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双能量多层Ct及其后处理技术对肾结石的评价:肾结石成分特征的实验研究

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国际医学放射学杂志 2009年第3期 280-281页

作者： d.t.boll N.A.Patil E.K.Paulson E.M.Merkle W.N.Simmons S.A.Pierre 梅习龙 department of Radiology Duke University Medical Center

目的以体外肾结石波谱作参考标准,前瞻性评价双能多层Ct先进的同步无创性人性化后处理技术显示人类肾结石的特征的能力。方法 50例肾结石,30例为单结晶成分(尿酸、胱氨酸、磷酸铵、草酸钙、磷酸钙、磷酸氢钙),20例为多结晶成分。采用64... 详细信息

目的以体外肾结石波谱作参考标准,前瞻性评价双能多层Ct先进的同步无创性人性化后处理技术显示人类肾结石的特征的能力。方法 50例肾结石,30例为单结晶成分(尿酸、胱氨酸、磷酸铵、草酸钙、磷酸钙、磷酸氢钙),20例为多结晶成分。采用64层双能Ct,从像素到像素的后处理算法是利用其低能和高能上医学数据灰阶编码比率相对差异来产生数字成像和通讯。

关键词：后处理技术双能肾结石肾石病 Ct 成分特征

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量化放射住院医师的疲劳度：初步分析报告

国际医学放射学杂志 2021年第3期44卷 353-353页

作者： J.Vosshenrich P.Brantner J.Cyriac d.t.boll E.M.Merkle t.Heye. 杨淑杰

摘要过去几十年放射科的工作负荷在不断增加,由此导致的放射医生的疲劳被认为是影响诊断准确度的日益增长的问题。目的探讨日常班与轮班制的报告相似度趋势可

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Chebyshev polynomial-based Ritz method for thermal buckling and free vibration behaviors of metal foam beams

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Applied Mathematics and Mechanics(English Edition) 2024年第5期45卷 891-910页

作者： N.d.NGUYEN t.N.NGUYEN Faculty of Civil Engineering Ho Chi Minh City University of Technology and EducationHo Chi Minh City 71309Viet Nam Faculty of Engineering and technology Kien Giang UniversityChau Thanh 92000Viet Nam

this study presents the Chebyshev polynomials-based Ritz method to examine the thermal buckling and free vibration characteristics of metal foam *** analyses include three models for porosity distribution and two scenarios for thermal *** material properties are assessed under two conditions,i.e.,temperature dependence and temperature *** theoretical framework for the beams is based on the higher-order shear deformation theory,which incorporates shear deformations with higher-order *** governing equations are established from the Lagrange equations,and the beam displacement fields are approximated by the Chebyshev *** simulations are performed to evaluate the effects of thermal load,slenderness,boundary condition(BC),and porosity distribution on the buckling and vibration behaviors of metal foam *** findings highlight the significant influence of temperature-dependent(td)material properties on metal foam beams'buckling and vibration responses.

关键词： Ritz method Chebyshev function buckling vibration metal foam beam higher-order beam theory(HOBt)

Near resonance vibration isolation on a levered-dual response(LEdAR)Coulomb-damped system by differential preloads/offsets in linear springs

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Applied Mathematics and Mechanics(English Edition) 2024年第6期45卷 1033-1050页

作者： t.I.tOLUWALOJU C.K.tHEIN d.HALIM department of Mechanical Materials and Manufacturing EngineeringUniversity of Nottingham Ningbo ChinaNingbo 315100Zhejiang ProvinceChina Nottingham Ningbo China Beacons of Excellence Research and Innovation Institute University of Nottingham Ningbo ChinaNingbo 315048Zhejiang ProvinceChina

the levered-dual response(LEdAR)Coulomb-damped system attains near resonant vibration isolation by differential preloads/offsets in linear *** takes the advantages of both the preloads/offsets in linear springs and the guiderail friction for realizing different levels of vibration *** isolation capacities are investigated on the strategies with both the horizontal and vertical guiderails,with the horizontal rail only,and without *** compressive preloads generally result in the consumption of most of the initial excitation energy so as to overcome the potential *** isolation onsets at the frequency ratio of 1∓0.095 on the left-hand side(LHS)and the right-hand side(RHS)of the lever are relative to the load plate *** observed near resonant isolation thus makes the LEdAR system a candidate for the isolation of the mechanical systems about resonance while opening a path for simultaneous harvesterisolation functions and passive functions at extreme frequencies.

关键词： lever ratio Coulomb damping preload tension/compression isolation band/depth offset potential

腹部3.0t扩散加权成像表观扩散系数测定的短期和中期可重复性研究

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国际医学放射学杂志 2009年第2期32卷 188-188页

作者： A.C.Braithwaite B.M.dale d.t.boll E.M.Merkle 范丽 department of Radiology Duke University Medical Center

目的验证健康人群扩散加权成像（dWI）表观扩散系数（AdC）测定的中短期可重复性无明显差异的假设。方法 20名健康男性志愿者签署了知情同意书后纳入了此项前瞻性的机构审查委员会批准的研究。在3．0tMR设备上进行5个横断面腹部dWI（... 详细信息

目的验证健康人群扩散加权成像（dWI）表观扩散系数（AdC）测定的中短期可重复性无明显差异的假设。方法 20名健康男性志愿者签署了知情同意书后纳入了此项前瞻性的机构审查委员会批准的研究。在3．0tMR设备上进行5个横断面腹部dWI（1期）。平均（147±20）d之后，16人再次在同一设备采用相同的扫描方案进行了腹部dWI（2期）。

关键词：表观扩散系数扩散加权成像可重复性腹部测定中期 MR设备知情同意书

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双能MdCt对肾脏病变的评估

国际医学放射学杂志 2014年第2期 196-196页

作者： A.Mileto d.Marin R.C.Nelson G.Ascenti d.t.boll 林琳 department of Radiology Duke University Medical Center

随着横断面成像的发展,偶然发现肾脏病变的数目增加。多层Ct(MdCt)是描述和分期肾脏病变的首选检查方法。虽然大多数病变能够明确地诊断,但有些肾脏病变通

关键词：多层Ct 双能Ct 肾脏病变肾细胞癌对比增强

心脏双源多层Ct评估仿人类心脏运动模具的血管钙化斑块标本

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国际医学放射学杂志 2008年第A6期31卷 498-498页

作者： d.t.boll E.M.Merkle E.K.Paulson R.A.Mirza t.R.Fleiter 李芳 department of Radiology Duke University Medical Center DUMC 3808 Durham NC27710.

目的评估心脏双源多层Ct及其图像后处理技术是否可以比单源多层Ct能更准确地对钙化斑块进行定量评估,以光学相干断层成像(optical coherence tomography,OCt)

关键词：心脏运动钙化斑块图像后处理技术单源 coherence 参照标准双能探测器阵列数据集计

Advancing Wound Filling Extraction on 3d Faces:An Auto-Segmentation and Wound Face Regeneration Approach

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Computer Modeling in Engineering & Sciences 2024年第5期139卷 2197-2214页

作者： duong Q.Nguyen thinh d.Le Phuong d.Nguyen Nga t.K.Le H.Nguyen-Xuan department of Mathematics and Statistics Quy Nhon UniversityQuy Nhon City55100Viet Nam Applied Research Institute for Science and technology Quy Nhon UniversityQuy Nhon City55100Viet Nam CIRtECH Institute HUTECH UniversityHo Chi Minh City72308Viet Nam

Facial wound segmentation plays a crucial role in preoperative planning and optimizing patient outcomes in various medical *** this paper,we propose an efficient approach for automating 3d facial wound segmentation using a two-stream graph convolutional *** method leverages the Cir3d-FaIR dataset and addresses the challenge of data imbalance through extensive experimentation with different loss *** achieve accurate segmentation,we conducted thorough experiments and selected a high-performing model from the *** selectedmodel demonstrates exceptional segmentation performance for complex 3d facial ***,based on the segmentation model,we propose an improved approach for extracting 3d facial wound fillers and compare it to the results of the previous *** method achieved a remarkable accuracy of 0.9999993% on the test suite,surpassing the performance of the previous *** this result,we use 3d printing technology to illustrate the shape of the wound *** outcomes of this study have significant implications for physicians involved in preoperative planning and intervention *** automating facial wound segmentation and improving the accuracy ofwound-filling extraction,our approach can assist in carefully assessing and optimizing interventions,leading to enhanced patient ***,it contributes to advancing facial reconstruction techniques by utilizing machine learning and 3d bioprinting for printing skin tissue *** source code is available at https://***/SIMOGroup/WoundFilling3d.

关键词： 3d printing technology face reconstruction 3d segmentation 3d printed model

采用基于心电门控技术的多层螺旋Ct血管成像可变及相干运动模型获得主动脉壁压力区域图的可行性研究

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国际医学放射学杂志 2016年第5期 566-566页

作者： A.Mileto t.J.Heye R.A.Makar L.M.Hurwitz d.Marin d.t.boll 卢小婷 department of Radiology Duke University Medical Center

摘要目的研究建立基于心电门控技术的多层螺旋Ct血管成像的可变及相干运动模型用于胸主动脉的可行性,评估主动脉壁压力的定量分析是否可以作为病人心血管参数的一个特异性指标。材料与方法本研究经伦理委员会审批,符合HIPAA。前瞻性纳入... 详细信息

摘要目的研究建立基于心电门控技术的多层螺旋Ct血管成像的可变及相干运动模型用于胸主动脉的可行性,评估主动脉壁压力的定量分析是否可以作为病人心血管参数的一个特异性指标。材料与方法本研究经伦理委员会审批,符合HIPAA。前瞻性纳入250例心电门控双源多层螺旋Ct

关键词：心电门控血管成像主动脉壁多层螺旋运动模型 Ct