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MR肠管成像评估同种异体干细胞移植术后肠道移植物抗宿主疾病的价值

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国际医学放射学杂志 2015年第4期 388-388页

作者： t.derlin A.Laqmani S.Veldhoen I.Apostolova F.Ayuk G.Adam 李鹏 Department of Diagnostic and Interventional Radiology University Medical Center Hamburg-Eppendorf

摘要目的确定MR肠成像(MRE)用于造血干细胞移植术后(SCt)胃肠道移植物抗宿主疾病(GI Gv HD)检测和分级的价值。方法 41例已经确诊或疑有Gv HD的病人行MRE

关键词：移植物抗宿主疾病同种异体干细胞移植 MR

胸片显示的严重主动脉弓钙化强烈提示冠状动脉钙化

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国际医学放射学杂志 2013年第6期 603-603页

作者： P.Bannas C.Jung P.Blanke A.treszl t.derlin G.Adam 郭琪 Department of Otolaryngology Far Eastern Memorial Hospital

摘要目的评估胸片显示的主动脉弓钙化(AAC)与Ct判断的冠状动脉钙化(CAC)积分之间的相关性。方法回顾性研究行胸片和Ct CAC积分检测的128例[男性75例

关键词：主动脉弓钙化冠状动脉钙化 Ct 胸部X线摄影钙化积分

全身MRI对于干细胞移植术后多发性骨髓瘤病人持续性或复发性疾病的诊断效能

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国际医学放射学杂志 2012年第6期 602-602页

作者： P.Bannas H.B.Hentschel t.A.Bley A.treszl C.Eulenburg t.derlin 李京津 Department of Diagnostic and Interventional Radiology University Medical Center Hamburg-EppendorfMartinistr.5220246 HamburgGermany

目的比较全身MR成像(WBMRI)和血液学指标对干细胞移植术后多发骨髓瘤病人的持续性或复发性疾病的诊断效能。方法将33例经干细胞移植术治疗后的多发骨髓瘤病人在2个时间点进行66次WBMRI采集,将病人2个时间点间疾病的严重度和髓内外骨髓... 详细信息

目的比较全身MR成像(WBMRI)和血液学指标对干细胞移植术后多发骨髓瘤病人的持续性或复发性疾病的诊断效能。方法将33例经干细胞移植术治疗后的多发骨髓瘤病人在2个时间点进行66次WBMRI采集,将病人2个时间点间疾病的严重度和髓内外骨髓瘤病变的影像动态变化以统一的疗效标准进行比较(kappa统计),包括血液学指标。结果33例病人采集的66次WBMRI结果,10例病人(30.3%)被归为疾病进展,23例被认为疾病缓解。10例疾病进展病例中的8例(80%)出现髓外病灶。WBMRI和实验室检查结果在33例样本中有26例(78.8%)结果相一致。结果发现在WBMRI和血液学指标比较中存在51.2%的一致性,95%CI为19.8%～82.6%。WBMRI的敏感度为63.6%,特异度为86.4%,阳性预测值(PPV)70.0%,阴性预测值(NPV)82.6%以及对疾病缓解检测的精确度为78.8%。结论 WBMRI可以检测经干细胞移植术后多发骨髓瘤病人的髓内外病灶并进行精确定位,但是对于确定疾病缓解与常规实验室检查结果仅表现出中度的一致性。要点①WBMRI在肿瘤学应用中越来越发挥其优势。②WBMRI继SCt之后能对髓内、髓外骨髓瘤病变进行定位。③WBMRI和血清学分析在评价疗效时没有充分的一致性。④对于确定疾病缓解,WBMRI可在实验室检查以外提供有限额外的诊断价值。

关键词：多发性骨髓瘤全身MRI MRI 干细胞移植治疗监测

低剂量盆腔Ct的混合迭代算法运用于疑似左半结肠憩室炎

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国际医学放射学杂志 2016年第2期 207-207页

作者： A.Laqmani S.Veldhoen S.Dulz t.derlin C.Behzadi J.Schmidt-Holtz 倪世家 Department of Diagnostic and Interventional Radiology University Medical Center Hamburg-Eppendorf

摘要目的评价混合迭代重建算法(HIR)和滤过反投影法(FBP)在低剂量盆腔Ct(RD-APCt)中对急性左半结肠憩室炎(ALCD)诊断的效果。方法将进行过RD-APCt[Ct剂量容积指数(CtDIvol)为(11.2±4.2)m Gy]检查的25例疑似ALCD的病人纳入此项研究。原... 详细信息

摘要目的评价混合迭代重建算法(HIR)和滤过反投影法(FBP)在低剂量盆腔Ct(RD-APCt)中对急性左半结肠憩室炎(ALCD)诊断的效果。方法将进行过RD-APCt[Ct剂量容积指数(CtDIvol)为(11.2±4.2)m Gy]检查的25例疑似ALCD的病人纳入此项研究。原始数据经过FBP重建以及两种水平(i Dose4tML4和L6)的HIR重建。2位影像诊断医师对影像质量、影像噪声进行评估,评估者对ALVD征象的解读包括壁增厚、结肠周围脂肪间隙的炎症、结肠周脓肿、包裹性或

关键词：左半结肠憩室炎盆腔低剂量 Ct

治疗前肿瘤非球面性FDG摄取提供头颈部肿瘤的独立预后价值

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国际医学放射学杂志 2014年第6期 594-594页

作者： I.Apostolova I.G.Steffen F.Wedel A.Lougovski S.Marnitz t.derlin 侯文静 Department of Radiology and Nuclear Medicine Ottovon-Guericke University Clinic MagdeburgLeipziger Str.4430120 MagdeburgGermany

摘要目的提出一种称之为"非球面"(ASP)的新的FDG摄取空间不规则性的度量方法,将其作为头颈部原发肿瘤的预后标志物。方法 52例(首次发生肿瘤36例,复发16例)

关键词：头颈部肿瘤非球面头颈肿瘤 FDG 原发肿瘤

MR平扫精密监测马凡综合征病人的主动脉直径:2D SSFP成像与3D CE-MRA和超声心动图的个体内比较

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国际医学放射学杂志 2015年第3期 295-295页

作者： S.Veldhoen C.Behzadi t.derlin M.Rybczinsky Y.von Kodolitsch S.Sheikhzadeh 白维娴 Department of Diagnostic and Interventional Radiology University Medical Center Wurzburg

目的通过与在个体内进行的无心电门控的对比增强3D MR血管成像(CE-MRA)和超声心动图的比较,评估心电门控下无对比剂增强的2D稳态自由进动(SSFP)成像

关键词：超声心动图 CE-MRA 超声波诊断 MRA MR SSFP 主动脉大动脉马凡综合征显性遗传病病人

Imaging of multiple myeloma: Current concepts

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World Journal of Orthopedics 2014年第3期5卷 272-282页

作者： thorsten derlin Peter Bannas Department of Diagnostic and Interventional Radiology University Medical Center HamburgEppendorfDE-20246 HamburgGermany

Medical imaging is of crucial importance for diagnosis and initial staging as well as for differentiation of multiple myeloma(MM)from other monoclonal plasma cell *** radiography represents the reference standard for diagnosis of MM due to its wide availability and low costs despite its known limitations such as low sensitivity,limited specificity and its inability to detect extraosseous *** conventional radiography,newer cross-sectional imaging modalities such as whole-body low-dose computed tomography(Ct),whole-body magnetic resonance imaging(MRI)and18F-fluorodeoxyglucose(FDG)positron emission tomography(PEt)/Ct are available for the diagnosis of osseous and extraosseous manifestations of ***-body low-dose Ct is used increasingly,replacing conventional radiography at selected centers,due to its higher sensitivity for the detection of osseous lesions and its ability to diagnose extraosseous *** highest sensitivity for both detection of bone marrow disease and extraosseous lesions can be achieved with whole-body MRI and18F-FDG PEt/*** to current evidence,MRI is the most sensitive method for initial staging while18F-FDG PEt/Ct allows monitoring of treatment of *** is an evolving role for assessment of treatment response using newer MR *** studies are needed to further define the exact role of the different imaging modalities for individual risk stratification and therapy monitoring.

关键词： Multiple myeloma Plasmocytoma X-Ray Magnetic resonance imaging Diffusion-weighted imaging Positron emission tomography-computed tomography Imaging

transport mechanism in chemically reactive hybrid nanofluid flow containing gyrotactic micro-organisms over a curved oscillatory surface

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Applied Mathematics and Mechanics(English Edition) 2025年第1期46卷 177-192页

作者： M.NAVEED M.IMRAN t.ASGHAR Z.ABBAS Department of Mathematics Division of Science and TechnologyUniversity of Education Department of Mathematics The Islamia University of Bahawalpur

this paper examines the transport analysis, including both heat transfer and mass transfer, in hybrid nanofluid flow containing gyrotactic microorganisms towards a curved oscillatory surface. the influence of magnetic fields is also inspected in terms of their physical characteristics. to depict the phenomena of transport, modified versions of both Fick's and Fourier's laws are used. Additionally, the characteristics of both heterogeneous and homogeneous chemical reactions are also incorporated. Utilizing a curvilinear coordinate system, the flow problem is formulated as partial differential equations(PDEs)for momentum, concentration, microorganism field, and energy. An analytical solution to the obtained flow equations is achieved utilizing the homotopy analysis method(HAM).the effects of significant flow parameters on the pressure and microorganism fields, velocity, oscillation velocity, concentration, and temperature distributions are shown via graphs. Furthermore, the variations in skin friction, mass transfer rate, heat transfer rate, and local motile number due to different involved parameters are presented in tables and are analyzed in detail. Graphical results indicate that the curves of velocity and temperature fields are enhanced as the values of the solid volume fraction variables *** is also verified that the concentration rate field decreases as the values of the homogeneous reaction strength parameter and the radius of curvature parameter increase, and it increases with the Schmidt number and the heterogeneous reaction strength *** outcomes show a favorable response of the motile number to advanced values of the Peclet number, the Schmidt number, the microorganism difference parameter, and the bio-convective Lewis number.

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Free vibration and transient response of double curved beams connected by intermediate straight beams

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Applied Mathematics and Mechanics(English Edition) 2025年第1期46卷 37-62页

作者： R.A.JAFARI-tALOOKOLAEI H.GHANDVAR E.JUMAEV S.KHAtIR t.CUONG-LE School of Mechanical Engineering Babol Noshirvani University of Technology Department of Mechanical Engineering Faculty of Engineering New Uzbekistan University University of Business and Science Center for Engineering Application and technology Solutions Ho Chi Minh City Open University

this paper investigates the free vibration and transient response of interconnected structures including double curved beams and intermediate straight beams,which are all constructed from functionally graded porous(FGP) materials. the strain potential and kinetic energies of each beam along with the work done by the external force are calculated. Additionally, a higher-order beam element is introduced to derive stiffness and mass matrices, along with the force vector. the curved and straight beams are discretized, and their assembled stiffness, mass matrices, and force vectors, are *** conditions at the joints are used to derive the total matrices of the entire structure. Subsequently, the natural frequencies and transient response of the system are determined. the accuracy of the mathematical model and the self-developed computer program is validated through the comparison of the obtained results with those of the existing literature and commercial software ANSYS, demonstrating excellent ***, a comprehensive study is conducted to investigate the effects of various parameters on the free vibration and transient response of the considered structure.

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