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256层螺旋Ct低剂量对比剂低管电压高管电流扫描方案在肾功能衰竭病人腹部动态增强扫描中的临床应用

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国际医学放射学杂志 2012年第1期 72-73页

作者： t.nakaura K.Awai N.Maruyama N.takata I.Yoshinaka K.Harada 李琼 Department of Diagnostic Radiology Amakusa Medical CenterKameba 854-1AmakusaKumamoto 863-0046Japan

目的探讨256层螺旋Ct低剂量对比剂低管电压高管电流腹部动态增强扫描方案的临床应用的可行性。材料与方法本前瞻性研究获机构审查委员会批准,并获得了病人的知情同意书。此研究共纳入151例病人,其中估算肾小球滤过率(eGFR)大于或等于60m... 详细信息

目的探讨256层螺旋Ct低剂量对比剂低管电压高管电流腹部动态增强扫描方案的临床应用的可行性。材料与方法本前瞻性研究获机构审查委员会批准,并获得了病人的知情同意书。此研究共纳入151例病人,其中估算肾小球滤过率(eGFR)大于或等于60mL·min-1·1.73m-2的117例

关键词：扫描方案低剂量对比剂低管电压管电流肾功能衰竭肾衰肾疾病螺旋动态增强扫描病人腹部躯干临床应用 Ct

多期双能Ct对肝纤维化的评估:碘摄取参数的诊断性能

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国际医学放射学杂志 2021年第5期 613-613页

作者： Y.Nagayama Y.Kato t.Inoue t.nakaura S.Oda M.Kidoh 陈小倩

摘要目的评估肝脏Ct多期增强扫描摄碘参数预测肝纤维化的能力,并比较绝对强化值(ΔHU)与双能量碘密度(ID)2种方法的差异性。方法回顾性纳入了2017年1月—

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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

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

与3D tSE相比,3.0t MR胰胆管成像的GRASE序列能改善影像质量和采集时间吗?

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国际医学放射学杂志 2018年第4期 496-496页

作者： M.Yoshida t.nakaura t.Inoue S.tanoue S.takada D.Utsunomiya 周佳莹 Department of Radiology Amakusa Medical Center

目的本研究评估了3.0 t MR单次屏气的梯度自旋回波(GRASE)序列在胆胰管成像(MRCP)的临床应用价值。将GRASE和呼吸导航触发的3D快速自旋回波(3D tSE)的采集时间和影像质量进行比较。方法采用GRASE和3D tSE连续检查了54例行MRCP的病人。... 详细信息

目的本研究评估了3.0 t MR单次屏气的梯度自旋回波(GRASE)序列在胆胰管成像(MRCP)的临床应用价值。将GRASE和呼吸导航触发的3D快速自旋回波(3D tSE)的采集时间和影像质量进行比较。方法采用GRASE和3D tSE连续检查了54例行MRCP的病人。比较了胆总管(CBD)和肝脏的影像采集时间和对比噪声比(CNR)。由2位放射科医师用4分度表对整体影像质量、模糊、运动伪影和CBD可见度进行评分。采用配对t检验比较数据变量。结果GRASE平均影像采集时间为3D tSE的95%(GRASE:20 s;3D tSE:6 min 27 s)。GRASE的CNR显著高于3D tSE(GRASE:25.4±13.9与3D tSE:18.2±9.6,PtSE。结论单次屏气的GRASE序列的3.0 t MRCP改善了CBD的CNR,且较常规3D tSE的MRCP的采集时间缩短了95%。

关键词：采集时间 tSE GRASE 影像质量 MR

心血管MRI的心肌t1 mapping成像用于检测和量化家族性淀粉样多神经病变的心脏受累情况

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国际医学放射学杂志 2018年第1期 112-112页

作者： S.Oda D.Utsunomiya K.Morita t.nakaura H.Yuki M.Kidoh 崔倩 Faculty of Life Sciences Department of Diagnostic RadiologyKumamoto University

摘要目的探讨非增强的t1mapping能否用于检测和量化家族性淀粉样多神经病变(FAP)的心脏受累情况。方法FAP的日本病人41例,年龄(53.2±13.9)岁,基因型

关键词：心脏受累 FAP

肾上腺腺瘤与转移瘤:双源能谱Ct虚拟非对比成像和碘图的诊断效能

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国际医学放射学杂志 2020年第5期 615-615页

作者： Y.Nagayama t.Inoue S.Oda S.tanoue t.nakaura O.Ikeda 刘思睿 Department of Diagnostic Radiology Graduate School of Medical Sciences Kumamoto University

摘要双源能谱Ct可以从对比剂增强检查中进行虚拟非对比(VNC)衰减和碘密度测量,从而有可能确定肾上腺病变的特征。但有关其诊断效能的数据仍然有限,而且从未对

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