螺距:沿螺旋线方向量得的,相邻两螺纹之间的距离。一般指在螺纹螺距中螺纹上相邻两牙在中径线上对应两点间的轴向距离。
医用X射线CT辐射剂量影响因素研究_检验诊断与实验室自动化 关键词】 多层CT;CT剂量指数;螺距;准直宽度 [gap=1947]Key words】 Multi-slice CT(MSCT); CT dose index; Pitch; Collimation
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螺距规 screw pitch gauge ; lead gauge ; thread pitch gauge
螺距角 [机] angle of pitch ; pitch angle
可调螺距式 adjustable-pitch ; pitch
有效螺距 [航] effective pitch ; [机] virtual pitch
等螺距 [机] uniform pitch ; constant pitch ; equal pitch ; equal spiral spacing
小螺距 [机] fine pitch
标准螺距 [机] standard pitch ; pitch ; normal pitch
视螺距 apparent pitch
可调螺距 adjustable pitch ; controllable pitch
The best post-processing parameters for direct scanning images and MPR images are slice thickness 0.6mm, pitch 1.5, reconstruction increment 50%, high-resolution algorithm.
对于骨关节CT图像,薄层厚、大螺距的组合优于大层厚、小螺距组合,最佳扫描参数为矩阵512×512,FOV310mm,螺距1.5,准直0.6mm;对于直接扫描图像和MPR图像,最佳后重建参数为层厚0.6mm,重建间隔50%,骨算法重建。
参考来源 - 64层CT骨关节图像后处理技术及临床价值研究In order to know the influence of the variable-pitch inducer to the centrifugal pump’s cavitation,the flow in the centrifugal pump is numerically calculated.
为明确前置变螺距诱导轮对离心泵汽蚀性能的影响,对前置变螺距的离心泵全流道进行了数值计算。
参考来源 - 变螺距高速诱导轮的汽蚀特性·2,447,543篇论文数据,部分数据来源于NoteExpress
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