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Sociology Study 2013年第9期3卷 639-650页

作者： Fuyuki Yoshikane Chizuko Takei Keita Tsuji atsushi ikeuchi Takafumi Suzuki University of Tsukuba Japan Toyo University Japan

This study examined Japanese patents in terms of the quantitative characteristics of application documents that resulted in the acquisition of rights in order to clarify the relationship between the features and patentability of applications. The groups of approved applications and those that had not been approved were compared for 12 variables： publication time lag; numbers of inventors, classifications, pages, figures, tables, claims, priority claims, countries for priority claims, cited patents, and cited non-patent documents; and median of citation age. Furthermore, the authors carried out the experiments in which patent applications were automatically classified into two groups by the machine learning method, random forests. As a result, statistically significant differences between the two groups were observed for the following variables （p 〈 .001）： the numbers of inventors, pages, figures, claims, priority claims, and countries for priority claims were significantly larger in the group of approved applications, while the time lag until publication was smaller. In particular, the publication time lag and the numbers of inventors, pages, and figures were variables representing the features that largely contribute to discriminating approved applications in the classification using random forests, which implies that these have relatively strong relationships with patentability.

关键词： Technology management intellectual property rights patent analysis sociology of science Japan

Breaking the spatial restriction of pluripotency acquisition by environmental stimuli

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Molecular Plant 2023年第2期16卷 301-302页

作者： Momoko ikeuchi Division of Biological Science Graduate School of Science and TechnologyNara Institute of Science and TechnologyIkomaJapan

Plant cells have remarkable developmental plasticity,and many of them have the intrinsic potential to acquire *** some stimuli such as auxin or wounding can trigger cellular pluripotency acquisition,various other envi... 详细信息

关键词： wound al. subsequent

Usefulness of contrast-enhanced ultrasonography in determining treatment efficacy and outcome after pancreatic cancer chemotherapy

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World Journal of Gastroenterology 2008年第47期14卷 7183-7191页

作者： atsushi Sofuni Takao Itoi Fumihide Itokawa Takayoshi Tsuchiya Toshio Kurihara Kentaro Ishii Syujiro Tsuji Nobuhito ikeuchi Fuminori Moriyasu Department of Gastroenterology and Hepatology Tokyo Medical UniversityTokyo 160-0023Japan

AIM:To investigate if contrast-enhanced ultrasonography(CE-US) is useful for determining treatment efficacy and outcome in the early stages of pancreatic cancer chemotherapy by assessing changes in intratumor hemodynamics using CE-US with a contrast ***:The subjects were 34 patients with unresectable advanced pancreatic cancer treated by ***-US was assessed after every treatment(course) completion under the same conditions,and patients were divided into two groups according to the intratumor enhancement pattern:Vascular rich(R) group and vascular poor(P) ***:After the second course of treatment,R group in intratumor hemodynamics had 18 patients,and P group had 16 *** reduction rates of serum CA19-9 level after chemotherapy which decreased to half or less of the baseline level were 2/15(0.1%) in P group,but 11/16(69%) in R group(P = 0.006).When the mean number of courses of chemotherapy and outcome were compared,P group had a mean number of courses of 4.9(R group,10.2) and mean survival time(MST) of 246 d(R group,402 d),showing that outcome was significantly better in R group(P=0.006).CONCLUSION:CE-US revealed that the change in intratumor blood flow correlated with both serum CA19-9 level and *** with serum CA19-9 that decreased to less than half the baseline level,and patients with an abundant intratumor blood flow,had a significantly better ***,CE-US is potentially useful for evaluating treatment efficacy and outcome in the early stages of pancreatic cancer chemotherapy.

关键词： Pancreatic cancer Chemotherapy Gemcitabine Contrast-enhanced ultrasonography Outcome

Endoscopic ultrasound-guided choledochoduodenostomy in patients with failed endoscopic retrograde cholangiopancreatography

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World Journal of Gastroenterology 2008年第39期14卷 6078-6082页

作者： Takao Itoi Fumihide Itokawa atsushi Sofuni Toshio Kurihara Takayoshi Tsuchiya Kentaro Ishii Shujiro Tsuji Nobuhito ikeuchi Fuminori Moriyasu Department of Gastroenterology and Hepatology Tokyo Medical University HospitalTokyo 160-0023Japan

Endoscopic ultrasonography （EUS）-guided biliary drainage was performed for treatment of patients who have obstructive jaundice in cases of failed endoscopic retrograde cholangiopancreatography （ERCP）. In the present study, we introduced the feasibility and outcome of EUS-guided choledochoduodenostomy in four patients who failed in ERCR We performed the procedure in 2 papilla of Vater, including one resectable case, and 2 cases of cancer of the head of pancreas. Using a curved linear array echoendoscope, a 19 G needle or a needle knife was punctured transduodenally into the bile duct under EUS visualization. Using a biliary catheter for dilation, or papillary balloon dilator, a 7-Fr plastic stent was inserted through the choledochoduodenostomy site into the extrahepatic bile duct. In 3 （75%） of 4 cases, an indwelling plastic stent was placed, and in one case in which the stent could not be advanced into the bile duct, a naso-biliary drainage tube was placed instead. In all cases, the obstructive jaundice rapidly improved after the procedure. Focal peritonitis and bleeding not requiring blood transfusion was seen in one case. In this case, pancreatoduodenectomy was performed and the surgical findings revealed severe adhesion around the choledochoduodenostomy site. Although further studies and development of devices are mandatory, EUS-guided choledochoduodenostomy appears to be an effective alternative to ERCP in selected cases.

关键词： Endoscopic ultrasonography-guided fine needle aspiration Biliary drainage Endoscopic retrograde cholangiopancreatography

Transpapillary incision of refractory circumscript pancreatic duct stricture using wire-guided snare forceps

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World Journal of Gastroenterology 2010年第12期16卷 1541-1544页

作者： Takao Itoi atsushi Sofuni Fumihide Itokawa Toshio Kurihara Takayoshi Tsuchiya Kentaro Ishii Shujiro Tsuji Nobuhito ikeuchi Fuminori Moriyasu Department of Gastroenterology and Hepatology Tokyo Medical University

Endoscopic therapy of pancreatic duct(PD)strictures using balloon dilation and pancreatic duct stent(PS) placement has been reported to improve the severity of abdominal pain in selected patients with chronic pancreatitis(CP).However,some strictures are refractory and require frequent PS exchange to control *** describe two cases of successful endoscopic PD incision for difficult PD stricture using a wireguided *** snare is partially opened within the strictured pancreatic duct while applying current,thus incising the *** both cases were successful without complications we do not advocate that this method be used routinely because of the potential for severe complications,***,ductal perforation or pancreatic parenchymal *** order to prevent these complications,we developed a wire-guided technique under fluoroscopic *** think this procedure may be useful in patients with short,straight PD *** further study is required,this approach may have potential for selected patients with refractory PD strictures due to CP.

关键词： Chronic pancreatitis Pancreatic duct stricture Pancreatic duct incision

Endoscopic removal and trimming of distal self-expandable metallic biliary stents

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World Journal of Gastroenterology 2011年第21期17卷 2652-2657页

作者： Kentaro Ishii Takao Itoi atsushi Sofuni Fumihide Itokawa Takayoshi Tsuchiya Toshio Kurihara Shujiro Tsuji Nobuhito ikeuchi Junko Umeda Fuminori Moriyasu Akihiko Tsuchida Department of Gastroenterology and Hepatology Tokyo Medical University Third Department of Surgery Tokyo Medical University

AIM:To evaluate the efficacy and safety of endoscopic removal and trimming of self-expandable metallic stents(SEMS).METHODS:All SEMS had been placed for distal biliary ***-seven endoscopic procedures were performed in 19 patients in whom SEMS(one uncovered and 18 covered) removal had been attempted,and 8 patients in whom stent trimming using argon plasma coagulation(APC) had been attempted at Tokyo Medical University *** APC settings were:voltage 60-80 W and gas flow at 1.5 L/***:The mean stent indwelling period for all patients in whom stent removal had been attempted was 113.7 ± 77.6 d(range,8-280 d).Of the 19 patients in whom removal of the SEMS had been attempted,the procedure was successful in 14(73.7%) without procedure-related adverse *** indwelling period in the stent removable group was shorter than that in the unremovable group(94.9 ± 71.5 d vs 166.2 ± 76.2 d,P = 0.08).Stent trimming was successful for all patients with one minor adverse event consisting of self-limited *** time ranged from 11 to 16 ***:Although further investigations on larger numbers of cases are necessary to accumulate evidence,the present data suggested that stent removal and stent trimming is feasible and effective for stent-related complications.

关键词： Self-expandable metallic stent Endoscopic biliary stenting Endoscopic stent removal Endoscopic stent trimming

Prognosis of cancer with branch duct type IPMN of the pancreas

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World Journal of Gastroenterology 2010年第15期16卷 1890-1895页

作者： Nobuhito ikeuchi Takao Itoi atsushi Sofuni Fumihide Itokawa Takayoshi Tsuchiya Toshio Kurihara Kentaro Ishii Shujiro Tsuji Junko Umeda Fuminori Moriyasu Akihiko Tsuchida Kazuhiko Kasuya Department of Gastroenterology and Hepatology Tokyo Medical University Department of Surgery Tokyo Medical University

AIM:To examine the coexistence of metachronous and synchronous cancer in branch duct intraductal papillary mucinous neoplasms of the pancreas (IPMN).METHODS: We reviewed the records of 145 patients with branch duct IPMN between January 1991 and April 2008 and assessed the relationship between IPMN and intraor extra-pancreatic carcinoma and the outcome of ***: The mean observation period was 55.9 ± 45.3 mo. Among the 145 patients, the frequency of extra-pancreatic cancer was 29.0%. The frequency of gastric cancer, colon cancer, breast cancer, and pan-creatic cancer were 25.5%, 15.7%, 13.7%, and 9.8%, respectively. Twenty (13.8%) of the patients died. The cause of death was extra-pancreatic carcinoma in 40%,pancreatic cancer in 25%, IPMN per se in 20%, and benign disease in 15% of the ***: The prognosis for IPMN depends not on the IPMN per se, but on the presence of intraor extra-pancreatic cancer.

关键词： Intraductal papillary mucinous neoplasms of the pancreas Long-term follow-up Extra-pancreatic cancer Pancreatic cancer Prognosis

Color Restoration Method Based on Spectral Information Using Normalized Cut

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International Journal of Automation and computing 2008年第3期5卷 226-233页

作者： Tetsuro Morimoto Tohru Mihashi Katsushi ikeuchi Institute of Industrial Science University of TokyoKoganei Information Technology Research Laboratory Corporate R&D Division Toppan Printing Co.Ltd.

This paper proposes a novel method for color restoration that can effectively apply accurate color based on spectral information to a segmented image using the normalized cut technique. Using the proposed method, we can obtain a digital still camera image and spectral information in different environments. Also, it is not necessary to estimate reflectance spectra using a spectral database such as other methods. The synthesized images are accurate and high resolution. The proposed method effectively works in making digital archive contents. Some experimental results are demonstrated in this paper.

关键词： Spectral information normalized cut digital archive contents digital still camera (DSC) spectrometer.

Real-time virtual sonography visualization and its clinical application in biliopancreatic disease

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World Journal of Gastroenterology 2013年第42期19卷 7419-7425页

作者： atsushi Sofuni Takao Itoi Fumihide Itokawa Takayoshi Tsuchiya Toshio Kurihara Kentaro Ishii Syujiro Tsuji Nobuhito ikeuchi Reina Tanaka Junko Umeda Ryosuke Tonozuka Mitsuyoshi Honjo Shuntaro Mukai Fuminori Moriyasu Department of Gastroenterology and Hepatology Tokyo Medical UniversityTokyo 160-0023Japan

AIM:To evaluate the usefulness of real-time virtual sonography(RVS)in biliary and pancreatic ***:This study included 15 patients with biliary and pancreatic *** can be used to observe an ultrasound image in real time by merging the ultrasound image with a multiplanar reconstruction computed tomography(CT)image,using pre-scanned CT volume *** ultrasound used was EUB-8500with a convex probe *** RVS images were evaluated based on 3 levels,namely,excellent,good and poor,by the displacement in ***:By combining the objectivity of CT with free scanning using RVS,it was possible to easily interpret the relationship between lesions and the surrounding organs as well as the position of vascular *** resulting evaluation levels of the RVS images were12 excellent(pancreatic cancer,bile duct cancer,cholecystolithiasis and cholangiocellular carcinoma)and 3 good(pancreatic cancer and gallbladder cancer).Compared with conventional B-mode ultrasonography and CT,RVS images achieved a rate of 80%superior visualization and 20%better ***:RVS has potential usefulness in objective visualization and diagnosis in the field of biliary and pancreatic diseases.

关键词： Biliary and pancreatic disease Computed tomography-multiplanar reconstruction image Navigation Real-time ultrasound image Real-time virtual sonography

Diverse Chromatic Acclimation Processes Regulating Phycoerythrocyanin and Rod-Shaped Phycobilisome in Cyanobacteria

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Molecular Plant 2019年第8期12卷 715-725页

作者： Yuu Hirose Song Ghihong Mai Watanabe Chinatsu Yonekawa Kazuyoshi Murata Masahiko ikeuchi Toshihiko Eki Department of Environmental and Life Sciences Toyohashi University of Technology1-1 HibarigaokaTempakuToyohashiAichi 441-8580Japan National Institute for Physiological Sciences(NIPS) 38 NishigonakaMyodaijiOkazakiAichi 444-8585Japan Department of Life Sciences(Biology) The University of Tokyo3-8-1 KomabaMeguroTokyo 153-8902Japan

Cyanobacteria have evolved various photoacclimation processes to perform oxygenic photosynthesis under different light *** acclimation(CA)is a widely recognized and ecologically important type of photoacclimation,whereby cyanobacteria alter the absorbing light colors of a supermolecular antenna complex called the *** date,several CA variants that regulate the green-absorbing phycoerythrin(PE)and/or the red-absorbing phycocyanin(PC)within the hemi-discoidal form of phycobilisome have been *** this study,we identified a unique CA regulatory gene cluster encoding yellow-green-absorbing phycoerythrocyanin(PEC)and a rod-membrane linker protein(CpcL)for the rod-shaped form of *** the cyanobacterium Leptolyngbya *** 6406,we revealed novel CA variants regulating PEC(CA7)and the rod-shaped phycobilisome(CAO),which maximize yellowgreen light-harvesting capacity and balance the excitation of photosystems,respective!*** of the distribution of CA gene clusters in 445 cyanobacteria genomes revealed eight CA variants responding to green and red light,which are classified based on the presence of PEC,PE,cpcL,and CA photosensor *** analysis further suggested that the emergence of CA7 was a single event and preceded that of heterocystous strains,whereas the acquisition of CAO occurred multiple *** together,these results offer novel insights into the diversity and evolution of the complex cyanobacterial photoacclimation mechanisms.

关键词： cyanobacteria chromatic acclimation cyanobacteriochrome phycobilisome phycoerythrocyanin

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