检索结果-南通市图书馆

Motility index measured by magnetic resonance enterography is associated with sex and mural thickness

World Journal of Gastroenterology 2020年第36期26卷 5484-5497页

作者： Sven Mansson olle ekberg Bodil Ohlsson Medical Radiation Physics Department of Translational MedicineLund UniversitySkåne University Hospital MalmöMalmö20502Sweden Department of Translational Medicine Diagnostic RadiologyLund UniversitySkåne University HospitalMalmö20502Sweden Department of Internal Medicine Skåne University HospitalLund UniversityMalmöS-20502Sweden

BACKGROUND Recently,a technique has been developed to use magnetic resonance enterography(MRE)for the evaluation of small bowel *** hypothesis was that assessment of the motility index(MI)should reflect differences in motility between clinical *** To aim of the present observational,cross-sectional study was to evaluate the use of the MI in daily clinical *** All consecutive patients aged 18-70 years who were referred for MRE at the Department of Radiology during a 2-year period were asked to *** volunteers were included as *** was prepared and conducted in accordance with clinical *** the day of examination,all the participants had to complete the visual analog scale for irritable bowel syndrome(IBS)and IBS-symptom severity *** of MI were calculated from dynamic MR *** was used to evaluate differences in MI between groups,classified as healthy,Crohn’s disease,ulcerative colitis,IBS,other assorted disorders and *** and linear regression were applied to the MI *** medical records were scrutinized for medical *** In all,224 examinations were included(inclusion prevalence 76.3%),with 22 controls and 202 *** was a significant difference in the MI of the jejunum(P=0.021)and terminal ileum(P=0.007)between the different *** MI was inversely associated with the mural thickness of the terminal ileum in men(P<0.001)and women(P=0.063)after adjustments,and tended to be lower in men than in women(P=0.056).Subjectively observed reduction of motility on MRI was accomplished by reduced MI of terminal ileum in men(P<0.001)and women(P=0.030).In women,diarrhea was inversely associated with the MI of the jejunum(P=0.029),and constipation was positively associated with the MI of the terminal ileum(P=0.039).CONCLUSION Although MIs differ across diseases,a lower MI of the terminal ileum is mainly associated with male sex and an increased mural thickness.S

关键词： Dysmotility Gastrointestinal symptoms Magnetic resonance enterography Motility index Mural thickness Small bowel

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Impact of Field Strength and Respiratory Motion Control on Diffusion-Weighted MR Imaging of the Liver

引用

Open Journal of Medical Imaging 2013年第1期3卷 31-39页

作者： Johanna Berg Sven Mansson Jonas Svensson olle ekberg Markus F.Müller Skane University Hospital Department of Clinical SciencesLund UniversityMalmoSweden Medical Radiology Lund UniversityMalmoSweden Medical Radiation Physics Lund UniversityMalmoSweden

Purpose: To evaluate the impact of field strength and respiratory motion control on diffusion-weighted MR imaging (DWI) of the liver at 1.5 and 3 T. Material and Methods: Three DWI sequences using seven b-values from 20 - 400 s/mm2 were designed with identical parameters but with different handling of respiratory motion [respiratory triggered (RT), free breathing (FB), breath hold (BH)] on 3 T and 1.5 T. Thirteen volunteers were examined at a 3 T and six of them also at a 1.5 T magnet. DW images were analyzed quantitatively and qualitatively. Regions of interest were placed in cranial, middle and caudal parts of the right liver lobe (RLL) and ADC and SNR were calculated. Results: ADC in RLL tended to be lower at 3 T MRI. Least inter-subject ADC variability was found with RT in the middle RLL at 3 T. Highest ADCs were found caudally in the RLL. Significant differences in ADC between middle and caudal RLL were calculated in FB and RT at 3 T and FB and BH at 1.5 T, respectively. No significant difference in SNR was found between 3 T and 1.5 T. There were significantly more artifacts in the left liver lobe (LLL) compared to the RLL in all sequences and in the LLL at 3 T compared to 1.5 T. Conclusion: Our study suggests that longitudinal hepatic ADC measurements should be performed using equivalent field strength, b-values, and acquisition technique, given influence of these factors on ADC measurements.

关键词： Magnetic Resonance Imaging Diffusion Echo-Planar Imaging 3 T Liver Respiratory Motion

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Multimodal cardiovascular imaging : principles and clinical applications / olle Pahlm, Galen S. Wagner, [editors].

引用

2011年

作者： olle Pahlm Galen S. Wagner [editors].

来源：畅想之星图书光盘版（南... 评论

在线全文

畅想之星图书光盘版（南通市图书馆镜像）

学校读者我要写书评

暂无评论

The origin of the lattice thermal conductivity enhancement at the ferroelectric phase transition in GeTe

引用

npj Computational Materials 2021年第1期7卷 529-536页

作者： Đorđe Dangić olle Hellman Stephen Fahy Ivana Savić Department of Physics University College CorkCorkIreland Tyndall National Institute CorkIreland Department of Physics Chemistry and Biology(IFM)Linköping UniversityLinköpingSweden

The proximity to structural phase transitions in IV-VI thermoelectric materials is one of the main reasons for their large phonon anharmonicity and intrinsically low lattice thermal conductivityκ.However,theκof GeTe increases at the ferroelectric phase transition near 700 *** first-principles calculations with the temperature dependent effective potential method,we show that this rise inκis the consequence of negative thermal expansion in the rhombohedral phase and increase in the phonon lifetimes in the high-symmetry *** anharmonicity near the phase transition induces non-Lorentzian shapes of the phonon power *** account for these effects,we implement a method of calculatingκbased on the Green-Kubo approach and find that the Boltzmann transport equation underestimatesκnear the phase *** findings elucidate the influence of structural phase transitions onκand provide guidance for design of better thermoelectric materials.

关键词： phase transition ferroelectric

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Enhanced Recovery After Surgery and the ERAS® Society

引用

Journal of Pancreatology 2019年第3期2卷 65-68页

作者： Ljungqvist olle Department of Surgery Faculty of Medicine and HealthSchool of Health and Medical SciencesÖrebro UniversityÖrebroSweden

This is a short review of the development of Enhanced Recovery After Surgery and the role that the ERAS® Society has *** covers the history in short,the guideline work from the society and implementation of the guidelines,as well as the philosophy and physiology behind ERAS and finally also some ideas around the future and the development of research collaboration.

关键词： Enhanced Recovery After Surgery Guidelines Implementation Surgical stress Team work

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

引用

Asian Journal of Andrology 2014年第1期16卷 50-59页

作者： Konstantin Svechnikov Jan-Bernd Stukenborg Iuliia Savchuck olle Sider Department of Women's and Children's Health Paediatric Endocrinology Unit Karolinska Institutet and University Hospital Stockholm Sweden

During the past few decades, scientific evidence has been accumulated concerning the possible adverse effects of the exposure to environmental chemicals on the well-being of wildlife and human populations. One large and growing group of such compounds of anthropogenic or natural origin is referred to as endocrine-disrupting chemicals （EDCs）, due to their deleterious action on the endocrine system. This concern was first focused on the control of reproductive function particularly in males, but has later been expanded to include all possible endocrine functions. The present review describes the underlying physiology behind the cascade of developmental events that occur during sexual differentiation of males and the specific role of androgen in the masculinization process and proper organogenesis of the external male genitalia. The impact of the genetic background, environmental exposures and lifestyle factors in the etiology of hypospadias, cryptorchidism and testicular cancer are reviewed and the possible role of EDCs in the development of these reproductive disorders is discussed critically. Finally, the possible direct and programming effects of exposures in utero to widely use therapeutic compounds, environmental estrogens and other chemicals on the incidence of reproductive abnormalities and poor semen quality in humans are also highlighted.

关键词： endocrine disrupters male (in)fertility reproductive disorders testis testicular steroidogenesis

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Development of polymer–fullerene solar cells

引用

National Science Review 2016年第2期3卷 222-239页

作者： Fengling Zhang olle Ingans Yinhua Zhou Koen Vandewal Biomolecular and organic electronics Department of PhysicsChemistry and Biology(IFM)Linkoping University Wuhan National Laboratory for Optoelectronics Huazhong University of Science and Technology Institut fr Angewandte Photophysik Technische Universitt Dresden

Global efforts and synergetic interdisciplinary collaborations on solution-processed bulk-heterojunction polymer solar cells(PSCs or OPVs) made power conversion efficiencies over 10%*** rapid progress of the field is credited to the synthesis of a large number of novel polymers with specially tunable optoelectronic properties,a better control over the nano-morphology of photoactive blend layers,the introduction of various effective interfacial layers,new device architectures and a deeper understanding of device *** will review the pioneering materials for polymer-fullerene solar cells and trace the progress of concepts driving their *** discuss the evolution of morphology control,interfacial layers and device structures fully exploring the potential of photoactive *** order to guide a further increase in power conversion efficiency of OPV,the current understanding of the process of free charge carrier generation and the origin of the photovoltage is summarized followed by a perspective on how to overcome the limitations for industrializing PSCs.

关键词： polymer-fullerene solar cells electron donors and acceptors morphology interfacial layer device physics

来源：

同方期刊数据库评论

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

几丁虫研究现状及展望

引用

古生物学报 2023年第3期62卷 436-450页

作者：梁艳唐鹏 olle Hints Jaak Nolvak 张琳娜陈焱森现代古生物学和地层学国家重点实验室中国科学院南京地质古生物研究所南京210008 Department of Geology Tallinn University of TechnologyTallinn 19086Republic of EstoniaRepublic of Estonia

几丁虫是古生代海洋中一类重要的微体生物化石,迄今已有近百年的研究历史。作为一类有效的生物地层工具,几丁虫在奥陶纪和志留纪生物地层研究中发挥着重要作用,为早古生代油气-矿产资源勘探提供可靠的地层对比资料,还为一些重大地质-环... 详细信息

几丁虫是古生代海洋中一类重要的微体生物化石,迄今已有近百年的研究历史。作为一类有效的生物地层工具,几丁虫在奥陶纪和志留纪生物地层研究中发挥着重要作用,为早古生代油气-矿产资源勘探提供可靠的地层对比资料,还为一些重大地质-环境-生物事件的全球对比提供可靠依据,特别是那些缺乏笔石和牙形类的地层。然而,随着现代古生物学的快速发展以及几丁虫资料的不断积累,几丁虫研究目前正遭遇着瓶颈期,主要体现在:(1)受制于有限的技术手段及尚未形成规范的研究标准,不少早期建立的几丁虫分类单元存在着明显的问题,如描述简单、展示标本过少、光学显微成像无法很好地揭示壳表的形态特征等,使得后期相关属种的鉴定存在争议;(2)在全球古生物数据不断被数字化和可视化的进程中,几丁虫相关工作进展迟缓。目前尚未能对全球的几丁虫数据进行有效汇总,影响了几丁虫宏演化及生物地层学研究,同时也使得几丁虫古生物地理学与古生态学这类薄弱研究环节一直未能形成突破;(3)几丁虫的生物学属性近来虽有进展,但仍有争论,亟待寻求新的证据及思路以解决这一问题。为了能有效地解决这些问题,促进几丁虫学科的持续发展,建立一个涵盖系统分类、鉴定特征、标本影像、定量数据、产地、层位、剖面及文献出处等多维度信息的几丁虫开源数据库正逢其时。相关从业人员均可对数据进行检索、录入、厘定、导出及分析研究,切实增进几丁虫数据的可用性和便捷性。在进行数据库建设的同时,运用一系列高新技术手段,逐步对早前建立的信息不完备的、或有争议的几丁虫进行再研究,完善其形态学特征,对争议属种进行厘定。该研究不仅有利于推动基于大数据的几丁虫古生物学研究,为数据驱动的基础研究新范式提供典型案例,还将有效促进以几丁虫为代表的微体化石的学科发展,最终提升我国在这一领域的国际学术影响力。

关键词：几丁虫数据库生物地层生物多样性生物学属性

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Second Hemispheric Conference on Medical Geology

引用

Episodes 2008年第3期31卷 361-362页

作者： Slinus, olle Finkelman, Robert B. Centeno, Jose A. Geol Survey Sweden Uppsala Sweden Univ Texas Dallas Dallas TX 75230 USA Armed Forces Inst Pathol Washington DC 20306 USA

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

The Medical Geology revolution --The evolution of an IUGS initiative

引用

Episodes 2007年第4期30卷 305-309页

作者： olle Selinus Robert B. Finkelman Jose A. Centeno Geological Survey of SwedenUppsala SE-751 28SWEDEN University of Texas at DallasDept. of GeosciencesRichardson TX 750833USA U. S. Armed Forces Institute of PathologyWashington DC 20306-6000USA

Introduction In December 2003 Episodes published an article entitled'Medical Geology:New Relevance in the Earth Sciences'by Bowman,Bobrowski,and *** paper was iust one early example of the interest and excitement sparked by this emerging field of medical geology-the impacts of geologic materials and geologic processes on animal and human *** geology attempts to bring together geoscientists and biomedical/public health researchers to address a range of environmental health problems.

关键词：医学地质学进化方法国际地质科学联合会创作精神

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

欢迎您,

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案：

请选择收藏分类：

通借通还

欢迎您,

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：