“SUPER-RESOLUTION CURVE” AND IMAGE REG ISTRATION； A COMPLETE FAMILY OF SCALING FUNCTIONS: THE (a, τ)-FRACTIIONAL SPLINES；A Colnponent Representation of History-Based Parametric Modeling Data；A constrained guided...“SUPER-RESOLUTION CURVE” AND IMAGE REG ISTRATION； A COMPLETE FAMILY OF SCALING FUNCTIONS: THE (a, τ)-FRACTIIONAL SPLINES；A Colnponent Representation of History-Based Parametric Modeling Data；A constrained guided G{sup}1 continuous spline curce；A DNS algorithm using B-spline collocation method for compressible turbulent channel flow……展开更多
文摘目的比较3.0 T MRI 3种扫描序列对颈神经根成像的应用价值。材料与方法收集临床需要扫描颈椎MRI患者37例,均行常规序列、三维双回波稳态(three-dimensional double-echo steady state,3D-DESS)序列、多回波数据图像重合(multi-echo data image combination,MEDIC)序列、可变反转角三维快速自旋回波(3D sampling perfection with application optimized contrasts using different flip angle evolutions,3D-SPACE)序列扫描,所有图像均进行后处理重建,对图像质量和正常颈神经根显示、受压颈神经显示清晰度、颈神经根与邻近组织的对比噪声比(contrast noise ratio,CNR)3个方面进行评价。结果 3种扫描序列3个方面两两比较,3D-DESS序列神经根-椎体CNR和神经根-脑脊液CNR均高于MEDIC序列;3D-DESS序列神经根-椎体CNR高于3D-SPACE序列,而3D-DESS序列神经根-脑脊液CNR低于3D-SPACE序列;3D-SPACE序列神经根-脑脊液CNR高于MEDIC序列,3D-SPACE序列神经根-椎体CNR与MEDIC序列差异无统计学意义。图像质量评分3种序列两两对比差异均有统计学意义(P<0.05),3D-DESS序列优于MEDIC序列,而3D-SPACE序列图像质量最差。对受压神经根清晰度的显示,3D-DESS序列和MEDIC序列差异无统计学意义,两序列与3D-SPACE序列对比,差异均有统计学意义(P<0.05),即两序列均优于3D-SPACE序列。结论对于显示神经根结构和诊断神经根病变等方面,3D-DESS序列明显优于MEDIC序列和3D-SPACE序列,对颈神经根成像及颈神经根受压的临床诊断更具优势。
文摘“SUPER-RESOLUTION CURVE” AND IMAGE REG ISTRATION； A COMPLETE FAMILY OF SCALING FUNCTIONS: THE (a, τ)-FRACTIIONAL SPLINES；A Colnponent Representation of History-Based Parametric Modeling Data；A constrained guided G{sup}1 continuous spline curce；A DNS algorithm using B-spline collocation method for compressible turbulent channel flow……
