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影像畸变
相关语句
  image distortion
     Application of Computer Simulation Technique in Establishing Satellite-Imaging Model and Studying Image Distortion Law
     计算机仿真技术在卫星成像模型建立及影像畸变规律研究中的应用
短句来源
  “影像畸变”译为未确定词的双语例句
     Maximalartifact was found in EPI images with approximately 44mm in diameter. Minimal artifact was found in PD and GREimages with a diameter of approximately 14mm.
     影像畸变在PD、GRE较小,直径约14mm, 在GE EPI畸变最大,约达44mm。
短句来源
     On GRE images, artifact was found in 6 slices, and maximal artifact was approximately 19mm in diameter.
     GRE影像畸变 (伪影 )涉及 6个扫描层面 ,最大直径约 19mm。
短句来源
     On GRE images, artifact was found in 6 slices, and maximal artifact was approximately 19 mm in diameter.
     GRE影像畸变 (伪影 )涉及 6个扫描层面 ,最大直径约 19mm。
短句来源
     It includes the correction of lens distortion of digital cameras, the computing of camera interior orientation parameters and pictures' exterior orientation parameters, and the evaluation of it's capability;
     其中包括普通数码影像畸变差的改正、数码相机内方位元素的检定、数码近景摄影机的研制及外方位元素改正值的确定、普通数码相机量测化性能评价;
短句来源
     In T1 images, artifact was found in 3slices, while 4 slices were affected in PD and GRE images.
     T1的影像畸变(伪影)涉及3个扫描层面;
短句来源
  相似匹配句对
     BEYOND THE MOVING IMAGE NEW DIRECTORS SERIES
     超越影像
短句来源
     Dual Images
     双重影像
短句来源
     In T1 images, artifact was found in 3slices, while 4 slices were affected in PD and GRE images.
     T1的影像畸变(伪影)涉及3个扫描层面;
短句来源
     A Distorted Image Rectification Algorithm Based on Least Square Image Matching
     基于最小二乘影像匹配的畸变图像矫正算法研究
短句来源
     Lattice Distortion in Diamonds
     金刚石的晶格畸变
短句来源
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  image distortion
Body image distortion in Anorexia Nervosa - is there really a perceptual deficit
      
A computer-based image distortion technique allowed distortion of the whole body and of body parts.
      
The SCSF is effective and efficient for image matching because it is independent of image distortion such as rotation and flip as well as it increases the matching accuracy.
      
A color balancing process restores the original color characteristics of the image based on learned associative memory matrices which eliminate image distortion due to improper recombination of red, green and blue components after enhancement.
      
Artifacts such as image distortion were related to the 20 Mhz mechanically rotating tip motion and caused a loss of image quality.
      
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Objective: To investigate the effects of the Ni-Cr alloy restorer on MR images. Methods: A casting Ni-Cralloy crown was put on a narcotized monkey's right upper lateral incisor. Then the monkey's head-and-neck was examinedwith a 2.0 T MR scanner. Four clinical routine scan sequences including spin echo (T1); fast spin echo (T2); proton density(PD); gradient echo (GRE) and one functional scan protocol (gradient echo planar image, GE EPI) were used to observethe effects of the Ni-Cr alloy crown on MR images. Results:...

Objective: To investigate the effects of the Ni-Cr alloy restorer on MR images. Methods: A casting Ni-Cralloy crown was put on a narcotized monkey's right upper lateral incisor. Then the monkey's head-and-neck was examinedwith a 2.0 T MR scanner. Four clinical routine scan sequences including spin echo (T1); fast spin echo (T2); proton density(PD); gradient echo (GRE) and one functional scan protocol (gradient echo planar image, GE EPI) were used to observethe effects of the Ni-Cr alloy crown on MR images. Results: 1.The casting crown was not dislocated during all the 5 scans.2. Metal artifact around the crown was found on all images with different size and shape. In the T1, T2, PD, GRE images,the artifacts were circular. While in the GE EPI images which were patch-shaped. In T1 images, artifact was found in 3slices, while 4 slices were affected in PD and GRE images. As for the T2 and EPI images, 5 slices were affected. Maximalartifact was found in EPI images with approximately 44mm in diameter. Minimal artifact was found in PD and GREimages with a diameter of approximately 14mm. Conclusions: 1.It is safe to receive a head-and-neck MRI examinationfor the patients with Ni-Cr alloy restorers.2. Ni-Cr alloy restorer results in distortion in all MR images. The distortion wasdifferent according to the scan sequence, which was less in the anatomical MR images than the functional MR images.

目的:探讨镍铬合金修复体对磁共振检查的安全性及准确性的影响。方法:为猴右侧上颌侧切牙制作、配戴镍铬合金铸造冠,用 2.0T Prestige MR扫描仪按临床常规进行5个常用序列(T1:自旋回波T1加权像;T2:快速自旋回波T2加权像;PD:快速自旋回波质子密度像;GRE:梯度回波T1加权像;GE EPI:单次激发平面回波成像)的头颈部扫描,观察镍铬合金铸造冠对图像的影响。结果:1. 铸造冠未出现脱位;2.铸造冠周围组织的影像在T1、T2、PD、GRE畸变为近似圆形的低信号金属伪影,在GE EPI畸变为大范围的不规则的片状信号失落;T1的影像畸变(伪影)涉及3个扫描层面;T2 、GE EPI波及5个层面;影像畸变在PD、GRE较小,直径约14mm, 在GE EPI畸变最大,约达44mm。结论:1.戴有镍铬合金修复体可安全接受头颈部MRI检查;2. 镍铬合金修复体使其毗邻组织的磁共振成像发生畸变,其累及范围因扫描序列而异,对MR解剖影像影响较小,对MR功能影像影响较大。

Based on the digital photos of a building's outline obtained by using non\|metric digital camera,the direct linear transformation(DLT)principle and procedure to calculate the unknown spatial coordinates.The distortion effect of the digital camera on the results is further discussed.By using this method,the skeleton model of a human body can be measured effectively.

介绍了应用基于非量测数字相机的近景摄影测量方法进行建筑物外形的测量 ,通过直接线性变换 (DLT)计算未知点的空间三维坐标 ,并探讨了数字影像畸变改正对解算结果的影响 ,应用此方法很好地解决了人体骨架模型的测量

AIM:To compare the effects between Gold alloy casting crown and Ni-Cr alloy crown on MRI.METHODS: A casting Gold alloy crown and a Ni-Cr alloy crown were put on a narcotized monkey's right upper lateral incisor respectively. Then the monkey′s head and neck was examined with a 2.0 T MRI scanner. Four clinical routine scanning sequences including spin echo (T1), fast spin echo (T2), proton density (PD),gradient echo (GRE) and one functional scan protocol (gradient echo planar image, GE EPI) were used to observe...

AIM:To compare the effects between Gold alloy casting crown and Ni-Cr alloy crown on MRI.METHODS: A casting Gold alloy crown and a Ni-Cr alloy crown were put on a narcotized monkey's right upper lateral incisor respectively. Then the monkey′s head and neck was examined with a 2.0 T MRI scanner. Four clinical routine scanning sequences including spin echo (T1), fast spin echo (T2), proton density (PD),gradient echo (GRE) and one functional scan protocol (gradient echo planar image, GE EPI) were used to observe the effects of the Gold alloy crown and the Ni-Cr alloy crown. RESULTS:The Gold alloy casting crown created no artifact on all the 5 scans.Metal artifact around the Ni-Cr alloy crown was found on all images with different size and shape. On the T1, T2, PD, GRE images, the artifacts were circular. On the GE EPI images which was patch-shaped. On GRE images, artifact was found in 6 slices, and maximal artifact was approximately 19mm in diameter. CONCLUSION: Gold alloy restorer doesn′t affect the veracity of MRI examination.Ni-Cr alloy restorer results in distortion on all MR images. The distortion was different according to the scan sequence.

目的 :研究金合金与镍铬合金铸造冠对磁共振检查准确性的影响。方法 :取猴右侧上颌侧切牙分别制作、配戴金合金、镍铬合金铸造冠 ,用 2 .0TPrestigeMR扫描仪按临床常规进行 5个常用序列 (T1:自旋回波T1加权像 ;T2 :快速自旋回波T2加权像 ;PD :快速自旋回波质子密度像 ;GRE :梯度回波T1加权像 ;GEEPI :单次激发平面回波成像 )的头颈部扫描 ,观察铸造冠对图像的影响。结果 :金合金冠无明显伪影形成 ;镍铬合金冠周围组织的影像在T1、T2、PD、GRE畸变为近似圆形的低信号伪影 ,在GEEPI畸变为不规则的片状信号失落 ;GRE影像畸变 (伪影 )涉及 6个扫描层面 ,最大直径约 19mm。结论 :金合金修复体不影响MRI检查的准确性 ;镍铬合金修复体使其毗邻组织的磁共振成像发生畸变 ,累及范围和影响程度因扫描序列而异。

 
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