检索结果-南通市图书馆

扩散加权MRI诊断神经内分泌肿瘤肝转移瘤的高敏感性:与T2WI和动态钆剂增强MRI比较

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

国际医学放射学杂志 2013年第5期 479-480页

作者： g.d’assignies P.Fina O.Bruno M.P.Vullierme F.Tubach V.Paradis 罗宴吉 departments of Radiology Assistance-Publique Hpitaux de ParisHpital Beaujon

摘要目的比较扩散加权MRI、T2WI快速自旋回波、3d动态钆剂增强MRI诊断神经内分泌肿瘤肝转移瘤的敏感性和特异性,以手术和免疫病理学检查结果为参照标准。材料与方法该回顾性研究经伦理委员会批准,免除病人知情同意。神经内分泌肿瘤59例... 详细信息

摘要目的比较扩散加权MRI、T2WI快速自旋回波、3d动态钆剂增强MRI诊断神经内分泌肿瘤肝转移瘤的敏感性和特异性,以手术和免疫病理学检查结果为参照标准。材料与方法该回顾性研究经伦理委员会批准,免除病人知情同意。神经内分泌肿瘤59例(其中41例有肝转移瘤162个,18例无肝转移瘤作为对照),MRI检查序列包括dWI、T2WI快速自旋回波序列和动态钆剂增强序列。由2名腹部放射医师独立地回顾性分析评估影像,发现并描述肝转移瘤的特征。比较每个肝内病灶MRI表现、组织病理学表现及术中超声表现以确定MRI各序列或序列组合诊断的敏感性。与对照

关键词：肝转移瘤敏感性 T2WI 神经内分泌 MRI 扩散加权

Radioisotope production using lasers:From basic science to applications

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Matter and Radiation at Extremes 2024年第3期9卷 31-44页

作者： M.R.d.Rodrigues A.Bonasera M.Scisciò J.A.Pérez-Hernández M.Ehret F.Filippi P.L.Andreoli M.Huault H.Larreur d.Singappuli d.Molloy d.Raffestin M.Alonzo g.g.Rapisarda d.Lattuada g.L.guardo C.Verona Fe.Consoli g.Petringa A.McNamee M.La Cognata S.Palmerini T.Carriere M.Cipriani g.di giorgio g.Cristofari R.de Angelis g.A.P.Cirrone d.Margarone L.giuffrida d.Batani P.Nicolai K.Batani R.Lera L.Volpe d.giulietti S.Agarwal M.Krupka S.Singh Fa.Consoli Cyclotron Institute Texas A&M UniversityCollege StationTexas 77840USA Laboratori Nazionali del Sud Istituto Nazionale di Fisica Nucleare(LNS-INFN)CataniaItaly ENEA Fusion and Technologies for Nuclear Safety and Security Department-CFrascatiItaly Centro de Láseres Pulsados(clpu) VillamayorSpain Universidad de Salamanca SalamancaSpain Centre Lasers Intenses et Applications(CELIA) Universitéde BordeauxCNRSCEATalenceFrance HB11 Energy Holdings Pty FreshwaterNew South WalesAustralia School of Mathematics and Physics Queen’s University BelfastBelfastUnited Kingdom dipartimento di Fisica e Astronomia“E.Majorana ”Università di CataniaCataniaItaly Facoltàdi Ingegneria e Architettura Universitàdegli Studi di Enna“Kore”EnnaItaly dipartimento di Ingegneria Industriale Universitàdi Roma“Tor Vergata”RomaItaly dipartimento di Fisica e geologia Universitàdegli Studi di PerugiaPerugiaItaly Istituto Nazionale di Fisica Nucleare Sezione di PerugiaPerugiaItaly ELI Beamlines Facility the Extreme Light Infrastructure ERICDolni BrezanyCzech Republic ETSIA Universidad Politécnica de MadridMadridSpain dipartimento Fisica “E.Fermi”Universitàdi Pisa and INFNPisaItaly FZU–Institute of Physics of Czech Academy of Sciences PragueCzech Republic Institute of Plasma Physics of Czech Academy of Sciences PragueCzech Republic

The discovery of chirped pulse amplification has led to great improvements in laser technology,enabling energetic laser beams to be compressed to pulse durations of tens of femtoseconds and focused to a few *** with energies of tens of MeV can be accelerated using,for instance,target normal sheath acceleration and focused on secondary *** such conditions,nuclear reactions can occur,with the production of radioisotopes suitable for medical *** use of high-repetition lasers to produce such isotopes is competitive with conventional methods mostly based on *** this paper,we study the production of^(67)Cu,^(63)Zn,^(18)F,and^(11)C,which are currently used in positron emission tomography and other *** the same time,we study the reactions^(10)B(p,α)^(7)Be and^(70)Zn(p,4n)^(67)ga to put further constraints on the proton distributions at different angles,as well as the reaction^(11)B(p,α)^(8)Be relevant for energy *** experiment was performed at the 1 PW laser facility at VegaⅢin Salamanca,*** distributions of radioisotopes in the forward(with respect to the laser direction)and backward directions were measured using a high purity germanium *** results are in reasonable agreement with numerical estimates obtained following the approach of Kimura and Bonasera[*** ***.,Sect.A 637,164–170(2011)].

关键词： purity estimates backward

The magnetosheath at high spectral resolution

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

Earth and Planetary Physics 2024年第1期8卷 234-246页

作者： K.d.Küntz d.Koutroumpa W.R.dunn A.Foster F.S.Porter d.g.Sibeck B.Walsh The Henry A.Rowland department of Physics and Astronomy Johns Hopkins University3701 San Martin DriveBaltimoreMD21218USA NASA g.ddard Space Flight Center 8800 Greenbelt RoadGreenbeltMD 20771USA LATMOS-OVSQ CNRSUVSQ Paris-SaclaySorbonne Université11 Boulevard d’Alembert78280GuyancourtFrance department of Physics and Astronomy University College LondonLondonUK The Centre for Planetary Science at UCL/Birkbeck Gower StreetLondon WC1E 6BTUK Center for Astrophysics Harvard University&Smithsonian Institution60 Garden StreetCambridgeMA 02138USA Center for Space Physics Boston University110 Cummington MallBostonMAUSA

While we eagerly anticipate SMILE’s(Solar wind Magnetosphere Ionosphere Link Explorer)unprecedented X-ray observations of the Earth’s magnetosheath and the initiation of a new era of magnetospheric research,it seems appropriate to look ahead to the abilities of the next generation of astrophysics *** these,the Line Emission Mapper(LEM),a large aperture micro-calorimeter based mission,is currently planned to be able to observe the magnetosheath at high spectral resolution(~2 eV).With a field of view of~30′,LEM will allow higher spatial resolution and higher cadence measurement of the motion of a very small portion of the magnetopause over relatively short periods of time(multiple hours),complementing SMILE’s global ***’s strength is its spectral *** will be able to measure the abundance of a broad range of elements and ionization states,many of which are inaccessible to current in situ instruments,and will be able to separate the emission from the magnetosheath from the emission from the cosmic X-ray background using the difference in their relative velocities.

关键词： magnetosheath charge exchange solar wind abundances

维普期刊数据库

磁共振与生物分析法无创定量分析人肝脂肪变性

在线全文

学校读者我要写书评

暂无评论

国际医学放射学杂志 2009年第5期32卷 519-519页

作者： g.d’assignies M.Ruel A.Khiat L.Lepanto M.Chagnon C.Kauffmann 郭雪梅 département de radiologie Centre hospitalier de l’Université de Montréal(CHUM)MontréalQuébecCanada

本研究的目的是以组织病理作为参考标准，评价3种MR成像技术检出脂肪肝的效能．并判断单独使用哪一种无创技术（MRI或生物分析）或两种技术联用是定量肝脏脂肪的最佳选择。20例组织病理证实的脂肪肝病人和24例对照受试者接受了肝脏单体... 详细信息

本研究的目的是以组织病理作为参考标准，评价3种MR成像技术检出脂肪肝的效能．并判断单独使用哪一种无创技术（MRI或生物分析）或两种技术联用是定量肝脏脂肪的最佳选择。20例组织病理证实的脂肪肝病人和24例对照受试者接受了肝脏单体素质子MR波谱分析（MRS；3个体素）、双回波正反相位MR成像（dEI）和扩散加权MR成像（dWI）检查。并对脂肪肝病人的血液或尿液进行生物分析。

关键词：脂肪肝 MRI MR波谱组织病理学脂肪定量

维普期刊数据库

同时评价肝脏容积与全肝脂肪含量的一站式术前MRI诊断参数的初步研究

在线全文

学校读者我要写书评

暂无评论

国际医学放射学杂志 2011年第2期 199-199页

作者： g.d'assignies C.Kauffmann Y.Boulanger M.Bilodeau V.Vilgrain g.Soulez 唐光健 department of Medical Imaging University of Montreal and Centre de rechercheCentre hospitalier de l'Université de Montréal(CRCHUM)Hpital Saint-Luc

目的本研究的目的是评价全肝容积(WLV)分段计算测量脂肪分数(FF)。方法连续20例组织学证实脂肪性肝病病人接受了1.5T双回波同相位/反相位MRI与MR波

关键词：肝脏脂肪脂肪性肝病 MRI 肝脏分段肝脏容积

Changes in calcium accumulation and utilization efficiency and their impact on recycling, immobilization, and export across the oil palm cycle

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Oil Crop Science 2024年第3期9卷 143-150页

作者： Viégas I.d.J.M. Souza L.C.d. Ferreira E.V.d.O. Costa M.g. Nogueira g.A.d.S. Nascimento V.R.d. Oliveira Neto C.F.d. Capanema Campus Federal Rural University of the Amazon (UFRA) Av. Barão de Capanema Caixa D'agua 5514-6434 Pará Brazil Center of Agricultural and Environmental Sciences Federal University of Maranhão (UFMA) Chapadinha BR-222 km 04 SN Boa Vista 65500000 Maranhão Brazil Capitão Poço Campus Federal Rural University of the Amazon (UFRA) Tv. Pau Amarelo S/n - Vila Nova Capitão Poço 68650-000 Pará Brazil department of Soil Science São Paulo State University (Unesp) School of Agricultural and Veterinarian Sciences Jaboticabal Via de Acesso Prof. Paulo Donato Castelane Castellane - S/N - Vila Industrial São Paulo 14884-900 Brazil Institute of Agricultural Sciences (ICA) Federal Rural University of the Amazon (UFRA) Estr. Principal da Ufra 2150 Curió-Utinga Belém 66077-580 Pará Brazil

Effective calcium (Ca) management is crucial for optimizing oil palm cultivation and enhancing crop yield. This study aimed to gain insights into the dynamics of Ca concentration, accumulation, exportation, immobilization, and recycling in various oil palm organs relative to plant age. The experiment was conducted at the Agropalma enterprise site in the northeastern region of Pará State, Brazil, evaluating seven plant age treatments: 2, 3, 4, 5, 6, 7, and 8 years old. Employing a completely randomized design with four replications. The results demonstrated an age-related increase in Ca concentration in petioles, rachis, arrows, male inflorescences, peduncles, and fruits. Furthermore, Ca accumulation exhibited an upward trend in all organs with progressing plant age. Notably, the study revealed an enhanced Ca use efficiency across all plant organs in correlation with the age of oil palm cultivation. These findings underscore the dynamic nutritional demands of oil palm, influencing Ca immobilization, cycling, and export throughout its developmental stages. © 2024 the Oil Crop Research Institute, Chinese Academy of Agriculture Sciences

关键词： Amazon Ca cycling Ca export Ca immobilization Ca use efficiency Elaeis guineensis Jacq. Plant nutrition

Malargüe Site Remediation: A Successful Solution for Uranium Mill Tailings

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

原子能科学技术 2024年

作者： BARARI E díAZ J g gIOMIA KEMPF R A National Atomic Energy Commission Av.Del Libertador 8250 Ciudad Autónoma de Buenos AiresC1429BNP Argentina

Comisión Nacional de Energía Atómica(CNEA) has the responsibility for restoring uranium mining facilities once the operations have finished. CNEA, within its Environmental Program and in compliance with its legal responsibilities, decides to implement a restoration project for all sites related to the mining and processing of uranium ores. The Malargüe Site is located within the Province of Mendoza in the city of Malargüe. It is the first site to successfully complete its remediation. The activities consist of relocation of tailings to an engineering repository. The tailings management(encapsulation) and rehabilitation of the area was finished in June 2017. The remediation alternative for the ore tailings was selected after conducting comparative studies and submitted the project to the society for consideration. The objective of the encapsulation of the mineral tails is to isolate them from the environment, also proceeding with the decontamination and rehabilitation of the area(landscaping,post-closure monitoring and 20 years monitoring period). Encapsulation consisted of the construction of a containment cell for the mine tailings, to isolate them and prevent pollutants from entering the environment through the transfer routes. To clean the impacted areas, the soil was removed, it was incorporated into the encapsulation, and the filling was carried out with natural soils from the *** prevents radon transfer to the environment, as 222Ra is an alpha emitter with a half-life of four days, which produces its own radioactive progeny. Radon progeny are solids, and when a 222Ra nucleus emits an alpha particle into the air, the resulting 218Po nucleus, momentarily electrically charg.d, adheres to any dust particle. Remediation prevents the discharge into the air containing radon and also containing.dust particles charg.d with intensely radioactive radon progeny. The tasks mentioned make it possible to decrease radon emanation, reduce radiological risks to the

关键词：

胰腺内分泌肿瘤:灌注CT评价的肿瘤血流反映了血管发生并与预后因素相关

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

国际医学放射学杂志 2009年第2期32卷 186-186页

作者： g.d’assignies A.Couvelard S.Bahrami M.P.Vullierme P.Hammel O.Hentic 朱玉兆 departments of Radiology and Pathology INSERM Unité 773 CRB3and the Fédération Médico ChirurgicaleBeaujon Hospital

目的前瞻性评价胰腺内分泌肿瘤的多层CT灌注测定与组织学上肿瘤微血管密度的相关性，并确定不同分级的肿瘤其CT灌注参数是否有区别。方法本研究获机构审查委员会批准和知情同意书。

关键词：胰腺内分泌肿瘤 CT灌注预后因素血管发生 CT评价肿瘤微血管密度血流前瞻性评价

维普期刊数据库

多房性腺泡细胞囊腺瘤与胰腺导管内乳头状黏液性肿瘤的CT和MR成像的对比研究

在线全文

学校读者我要写书评

暂无评论

国际医学放射学杂志 2014年第6期 595-595页

作者： C.delavaud g.d’ assignies J.Cros P.Ruszniewski P.Hammel P.Levy 李晓凤 Service de Radiologie Hpital Beaujon100Boulevard du Général Leclerc92118 Clichy CedexFrance

摘要目的描述胰腺腺泡细胞囊腺瘤(ACC)的CT和MRI的影像特征,并比较其与胰腺导管内乳头状黏液性肿瘤(Bd-IPMN)的不同。方法回顾性纳入5例ACC病人和20例

关键词：胰腺导管内乳头状黏液性肿瘤 MR IPMN 囊腺瘤 CT