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可疑卵巢癌病人的全身MR扩散加权序列分期:CT和FDG-PET/CT的临床可行性对照研究

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国际医学放射学杂志 2014年第3期 304-304页

作者： k.Michielsen I.Vergote k.op de beeck F.Amant k.Leunen P.Moerman 许玉峰 department of Radiology Medical Imaging Research CentreUniversity Hospitals LeuvenHerestraat 493000 LeuvenBelgium

摘要目的与CT和18F-氟脱氧葡萄糖正电子发射体层成像/CT(FDG-PET/CT)对照,评价全身MR扩散加权成像(WB-DWI/MRI)用于可疑卵巢癌病人的分期和评估手术可

关键词：卵巢癌 DWI 卵巢恶性肿瘤卵巢肿瘤 PET FDG-PET/CT CT 病人 MR 全身

MR扩散加权成像对常规动态增强MRI检测肝细胞癌提供的附加价值

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国际医学放射学杂志 2009年第6期 605-605页

作者： V.Vandecaveye F.de keyzer C.Verslype k.op de beeck M.komuta B.Topal 蔡兆熙 department of Radiology University Hospitals LeuvenB-3000 LeuvenBelgium

本研究的目的是为了评估扩散加权MRI(DW-MRI)对鉴别肝细胞肝癌和良性肝硬化结节的准确性并与常规动态对比增强MRI进行比较。55个肝硬化病人进行1.5T的常规MRI和DW MRI检查。分别测量b0、b100、b600、b1000图上实性肝脏病变与周围肝实

关键词： MRI DW 肝硬化肝细胞肝癌常规

Combined hepatocellular and cholangiocellular carcinoma presenting with radiological characteristics of focal nodular hyperplasia

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World Journal of Gastroenterology 2009年第31期15卷 3940-3943页

作者： Inneke Willekens Anne Hoorens Caroline Geers Bart op de beeck Frederik Vandenbroucke Johan de Mey department of Radiology and Pathology

Combined hepatocellular and cholangiocellular carcinoma (cHCC-CC) is a rare tumor type containing unequivocal elements of both hepatocellular carcinoma and cholangiocarcinoma that are intimately mixed. Although these tumors are usually considered to be more related to hepatocellular carcinoma than to cholangiocarcinoma, they sometimes, in contrast to hepatocellular carcinoma, contain a significant amount of fibrous stroma. This might in some cases explain atypical radiological features. We report a case of a cHCC-CC in a 47-year-old female that resembled focal nodular hyperplasia on Magnetic Resonance Imaging. Correlation of imaging and serum levels of α-fetoprotein and CA19.9 can help to make the correct diagnosis preoperatively.

关键词： Combined hepatocellular Cholangiocellular carcinoma Magnetic resonance imaging

Acute necrotizing pancreatitis as fi rst manifestation of primary hyperparathyroidism

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World Journal of Gastroenterology 2010年第23期16卷 2959-2962页

作者： Jeroen I Lenz Jimmy M Jacobs Bart op de beeck Ivan A Huyghe Paul A Pelckmans Tom G Moreels Division of Gastroenterology and Hepatology Antwerp University Hospital Division of Radiology Antwerp University Hospital Division of Nuclear Medicine Antwerp University Hospital

We report the case of a female patient with severe acute necrotizing pancreatitis associated with hypercalcemia as first manifestation of primary hyperparathyroidism caused by a benign parathyroid *** the acute pancreatitis was treated *** patient subsequently underwent surgical resection of the parathyroid adenoma and surgical clearance of a large infected pancreatic *** the association of parathyroid adenoma-induced hypercalcemia and acute pancreatitis is a known medical entity,it is very *** pathophysiology of hypercalcemia-induced acute pancreatitis is therefore not well known,although some mechanisms have been *** is important to treat the provoking ***,the cause of hypercalcemia should be identif ied *** resection of the parathyroid adenoma is the ultimate therapy.

关键词： Acute necrotizing pancreatitis Hypercalcemia Primary hyperparathyroidism Parathyroid adenoma

A Variational Multiscale Method for Particle Dispersion Modeling in the Atmosphere

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Fluid Dynamics & Materials Processing 2023年第3期19卷 743-753页

作者： Y.Nishio B.Janssens k.Limam J.van beeck Royal Military Academy(RMA) Brussels1000Belgium Universite de La Rochelle(ULR) La Rochelle17000France Von karman Institute for Fluid Dynamics(VkI) Sint-Genesius-Rode1640Belgium

A LES model is proposed to predict the dispersion of particles in the atmosphere in the context of Chemical,Biological,Radiological and Nuclear(CBRN)*** code relies on the Finite Element Method(FEM)for both the fluid and the dispersed solid *** from the Navier-Stokes equations and a general description of the FEM strategy,the Streamline Upwind Petrov-Galerkin(SUPG)method is formulated putting some emphasis on the related assembly matrix and stabilization ***,the Variational Multiscale Method(VMS)is presented together with a detailed illustration of its algorithm and hierarchy of computational *** is demonstrated that the VMS can be considered as a more general version of the SUPG *** final part of the work is used to assess the reliability of the implemented predictor/multicorrector solution strategy.

关键词： ABL(Atmospheric boundary layer) CFD FEM LES SUPG(Streamline upwind petrov–Galerkin) Turbulent flow VMS(Variational MultiScale method)

Solving Pdes with a Hybrid Radial Basis Function:Power-Generalized Multiquadric kernel

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Advances in Applied Mathematics and Mechanics 2022年第5期14卷 1161-1180页

作者： Cem Berk Senel Jeroen van beeck Atakan Altinkaynak von karman Institute for Fluid Dynamics Belgium Istanbul Technical University Mechanical Engineering DepartmentIstanbulTurkey

Radial Basis Function(RBF)kernels are key functional forms for advanced solutions of higher-order partial differential equations(Pdes).In the present study,a hybrid kernel was developed for meshless solutions of Pdes widely seen in several engineering *** kernel,Power-Generalized Multiquadric-Power-GMQ,was built up by vanishing the dependence of e,which is significant since its selection induces severe problems regarding numerical instabilities and convergence *** drawback of e-dependency is that the optimal e value does not exist in *** present the Power-GMQ kernel which combines the advantages of Radial Power and Generalized Multiquadric RBFs in a generic ***-GMQ RBF was tested in higher-order Pdes with particular boundary conditions and different ***-Finite Difference(RBF-FD)discretization was also implemented to investigate the characteristics of the proposed *** results revealed that our proposed kernel makes similar or better estimations as against to the Gaussian and Multiquadric kernels with a mild increase in computational ***-QR method may achieve better accuracy in some cases with considerably higher computational *** using Power-GMQ RBF,the dependency of solution on e was also substantially relaxed and consistent error behavior were obtained regardless of the selected e accompanied.

关键词： Meshfree collocation methods Radial Basis Function(RBF) partial differential equations(Pdes)

A guide for selecting the appropriate plot design to measure ungulate browsing

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Forest Ecosystems 2023年第6期10卷 732-742页

作者： Suzanne T.S.van beeck Calkoen Jerome Milch Andrea D.kupferschmid Christian Fiderer Marco Heurich department of Visitor Management and National Park Monitoring Bavarian Forest National ParkFreyunger Straße 294481 GrafenauGermany Wildlife Ecology and Management Albert-Ludwigs-University of FreiburgTennenbacher Str.479106 FreiburgGermany Swiss Federal Research Institute WSL Zürcherstrasse 1118903 BirmensdorfSwitzerland Faculty of Applied Ecology Agricultural Sciences and BiotechnologyInstitute for Forest and Wildlife ManagementCampus EvenstadKoppangNorway

Ungulate browsing often impairs tree regeneration,thus preventing the achievement of economic or conservation *** ungulate management would thus benefit from a practical decision tool that facilitates method selection from a wide range of monitoring methods and indicators currently *** this study,we first provide an overview of the different browsing-impact monitoring methods and indicators currently *** then present a newly developed decision matrix for method evaluation that can assist forest stakeholders in choosing the browsing-impact monitoring method best suited to their needs,based on the selected *** first step involved two separate literature reviews to create an overview of the currently applied methods and to select the indicators best suited for measuring browsing *** types of indicator groups with their respective parameters were considered important for method evaluation:browsing indicators(*** density,browsing incidents),performance indicators(***,expertise)and data quality indicators(*** to measurement errors).Subsequently,all parameters defined within each indicator group were categorised and a grade was assigned to each *** create the final method-indicator matrix,each browsing-impact monitoring method received a grade for each parameter within all indicator groups,reflecting the specific advantages and disadvantages of implementing the respective parameter within a specific *** utility of the matrix in selecting the most suitable monitoring method was then demonstrated using the example of Germany's national *** on the weights added to the method-indicator matrix,as defined by national park representatives,and considering local requirements the nearest-tree method was favoured over the other two *** newly developed matrix provides a more scientific objectification of ungulate browsing-impact measures and can be easily used by forest man

关键词： Ungulate Browsing impact Monitoring Indicator decision matrix Forest management

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头颈部鳞癌放化疗MRI扩散加权预测值

国际医学放射学杂志 2010年第5期 498-499页

作者： V.Vandecaveye P.Dirix F.de keyzer k.O.de beeck V.V.Poorten I.Roeben 曾双林 department of Radiology University Hospitals Leuven

关键词： DWI MRI 体积评估头颈部癌放化疗治疗预测

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高压强电离规特性线性化的新方法

中国检验检测 1975年第6期 24-26页

作者： U.beeck 余民森

压强大于10乇的电离真空计的工作原理已由Schulz 和 Phelps 概述了。本文描述适用于这一压强范围的两种类型的规管。两者都是三极管,其中一个的特点是具有极小的几何尺寸,另一个是市售的那种三极管,它也能用于低压强测量。那种减小几何... 详细信息

压强大于10乇的电离真空计的工作原理已由Schulz 和 Phelps 概述了。本文描述适用于这一压强范围的两种类型的规管。两者都是三极管,其中一个的特点是具有极小的几何尺寸,另一个是市售的那种三极管,它也能用于低压强测量。那种减小几何尺寸的三极管实质上对于测量上限是线性的,而"一般"几何尺寸的三极管在高压强时灵敏度增加(非线性的特性)。此后,大多数的制造厂

关键词：电离规离子收集极阳极电流线性化数学分析