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MR弹性成像测量肝脏硬度作为肝细胞肝癌的一个危险因子:一项初步病例对照研究

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国际医学放射学杂志 2013年第2期 186-187页

作者： U. Motosugi t. ichikawa t. Koshiishi K. Sano H. Morisaka S. ichikawa 孙珊珊 Department of Radiology University of Yamanashi1110 Shimokato Chuo-shiYamanashi-ken 409-3898 Japan

目的检验用MR弹性成像(MRE)测量的肝脏硬度是否可作为慢性肝病病人发生肝细胞肝癌(HCC)的一个危险因子。方法通过回顾MR检查记录,筛选了301例有慢性肝病但此前临床无HCC病史的病人。所有病人均行MRE检查和钆塞酸增强MR成像。301例中共... 详细信息

目的检验用MR弹性成像(MRE)测量的肝脏硬度是否可作为慢性肝病病人发生肝细胞肝癌(HCC)的一个危险因子。方法通过回顾MR检查记录,筛选了301例有慢性肝病但此前临床无HCC病史的病人。所有病人均行MRE检查和钆塞酸增强MR成像。301例中共有66例的MR影像上检出HCC,将其与余下无HCC的病人中选出的对照组按年龄匹配。通过采集由肝脏的空气振动产生并由圆柱状被动驱动器传输的可视弹性波进行MRE检查。HCC进展的危险因子取决于逻辑回归分析的优势比、性别、MRE测得的肝脏硬度、天冬氨酸转移酶、丙氨酸转移酶、甲胎蛋白和维生素K缺乏诱导蛋白Ⅱ的血清水平。结果多变量分析显示只有MRE测得的肝脏硬度为HCC的有意义的危险因子,其优势比(95%可信区间)为1.38(1.05～1.84)。结论在患有慢性肝病的病人中,MRE检查测得的肝脏硬度是HCC的一个独立的危险因子。要点①MR弹性成像可评估肝脏纤维化的标志物———肝脏硬度。②肝脏硬度是HCC的一个独立的危险因子。③对HCC来说,肝脏硬度似乎是比肿瘤标志物更好的指标。

关键词： MRI 弹性成像慢性肝病肝细胞肝癌危险因子

Energy exchange between charged relativistic fluids in f(t) gravity

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Communications in theoretical Physics 2024年第10期76卷 108-120页

作者： Z Yousaf U A Khokhar Nasser Bin turki t Suzuki Department of Mathematics University of the Punjab Quaid-i-Azam Campus Department of Mathematics College of Science King Saud University Department of Regional Management Faculty of Management Fukushima College

this study focuses on the effects of a polytropic fluid on a charged gravitational source within f(t) gravity, where t is the torsion scalar. We investigate how the electromagnetic field affects the flow of energy in spherically symmetric and static celestial objects that contain relativistic fluids. By using the gravitational decoupling technique, we analyze the effects of polytropic fluid on the dynamics of the gravitational source, accompanied by the matching of the interior geometry with an exterior at the hypersurface Σ. Finally, with the help of the tolman ⅡV solution, we observe the conduct of energy conditions with the existence of charge using f(t)field equations and got the intended outcomes.

关键词： anisotropy complexity energy exchange hydrodynamics self-gravitating systems

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齿轮泵的困油研究

机床与液压 1988年第5期 50-56页

作者： Yanad H ichikawa t Itsuji Y 李运华冯广杰

在齿轮泵中,常在侧板上开卸荷槽以避免困油,卸荷槽的位置对齿轮泵的性能有很大的影响。然而,关于卸荷槽的位置还未给出一个确定的设计准则。为了确定卸荷槽的位置,必须弄清楚齿轮泵工作中的困油现象。在本研究中,用一个特制的固定侧板... 详细信息

在齿轮泵中,常在侧板上开卸荷槽以避免困油,卸荷槽的位置对齿轮泵的性能有很大的影响。然而,关于卸荷槽的位置还未给出一个确定的设计准则。为了确定卸荷槽的位置,必须弄清楚齿轮泵工作中的困油现象。在本研究中,用一个特制的固定侧板型外啮合齿轮泵作被试件,通过其上安装的半导体型压力传感器测量了主动齿轮和从动齿轮所形成的困油区中的压力。试验揭示了卸荷槽的位置和侧隙尺寸对困油区中的压力上升幅值和泵的性能的影

关键词：困油侧隙压力上升开口面积卸荷槽齿轮泵回转式容积泵闭死容积

对肝硬化病人乏血供肝内结节钆酸阳性摄取的研究

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国际医学放射学杂志 2017年第2期 236-237页

作者： K.Sano t.ichikawa U.Motosugi S.ichikawa H.Morisaka N.Enomoto 徐滢莹 Department of Radiology University of Yamanashi

摘要目的评估肝硬化病人肝细胞特异期钆酸摄取阳性(高信号)的乏血供肝内结节发展为富血供肝细胞肝癌(HCC)的纵向风险。方法在69例病人中连续随访评估633

关键词：肝硬化内结节供肝病人阳性

Evaluation of periglacial landforms and formation of soil properties on the Mount Honaz,SW türkiye

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Journal of Mountain Science 2024年第9期21卷 3047-3067页

作者： SERİN Soner UNCU Levent DEDE Volkan tÜRKEŞMurat Institute of Social Sciences İstanbul Universityİstanbul 34119Türkiye Department of Geography BilecikŞeyh Edebali UniversityBilecik 11234Türkiye Department of Geography Ardahan UniversityArdahan 75002Türkiye Center for Climate Change and Policy Studies Boğaziçi Universityİstanbul 34342Türkiye

the main aim of this study is to explain periglacial processes on the summits of Mount Honaz(2571 m a.s.l.),define periglacial landforms,and determine the relationships between morphometric features and topographic *** circles,stony earth circles,non sorted steps,and non sorted stripes were identified on the summits of Mount ***'s correlation coefficient(r)and linear regression analyses were performed by taking metric measurements from 125 periglacial landforms to describe their morphometric features(length,width,height)of periglacial landforms and explain the relationships between them and topographic factors(elevation,slope).to explain the relationships between periglacial landforms and soil properties,soil samples from 11 periglacial landforms were taken and *** landforms,which continue to develop on the summits of Mount Honaz today,have been evaluated with present climate *** of soil samples indicates a notable impact of parent material on the genesis of periglacial *** high ratio of organic matter in mud circle and non sorted step landforms and the high lime ratio in stony earth circle landforms prove a strong relationship between the formation mechanisms of landforms and the soil ***,it is consistent with the findings obtained from the analysis that severe periglacial processes and washing and scavenging events are experienced more on the northern slopes.

关键词： Periglacial processes and geomorphology Soil analysis Morphometric analysis Mount Honaz türkiye

Preparation of microparticles and nanoparticles using membrane-assisted dispersion,micromixing,and evaporation processes

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Particuology 2024年第1期84卷 30-44页

作者： Goran t.Vladisavljevic Chemical Engineering Department Loughborough UniversityLoughboroughLeicestershire LE113TUUnited Kingdom

Synthetic microporous membranes are increasingly used for energy-efficient and controlled production of micro-and nanoparticles and micro-and nanoemulsions with tuneable morphology and physico-chemical properties through various micromixing,emulsification,and evaporation *** emul-sification processes,the membrane pores are used for dispersed phase injection and size-controlled generation of droplets and droplet-templated *** micromixing processes,membrane is utilised as a micromixer for mixing two miscible liquids,usually solvent and antisolvent-rich solutions,which leads to the creation of supersaturation and subsequent nanoprecipitation or *** mem-brane evaporation processes,membrane is used to prevent phase dispersion while allowing efficient molecular diffusion of solvent and/or antisolvent vapour through gas-filled *** dispersion processes can be operated continuously by decoupling shear stress on the membrane surface from cross flow using tube insets,flow pulsations,swirling flow,membrane oscillations or membrane *** generation and solidification can be performed continuously in a single pass by connecting membrane module with a downstream *** dispersion processes can be used for pro-duction of nanoparticles such as nanovesicles(liposomes,micelles,ethosomes,and niosomes),nanogels,polymeric,lipid and metallic nanoparticles,and *** main advantages of membrane-assisted particle generation are in low energy consumption,controlled geometry and hydrodynamic conditions at the microscale level,flexible throughput due to modular and scalable design of membrane devices,and a wide choice of available microporous membranes with various wall porosities,wetta-bilities,pore sizes,and pore morphologies to suit different applications.

关键词： Nanoparticles Microparticles Nanoemulsions Microemulsions Microporous membrane Crystallisation Flash nanoprecipitation Emulsification Zero liquid discharge

Late Ordovician Mass Extinction: Earth, fire and ice

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National Science Review 2024年第1期11卷 51-65页

作者： David A.t.Harper Palaeoecosystems Group Department of Earth SciencesDurham University

the Late Ordovician Mass Extinction was the earliest of the ‘big’ five extinction events and the earliest to affect the trajectory of metazoan life. two phases have been identified near the start of the Hirnantian period and in the middle. It was a massive taxonomic extinction, a weak phylogenetic extinction and a relatively benign ecological extinction. A rapid cooling, triggering a major ice age that reduced the temperature of surface waters, prompted a drop in sea level of some 100 m and introduced toxic bottom waters onto the shelves. these symptoms of more fundamental planetary processes have been associated with a range of factors with an underlying driver identified as volcanicity. Volcanic eruptions, and other products, may have extended back in time to at least the Sandbian and early Katian, suggesting the extinctions were more protracted and influential than hitherto documented.

关键词： Ordovician LOME paleoecology palaeobiogeography biotas

确定肝脏动态Ct扫描碘剂量最优体型指数的一项前瞻性多中心研究

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国际医学放射学杂志 2016年第3期 302-303页

作者： K.Awai M.Kanematsu t.Kim t.ichikawa Y.Nakamura A.Nakamoto 方晓堃 Department of Diagnostic Radiology Institute of Biomedical and Health SciencesHiroshima University

摘要目的在一项大样本的多中心研究中,确定肝脏动态Ct扫描中体型参数和主动脉及肝脏强化的最佳关系。材料与方法这项前瞻性经过了所有31家参与机构的研究伦理委员会的批准,在2012年4月—2013年9月期间共纳入1 342例病人。每例病人均提... 详细信息

摘要目的在一项大样本的多中心研究中,确定肝脏动态Ct扫描中体型参数和主动脉及肝脏强化的最佳关系。材料与方法这项前瞻性经过了所有31家参与机构的研究伦理委员会的批准,在2012年4月—2013年9月期间共纳入1 342例病人。每例病人均提供书面或口头知情同意。所有病人均接受了肝脏动态Ct检查,包括平扫、肝动脉期(HAP)和

关键词：肝脏主动脉体型参数大动脉多中心研究多元线性回归分析 Ct

钆喷替酸葡甲胺增强MRI鉴别肝脏富血供假性病变与富血管肝细胞癌

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国际医学放射学杂志 2010年第5期 473-474页

作者： U.Motosugi t.ichikawa K.Sano L.tominaga A.Muhi 罗伟 Department of Radiology University of Yamanashi