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The value of 11c-choline pet/cT imaging for differentiating malignant from benign prostate lesions

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The value of 11C-choline PET/CT imaging for differentiating ...

Effect of gap size and forest type on mineral nitrogen forms under different soil properties

首届全国分子核医学暨分子影像学学术交流会

作者： LI XIN, LIU QINGWEI pet/cT cENTEr OF SHANDONG PrOVINcIAL HOSPITAL

Objective 11c-choline is a new radiopharmaceutical which has a high uptake in prostate tumor and negligible secretion into the urinary system. The aim of this study was to investigate the potential of 11c-choline pet/cT imaging for differentiating prostate cancer from benign prostate hyperplasia. Methods A total of 45 patients with prostate lesions underwent 11c-choline pet/cT imaging. pet/cT imaging were

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Journal of Forestry research 2020年第2期31卷 375-386页

作者： Ales Kucera Ladislav Holik Elena Munoz cerro Jan petricek Department of Geology and Pedology Mendel University in BrnoZemedelska361300 BrnoCzech Republic crop research Institute Drnovska507/7316106 Praha 6–RuzyneCzech Republic Institute for research in Sustainable Forest Management University of ValladolidPalenciaCastille and LeonSpain

Gaps play a key role in forest ecosystem development and result from either natural processes or targeted forest management *** aim of this study was to investigate the interrelationships of soil properties in each of three forest types and two treatments,and to identify factors that influence levels of soil mineral nitrogen *** relation between mineral nitrogen and factors of soil parameters and stand type(European beech,Norway spruce,mixed stand)categories were *** spruce forest type stored significant nitrogen in both mineral forms of ***,there was a significant linear dependence between N-NO3^-(nitrate anion)concentrations and cation exchange capacity(cEc)parameters such as base cation contents(S-cEc)and potential ureolytic activities(UreasePot),as well as between N-NH4^+(ammonium cation)concentrations and both hydrolytic acidities(Ha-cEc)and ureolytic *** dependence of N-NO3^-concentrations on S-cEc contents and UreasePot was negative,especially in adjacent *** dependence of N-NH4^+concentrations on Ha-cEc and UreasePot was week in the beech and mixed forest types while it was significantly positive in the spruce forest type.

关键词： NH4+ NO3^- Urease Protease European beech Norway spruce

An improved exponential filter for fast nonlinear registration of brain magnetic resonance images

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Progress in Natural Science:Materials International 2009年第6期19卷 759-767页

作者： Zhiying Long a, Li Yao a,b, Kewei chen c, Danling Peng a a state Key Laboratory of cognitive Neuroscience and Learning, Beijing Normal University, Beijing 100875, china b School of Information Science and Technology, Beijing Normal University, Beijing 100875, china c Banner Alzheimer Institute (BAI) & Samaritan pet center, Phoenix, AZ, USA state Key Laboratory of cognitive Neuroscience and Learning Beijing Normal University Beijing 100875 China School of Information Science and Technology Beijing Normal University Beijing 100875 China Banner Alzheimer Institute (BAI) & Samaritan pet center Phoenix AZ USA

A linear elastic convolution filter was derived from the eigenfunctions of the Navier-stokes differential operator by Bro-Nielsen in order to match images with large deformations. Due to the complexity of constructing the elastic convolution filter, the algorithm’s efficiency reduces rapidly with the increase in the image’s size. In our previous work, a simple two-sided exponential filter with high efficiency was proposed to approximate an elastic filter. However, its poor smoothness may degenerate the performance. In this paper, a new exponential filter was constructed by utilizing a modified nonlinear curve fitting method to approximate the elastic filter. The new filter’s good smoothness makes its performance comparable to an elastic filter. Its simple and separable form makes the algorithm’s speed faster than the elastic filter. Furthermore, our experiments demonstrated that the new filter was suitable for both the elastic and fluid models.

关键词： Exponential filter Nonlinear registration Magnetic resonance imaging

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摇蚊幼虫对沉积物中重金属复合污染评估

生态学杂志 2014年第3期33卷 680-686页

作者：邓鑫 Vincent pet-FIGrOVE 杨小南李晓军刘宛 Kallie TOWSEND 台培东中国科学院沈阳应用生态研究所沈阳110016 中国科学院大学北京100049 research and Technology MelbounleWaterMelbourneVictoria 3001 不详

使用采自野外的6组沉积物作为受试沉积物,一龄摇蚊(chironomus tepperi)幼虫作为受试物种,对摇蚊幼虫分别进行了5 d生长及20 d慢性毒性试验,分别观测了摇蚊幼虫头宽、体长,雄、雌性摇蚊平均羽化时间、摇蚊发育速率、存活率、羽化率、摇... 详细信息

使用采自野外的6组沉积物作为受试沉积物,一龄摇蚊(chironomus tepperi)幼虫作为受试物种,对摇蚊幼虫分别进行了5 d生长及20 d慢性毒性试验,分别观测了摇蚊幼虫头宽、体长,雄、雌性摇蚊平均羽化时间、摇蚊发育速率、存活率、羽化率、摇蚊性别比例共8项指标与沉积物中污染的响应关系。结果表明,摇蚊体长、存活率及羽化率均受到As、cu、Zn、Pb、cd的污染而显著降低(Pcr、Ni、co与摇蚊生长发育的各指标间并不存在显著相关。在所观测因素中,摇蚊幼虫体长、摇蚊平均羽化用时、羽化率、存活率在测试沉积物质量方面是需要重点考虑的因素。

关键词：摇蚊幼虫沉积物金属污染生态响应

Analysing the Potential Impact of climate change on the Hydrological regime of the Upper Benue river Basin (North cameroon)

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Journal of Water resource and Protection 2024年第8期16卷 569-583页

作者： Elisabeth Dassou Fita Auguste Ombolo Thierry c. Fotso-Nguemo Daniel Bogno Saïdou Augustin Daïka steven chouto Felix Abbo Mbele Department of Meteorology and Hydrology The National Advanced School of Engineering of Maroua The University of Maroua Maroua Cameroon Higher Institute of Agriculture Wood Water and Environment The University of Ebolowa Ebolowa Cameroun Department of Hydraulics and Water Management The National Advanced School of Engineering of Maroua The University of Maroua Maroua Cameroon climate change research Laboratory (ccrL) National Institute of Cartography Yaoundé Cameroon Department of Geography Faculty of Arts Letters and Social Sciences University of Maroua Maroua Cameroon

In this study, we analyse the climate variability in the Upper Benue basin and assess its potential impact on the hydrology regime under two different greenhouse gas emission scenarios. The hydrological regime of the basin is more vulnerable to climate variability, especially precipitation and temperature. Observed hydroclimatic data (1950-2015) was analysed using a statistical approach. The potential impact of future climate change on the hydrological regime is quantified using the Gr2M model and two climate models: HadGEM2-ES and MIrOc5 from cMIP5 under rcP 4.5 and rcP 8.5 greenhouse gas emission scenarios. The main result shows that precipitation varies significantly according to the geographical location and time in the Upper Benue basin. The trend analysis of climatic parameters shows a decrease in annual average precipitation across the study area at a rate of -0.568 mm/year which represents about 37 mm/year over the time 1950-2015 compared to the 1961-1990 reference period. An increase of 0.7°c in mean temperature and 14% of pet are also observed according to the same reference period. The two climate models predict a warming of the basin of about 2°c for both rcP 4.5 and 8.5 scenarios and an increase in precipitation between 1% and 10% between 2015 and 2100. Similarly, the average annual flow is projected to increase by about +2% to +10% in the future for both rcP 4.5 and 8.5 scenarios between 2015 and 2100. Therefore, it is primordial to develop adaptation and mitigation measures to manage efficiently the availability of water resources.

关键词： climate Variability Hydrological Modelling climate Models Upper Benue Basin Northern cameroon

^(11)c-蛋氨酸pet显像诊断胶质瘤的价值

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中华核医学杂志 2003年第2期23卷 75-76页

作者：邵虹 Trampal c 吴靖川上海第二医科大学附属新华医院儿童医学中心影像诊断中心 200127 瑞典乌普萨拉大学pet中心上海第二医科大学附属新华医院儿童医学中心核医学科 200127

目的　评价1 1 c 蛋氨酸 (MET)pet显像诊断胶质瘤及鉴别良恶性胶质瘤的价值。方法2 2例经病理检查证实的不同分级胶质瘤患者行1 1 c METpet显像 ,对病灶进行定量分析。结果　 2 2例患者的瘤组织均有明显1 1 c MET摄取且与周围正常组织... 详细信息

目的　评价1 1 c 蛋氨酸 (MET)pet显像诊断胶质瘤及鉴别良恶性胶质瘤的价值。方法2 2例经病理检查证实的不同分级胶质瘤患者行1 1 c METpet显像 ,对病灶进行定量分析。结果　 2 2例患者的瘤组织均有明显1 1 c MET摄取且与周围正常组织分界清晰 ,Ⅰ～Ⅱ级胶质瘤热点计数与对侧相同部位 (HS cA)放射性比值为 1 .57± 0 .2 8,明显低于Ⅲ～Ⅳ级胶质瘤 (3 .0 6± 0 .47,t=6 .48,P cA比值差异无显著性 (t=1 .85 ,P >0 .0 5)。结论　1 1 c METpet显像有助于鉴别诊断不同分级的胶质瘤。

关键词： ^11c-蛋氨酸 pet显像诊断胶质瘤碳放射性同位素

Does climate change alter the nutrient trends of cedrela fissilis *** in the southern Brazilian Amazon?

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Ecological Processes 2023年第1期12卷 806-827页

作者： Daigard r.Ortega rodriguez raúl Sánchez-Salguero Andrea Hevia renata c.Bovi Marciel J.Ferreira James H.Speer Fidel A.roig Mario Tomazello-Filho Escola Superior de Agricultura Luiz de Queiroz Departamento de Ciências FlorestaisUniversidade de São PauloAv.Pádua Dias 11PiracicabaSão Paulo 13418-900Brazil DendrOlavide-Department Sistemas Físicos Químicos y NaturalesUniversidad Pablo de OlavideCrta.Utrera Km.141013 SevilleSpain Department of Ecology Universidad de JaénCampus Las Lagunillas s/n.23009 JaénSpain Departamento de ciência Florestal Solos e AmbienteUniversidade Estadual PaulistaAv.Universitária 3780BotucatuSão Paulo 18610-034Brazil Laboratory of Silviculture Universidade Federal do Ama-zonasAv.Gen.Rodrigo Octávio 6200ManausAmazonas 69080-900Brazil Department of Earth and Environmental Systems Indiana State UniversityTerre MauteIN 47809USA Argentine Institute of Nivology Glaciology and Environmental Sciences(IANIGLA CONICETUniversidad Nacional de Cuyo)5500 MendozaArgentina Hémera centro de Observación de la Tierra Escuela de Ingeniería ForestalFacultad de CienciasUniversidad MayorSantiagoChile

Background The increase in the frequency and intensity of droughts is pointed out as one of the main factors altering biogeochemical cycles in the Amazon *** eco-nutritional approach using X-ray fluorescence micro-analysis(μXrF)is proposed to verify the long-and short-term effects of droughts on the growth and xylem nutrient concentrations of cedrela fissilis *** Fourteen radii were selected from a tree-ring width chronology and X-rayed by Itrax *** of ring width,wood density,and concentrations of aluminum(Al),phosphorus(P),sulfur(S),calcium(ca),potassium(K),manganese(Mn),iron(Fe)and strontium(Sr)together with Al/ca,ca/Mn,K/ca,Sr/ca and Mn/S ratios were constructed and correlated with precipitation,temperature,the difference between precipitation and potential evapotranspiration(P-pet)and standardized precipitation-evapotranspiration index(SPEI).results During dry years,*** showed narrower,less dense rings,lower Al,P,S and ca,and higher K and Fe concentrations(the opposite was found in wet years).ring width decreased(together with Al,P,S,K,ca,Mn,Fe,Sr,Al/ca,K/ca and Sr/ca)and wood density increased(together with ca/Mn and Mn/S),which was associated with an increase in evapotranspiration and temperature over time,mainly since *** fissilis showed a tendency to increase its capacity for resistance,and a recovery and resilience in growth over time associated with responses in Al,ca,P and ***,it showed a risk in the capacity for recovery of the pre-drought density values,associated with unsatisfactory responses in Al,ca,K,Fe and *** This study is the first attempt to analyze tree-ring nutritional evidences of *** trees to climate sensitivity and resilience to drought,based on long-term data from seasonal moist tropical forests of the *** data suggested that *** is undergoing alterations in the concentration,use and redistribution of nutrients associated with increasing wood density and d

关键词： Dendrochemistry μXrF Drought Tropical tree Eco-chemical indicator resilience resistance recovery

role of(～(18)F)2-fluoro-2-deoxyglucose positron emission tomography in upper gastrointestinal malignancies

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World Journal of Gastroenterology 2011年第46期17卷 5059-5074页

作者： Elizabeth c Smyth Manish A Shah Department of Gastrointestinal Oncology Weill Cornell Medical CollegeMemorial Sloan-Kettering Cancer Center Department of Gastrointestinal Oncology Weill Cornell Medical CollegeNew York-Presbyterian Hospital

The role of whole-body FDG [(～(18)F)2-fluoro-2-deoxy-glucose] positron emission tomography(pet)scan-ning as an imaging modality in the management of patients with malignancy has evolved enormously over the past two ***-pet has demonstrated signifi cant effi cacy in the staging,prognostication and detection of occult metastatic disease in malignancies of the gastrointestinal tract,in addition to assessment of the response to cytotoxic chemotherapy in a more timely manner than has traditionally been possible by more conventional imaging *** sensitivity and specif icity of FDG-pet for the detection and staging of malignancy depend not only on the site and size of the primary tumor and metastases,but also on histologi-cal cell type,reflecting underlying disparities in glucose *** metabolic response to neo-adjuvant chemotherapy or to chemo-radiotherapy in cancers of the gastro-esophageal junction or stomach has been demonstrated in several prospective studies to correlate signifi cantly with both the histological tumor response to treatment and with consequent improvements in overall *** may offer a future paradigm ofpersonalized treatment based on the pet.response to ***-pet has been less successful in efforts to screen for and detect recurrent upper gastro-intestinal malignancies,and in the detection of low vol-ume metastatic peritoneal *** to improve the accuracy of pet include the use of novel radiotrac-ers such as(～(18)F)FLT(3-deoxy-3-fluorothymidine)or 11c-choline,or fusion pet-cT with concurrent high-res-olution computed *** review focuses on the role of FDG-pet scanning in staging and response assessment in malignancies of the upper gastrointesti-nal tract,specif ically gastric,esophageal and pancreas carcinoma.

关键词： Positron emission tomography Gastric cancer Esophageal cancer Pancreas cancer

多模态pet/MrI影像组学鉴定帕金森病和多系统萎缩

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国际医学放射学杂志 2024年第2期 251-251页

作者： J.J.Sun c.cong X.P.Li W.c.Zhou r.X.Xia H.Liu 侯唯姝

摘要目的基于多模态pet/MrI影像组学和临床特征建立鉴别帕金森病（PD）与多系统萎缩（MSA）的机器学习模型。方法纳入119例病人（PD 81例，MSA 38例）行脑pet/

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