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- Four dimensional ultrasound imaging of heart 心脏四维超声波成象术
- ObjectiveTo analyze the value of three dimensional ultrasound imaging in synovium lesions of suprapatellar bursa. 目的探讨三维超声成像在评价髌上囊滑膜病变中的应用价值。
- Results:The color Doppler is much better than the dimensional ultrasound B in the centesis of kidney cysts. 结果:彩色多普勒在肾囊肿穿刺治疗抽液或注液时,观察穿刺针情况明显优于二维B超。
- Methods This study included 89 cases with cholecystic diseases using real time three dimensional ultrasound. 方法使用实时三维超声对89例胆囊疾病诊断。
- Objective:To detect the value of two dimensional ultrasound and color Doppler ultrasound(CDU) in diagnosing parathyroid adenoma(PTA) and complication. 目的 :探讨彩色多普勒超声 (CDU)诊断甲状旁腺腺瘤 (PTA)及其并发症的价值。
- I was seeing in four dimensions at once. 我同时看到四个维度。
- Objective:To determine practical value of three dimensional ultrasound imaging(3-DUSI)in quantitative analysis of bladder tumor mass. 目的:评价三维超声在膀胱肿瘤定量分析的准确性和临床应用价值。
- A new color video coding method whichcombines 4D-MDCT and four dimensional intra prediction is proposed. 该文基于4D-MDCT并结合四维帧内预测技术提出了一种彩色视频编码的新方法。
- Methods To observe and analyze fetal each planes of echogram and fetal umbilical blood velocity parameter by two dimensional ultrasound and CDFI. 方法利用二维超声(2D)和彩色多普勒血流图(CDFI),仔细观察分析胎儿各超声切面图像及分析胎儿脐动脉血流流速曲线参数。
- The math behind Quaternions involves four dimensional linear algebra, which is very difficult to understand. 四元组的数学意义是一个较难理解的四维线性代数。
- Methods:Two dimensional ultrasound image scanning by free hand was reconstructed stereoscopically in 39 patients with various kinds of disease. 方法:本文采用自由臂三维超声成像方法对39例各种疾病的患者进行了三维图像重建。
- Objective To detect the diagnostic value of two dimensional ultrasound and color Doppler flow imaging (CDFI )in thyroid disease. 目的:探讨二维超声与彩色多普勒血流显像(CDFI)对甲状腺疾病的诊断价值。
- Using the Gauss-Bonnet theorem, Stephen Hawking proved that the topology of the event horizon of a (four dimensional) black hole is a 2-sphere. 使用高斯-博内定理,史蒂芬·霍金证明一个(四维)黑洞活动视界的拓扑结构是2个球体。
- Objective This article discusses the application value of the transparent mode of real time three dimensional ultrasound in cholecystic diseases. 目的探讨实时三维超声透明模式在胆囊疾病中的应用价值。
- Specified by or exhibiting four dimensions, especially the three spatial dimensions and single temporal dimension of the relativity theory. 四维的,四度空间的由四维确定或表现的,尤指三个空间维度和相对理论中的时间维度
- By analogizing the coordinate conversion of two-dimensional plane,we turn the Minkowski four dimensional space,and deduce the Lorentz transformation. 转动闵可夫斯基四维空间,类比二维平面坐标系转动的坐标变换关系,导出洛伦兹变换关系。
- MethodsThe images of 36 suprapatellar bursas in 25 patients with synovium lesions were reconstructed stereoscopically by using three dimensional ultrasound imaging technique. 方法采用三维超声成像技术对25例患者的36个髌上囊滑膜病变进行三维图像重建。
- The modulated vector and the four dimensional index of all Bragg reflections of incommensurately modulated structures were determined. 据此对单晶衍射数据进行了四维空间的指标化。
- Results Fifteen were found to be the gastrointestinal cancer by two dimensional ultrasound and thirteen were correct, with correctable rate being 76. 67 %. 结果:共检出消化道肿瘤15例,与临床符合13例,诊断符合率为76。
- Examples of the absoluteness include the principle of invariance for velocity of light, the principle of special relativity, the principle of general relativity, eigenlength, eigentime, Minkowski four dimensional space-time. 在教学中常常强调其中的”相对”,而忽视了相对论中还有“绝对”的一面,如光速不变原理、狭义相对性原理、广义相对性原理、本征长度、本征时间、闵可夫斯基四维时空等都具有绝对性。