International University of Health and Welfare Tochigi Japan

Purpose: Patient-specific QA (PSQA) measurements for carbon ion radiotherapy (CIRT) are critical components of processes designed to identify discrepancies between calculated and delivered doses. We report the results of PSQA conducted at the QST Hospital during the period from September 2017 to March 2018. Methods: We analyzed PSQA results for 1448 fields for 10 disease sites with various target volumes, target depths and number of energy layers. For the PSQA, all the planned beams were recalculated on a water phantom with treatment planning software. The recalculated dose distributions were compared with the measured distributions using a 2D ionization chamber array at three depths, including 95% of the area of the prescription dose. These recalculated dose distributions were evaluated using the 3%/3mm gamma index with a passing threshold of 90%. Results: The passing rates for prostate, head and neck, and bone and soft tissue were 96.8%, 99.3%, and 91.7%, respectively. Additionally, 94.7% of lung plans with low energy beams passed. Overall, the CIRT in the QST Hospital reached a high passing rate of more than 95%. Although the remaining 5% failed to pass, there was no dependence between measurement depth and disease sites in these failures. Conclusion: Using PSQA measurements, we confirmed consistency between the planned and delivered doses for CIRT using the full energy scanning method.

关键词： Carbon Ion Radiotherapy Full Energy Scanning Patient-Specific Quality Assurance Gamma Index

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Evaluation of Patient-Specific Quality Assurance for Carbon Ion Radiotherapy Using Full Energy Scanning Method at QST Hospital

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International Journal of Medical Physics, Clinical Engineering and Radiation Oncology（医学物理学、临床工程、放射肿瘤学） 2022年第4期

作者： asami inomata masashi katsumata sung hyun lee yui suzuki takeo nakajima wataru furuichi keishi yamaoka atsushi yamamoto hideyuki mizuno ryosuke kohno

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Quasi-stationary flow structure in turbidity currents

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International Journal of Sediment Research 2020年第6期35卷 659-665页

作者： Shun Nomura Giovanni De Cesare Mikito furuichi Yasushi Takeda Hide Sakaguchi Center for Mathematical Science and Advanced Technology JAMSTEC Plateforme de Constructions Hydrauliques EPFL Laboratory of Food Process Engineering ETH Headquarters JAMSTEC

A turbidity current is a particle-laden current driven by density differences due to suspended sediment *** currents can transport large amounts of sediment down slopes over great distances,and play a significant role in fluvial,lake and submarine *** better understand the sediment transport process,the flow system of an experimentally produced turbidity current in an inclined flume was investigated using video *** observed that the current progresses with constant frontal velocity and maintains an unchanged global interface *** addition,the spatio-temporal profiles of the inner mean and turbulence velocity obtained by ultrasound velocity profiler(UVP) showed that similar distributions were maintained,with low *** results indicate that the turbidity current progressed in a quasi-stationary state,which enabled long-distance sediment *** understand the mechanisms behind the quasi-stationary flow,we analyzed the forces acting on the turbidity *** found that under particular densities of suspended particles,the gravitational force is balanced by the viscous forces along the slope *** conclude that this specific force balance induces the quasi-stationary flow structure,enabling the long-distance transport of a substantial amount of sediment downstream with low dissipation.

关键词： Turbidity current Velocity field Mass valance Image processing Ultrasound Doppler velocity profiling Flume experiment

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Depletion of CD25^+CD4^+T cells (Tregs) enhances the HBV-specific CD8^+ T cell response primed by DNA immunization

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World Journal of Gastroenterology 2005年第24期11卷 3772-3777页

作者： Yoshihiro furuichi Hirotake Tokuyama Satoshi Ueha Makoto Kurachi Fuminori Moriyasu Kazuhiro Kakimi Fourth Department of Internal Medicine (Gastroenterology and Hepatology) Department of Molecular and Preventive Medicine Department of Immunotherapeutics (Medinet)

AIM: Persistent hepatitis B virus (HBV) infection is characterized by a weak CD8+ T cell response to HBV. Immunotherapeutic strategies that overcome tolerance and boost these suboptimal responses may facilitate viral clearance in chronically infected individuals. Therefore, we examined whether CD25+CD4+ regulatory T (Treg) cells might be involved in a inhibition of CD8+T cell priming or in the modulation of the magnitude of the 'peak' antiviral CD8+ T cell response primed by DNA immunization. METHODS: B10.D2 mice were immunized once with plasmid pCMV-S. Mice received 500 μg of anti-CD25 mAb injected intraperitoneally 3 d before DNA immunization to deplete CD25+ cells. Induction of HBV-specific CD8+ T cells in peripheral blood mononuclear cells (PBMCs) was measured by S28-39 peptide loaded DimerX staining and their function was analyzed by intracellular IFN-γ staining. RESULTS: DNA immunization induced HBV-specific CD8+ T cells. At the peak T cell response (d 10), 7.1±2.0% of CD8+ T cells were HBV-specific after DNA immunization, whereas 12.7±3.2% of CD8+ T cells were HBV-specific in Treg-depleted mice, suggesting that DNA immunization induced more antigen-specific CD8+ T cells in the absence of CD25+ Treg cells (n = 6, P<0.05). Similarly, fewer HBV specific memory T cells were detected in the presence of these cells (1.3±0.4%) in comparison to Treg-depleted mice (2.6±0.9%) on d 30 after DNA immunization (n - 6, P<0.01). Both IFN-γ production and the avidity of the HBV-specific CD8+ T cell response to antigen were higher in HBV-specific CD8+ T cells induced in the absence of Treg cells. CONCLUSION: CD25+ Treg cells suppress priming and/or expansion of antigen-specific CD8+ T cells during DNA immunization and the peak CD8+ T cell response is enhanced by depleting this cell population. Furthermore, Treg cells appear to be involved in the contraction phase of the CD8+ T cell response and may affect the quality of memory T cell pools. The elimination of Treg cells or the

关键词： Hepatitis B virus Regulatory T cell (Treg) Cytotoxic T lymphocyte DNA immunization Vaccine

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Spatio-temporal deposition profile of an experimentally produced turbidity current with a continuous suspension supply

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International Journal of Sediment Research 2022年第3期37卷 299-306页

作者： Shun Nomura Giovanni De Cesare Mikito furuichi Yasushi Takeda Hide Sakaguchi Mathematical Science and Advanced Technology JAMSTEC Plateforme de Constructions Hydrauliques EPFL Laboratory of Food Process Engineering ETH Headquarters JAMSTEC

A turbidity current is a turbulent, particle-laden gravity current that is driven by density differences resulting from the presence of suspended sediment particles. The current travels downslope, bearing a large amount of sediment over a great distance, and forms fluvial and submarine bedforms. Knowledge of the spatio-temporal deposition profile of turbidity-deposited sediment is important for a better understanding of sediment transport by turbidity currents. In the current study, the depositional process of experimentally produced quasi-steady turbidity currents in an inclined flume was investigated using an electrical-resistance-based depositmeter. It was found that the amount of sediment deposited along the flume bottom increases linearly with time at a specific rate, and decreases exponentially in the downstream direction. Inspired by this observation, the mass conservation law was modified for the suspension layer and a simple theoretical model was proposed involving two parameters, the initial sedimentation rate and the decay constant. The proposed model reproduces the observed data from the flume experiment with high accuracy, and is consistent with the sediment transport distance of a natural example, the Bengal Fan. It was concluded that the two parameters that govern the sedimentation process are the key to estimating the deposition profile of fluvial systems.

关键词： Turbidity current Deposition process Mass conservation law Electrical-resistance-based depositmeter Spatio-temporal investigation Flume experiment

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A Case of CD34-Negative Superficial Acral Fibromyxoma

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Modern Plastic Surgery 2012年第4期2卷 77-79页

作者： Marie furuichi Keisuke Okabe Kazuo Kishi Departments of Plastic and Reconstructive Surgery Keio University School of Medicine Tokyo Japan

Superficial acral fibromyxoma (SAF) is a tumor that occurs on the distal phalanges of the digits. As it does not spontaneously regress and is often associated with pain, the primary treatment is surgical resection. It is often associated with the nail component of the affected digit, and thus cosmesis is an important goal of the operation. We herein describe a case of SAF on the distal phalanges of the fifth digit of the foot beneath the nail, which was successfully resected with the nail component kept intact. Moreover, although SAF is most commonly CD34-positive, the present case was CD34-negative except for endothelial cells within the tumor. While CD34-negative SAF has been previously reported, the current case further indicates that CD34-positivity is not essential for the diagnosis of SAF.

关键词： Superficial Acral Fibromyxoma CD34 Nail

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Numerical Simulation for Remediation Planning for 1,4-Dioxane-Contaminated Groundwater at Kuwana Illegal Dumping Site in Japan Based on the Concept of Verified Follow Up

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Journal of Water Resource and Protection 2013年第7期5卷 699-708页

作者： Ramrav Hem Toru furuichi Kazuei Ishii Yu-Chi Weng Laboratory of Sound Material-Cycle Systems Planning Graduate School of Engineering Hokkaido University Sapporo Japan

At Kuwana illegal dumping site in Japan, where hazardous waste was illegally dumped, groundwater was severely contaminated by Volatile Organic Compounds (VOCs). Groundwater was already remedied by conducting Pump-and-Treat (P&T) after containment of all the waste by vertical slurry walls from 2002 to 2007. However, 1,4-dioxane was detected in both waste and groundwater outside of slurry walls after it was newly added into Japan environmental standards in late 2009, which suggested that the walls did not contain 1,4-dioxane completely. Our previous study developed a model to predict the 1,4-dioxane distribution in groundwater after the previous remediation at the site. In this study, numerical simulation was applied for remediation planning at the site based on the concept of Verified Follow Up (VF-UP) that had been proposed as a new approach to complete remediation effectively with consideration of future risks. The amount of waste to be removed and pumping plans were discussed by numerical simulation to achieve the remedial objective in which 1,4-dioxane in groundwater outside of walls is remedied within 10 years and 1,4-dioxane spreading throughout the walls is prevented in the case where a portion of waste is remained. Firstly, the amount of waste to be removed considering pumping plans for P&T was determined by scenario analysis. As a result, at least two-third of waste should be removed by combining with P&T. However, if the waste is remained, future risks of 1,4-dioxane spreading through the slurry walls may occur. Our simulation suggested that groundwater within the remaining waste must be pumped up at least 20 m3/d for containment of 1,4-dioxane within the remaining waste. In conclusion, our numerical simulation determined the amount of waste to be removed and the pumping plans for P&T to achieve the remedial objective effectively considering future risks based on the concept of VF-UP.

关键词： Remediation Planning Numerical Simulation Verified Follow Up Pump-and-Treat 1 4-Dioxane-Contaminated Groundwater Illegal Dumping Site

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Subcellular distribution of the nositol 1,4,5-trisphosphate receptors in the rat submandibular gland

Subcellular distribution of the nositol 1,4,5-trisphosphate ...

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Third Congress of the Asian-Pacific Organization for Cell Biology

作者： Miki YamamotoHino Teiichi furuichi Katsuhiko Mikoshiba Dev.Neurobiol. RIKEN Brain Science InstituteWako-citySaitama 351JapanMol. Neurobiol.Institute of Medical ScienceTokyo Univ.MinatokuTokyo 108Japan Mol. Neurobiol Institute of Medical ScienceTokyo Univ.MinatokuTokyo 108Japan Dev.Neurobiol. RIKEN Brain Science InstituteWako-citySaitama 351JapanMol. NeurobiolInstitute of Medical ScienceTokyo Univ.MinatokuTokyo 108Japan

We previously reported that inositol 1,4,5-trisphosphte receptors (IP3Rs) were enriched in small apical vesicles in the ductal epithelium of rat submandibular gland (SMG) and this polarity in subcellular localization

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Analysis of failing implants with peri-implantitis(Japan)

Analysis of failing implants with peri-implantitis(Japan)

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2019年中华口腔医学会牙周病学专业委员会牙周病与植体周病新分类·新理论·新技术高峰论坛

作者： Sho Sakamoto Takashi Kado Yasushi furuichi Division of Periodontology and Endodontology Department of Oral Rehabilitation School of Dentistry　Health Sciences University of Hokkaido Division of Dental Education Development Department of Integrated Dental Education School of　Dentistry Health Sciences University of Hokkaido

Objectives:Prevalence of Peri-implantitis is reported as high *** we are less well understood the cause of ***,the purpose of this study was to investigate the microbiota and immune responses around failing implants as well as the physicochemical characteristics of failed implant *** and Methods:A total of 8 patients with 17 failing implants were *** the microbiological analysis,plaque samples were obtained from six locations:a healthy tooth sulcus,an intact implant sulcus,deep-

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Usefulness of autotaxin for the complications of liver cirrhosis

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World Journal of Gastroenterology 2020年第1期26卷 97-108页

作者： Xue Shao Haruki Uojima Toru Setsu Tomomi Okubo Masanori Atsukawa Yoshihiro furuichi Yoshitaka Arase Hisashi Hidaka Yoshiaki Tanaka Takahide Nakazawa Makoto Kako Tatehiro Kagawa Katsuhiko Iwakiri Shuji Terai Wasaburo Koizumi Department of Gastroenterology Internal MedicineKitasato University School of MedicineSagamiharaKanagawa 252-0375Japan Department of Hepatopancreatobiliary Medic Department of Gastroenterology Shonan Kamakura General HospitalKamakuraKanagawa 247-8533Japan Division of Gastroenterology and Hepatology Graduate School of Medical and Dental SciencesNiigata UniversityNiigata 951-8510Japan Department of Internal Medicine Division of GastroenterologyNippon Medical School Chiba Hokusoh HospitalChiba 270-1694Japan Department of Internal Medicine Division of Gastroenterology and HepatologyNippon Medical SchoolTokyo 113-8603Japan Department of Gastroenterology and Hepatology Tokyo Medical University HospitalShinjukuTokyo 113-8510Japan Division of Gastroenterology and Hepatology Department of Internal MedicineTokai University School of MedicineKanagawa 259-1193Japan

BACKGROUND Autotaxin(ATX)has been reported as a direct biomarker for estimating the evaluation of liver *** available data on ATX as a useful biomarker for the complications of liver cirrhosis(LC)are *** To assess the clinical usefulness of ATX for assessing the complications of *** This multicenter,retrospective study was conducted at six locations in *** include patients with LC,n=*** ATX level was evaluated separately in men and women because of its high level in female *** assess the clinical usefulness of ATX for the complications of LC,the area under the curve(AUC)of ATX assessing for the severe complications was analyzed in comparison with the model for end-stage liver disease score,albumin-bilirubin(ALBI)score,fibrosis-4 index,and aspartate aminotransferase-to-platelet ratio *** The mean age was 68.4±11.4 years,240 patients(60.0%)were male.A total of 213(53.3%)and 187(46.8%)patients were compensated and decompensated,*** numbers of patients with varix rupture,hepatic ascites,and hepatic encephalopathy were 35(8.8%),131(32.8%),and 103(25.8%),*** AUCs of ATX in men for hepatic encephalopathy,hepatic ascites,and varix ruptures were 0.853,0.816,and 0.706,*** AUCs of ATX in women for hepatic encephalopathy,hepatic ascites,and varix rupture were 0.759,0.717,and 0.697,*** AUCs of ATX in men were higher than those in women,as were all the other biomarkers used to detect encephalopathy and varix ***,for detecting ascites,the AUC of ALBI in men was more effective than using *** ATX in men was more effective than any other biomarkers for detecting hepatic encephalopathy and varix ruptures.

关键词： Autotaxin Hepatic encephalopathy Hepatic ascites Liver fibrosis Biomarker

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