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重叠重建
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  overlapping reconstruction
     Results The optimal scanning parameters: 3.75 mm×4/11.25 mm,HQ mode, overlapping reconstruction rate 70% and STD reconstruction method.
     结果 ①采用探测器组合 3 .75mm× 4+ 11.2 5mm床速的组合方式 ,HQ扫描模式 ,重叠重建率 70 %及STD重建方式进行扫描和重建可获得表面光滑、伪影不明显、形态不失真的肝动脉CTA图像。
短句来源
     Conclusion When proper scanning and reconstructed parameters are used, MSCTA can provide high-quality images with more identifiable vessel branches. The optimized parameters obtained from this study include collimation width 4×2.5 mm, pitch 1.75 and 50% overlapping reconstruction. Both VR and MIP can well display the vessels.
     结论 MSCTA时选择适当的扫描重建参数 ,可以显示较多血管分支级数 ,获得较好的图像质量 ,其优化的条件为 :准直层厚 2 .5mm ,Pitch 1.75 ,5 0 %重叠重建 ,两种重建方法VR和MIP在显示血管方面无明显差别。
短句来源
     Materials and Methods: 39 patients with bone and joind diseases underwent thin slice scan wigh spiral CT. The obtained images were processed through overlapping reconstruction and bone algorithm reconstruction and then three dimensional reconstruction was compared through software functions.
     材料与方法:对于39例骨关节疾病患者进行螺旋CT薄层扫描,重叠重建及骨算法重建,然后通过软件功能行三维重建。
短句来源
     Conclusion Thinner collimation scanning, denser overlapping reconstruction and appropriate threshold are the key technical points for obtaining ideal 3 D skull images.
     结论 薄的层厚、重叠重建、适当的阈值可获得最佳的颅骨三维图像。
短句来源
     Conclusion:In spiral CT simulator scan,using overlapping reconstruction with thin slice is advisable in determining gross target volume of tumor.
     结论:在螺旋CT模拟扫描中,采用薄层的重叠重建在肿瘤靶区体积的制定中是切实可行的。
短句来源
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  overlapping slice reconstruction
     The effect of overlapping slice reconstruction on the longitudinal resolution in helical CT imaging
     重叠重建对螺旋CT纵向分辨力的影响分析
短句来源
     To improve the longitudinal resolution by overlapping slice reconstruction.
     针对螺旋CT中纵向分辨力有所下降这一现象,提出了通过重叠重建来改善螺旋CT图像的纵向分辨力。
短句来源
     Assuming that the slice sensitivity profile(SSP)can be approximated as a Gaussian distribution and that the standard deviation of the SSP can be computed according to slice-thickness formula,and the optimal setting is made. It is proved that overlapping slice reconstruction can improve the longitudinal resolution in spiral CT imaging.
     从螺旋CT的层灵敏度剖面线(SSP)为高斯曲线为出发点,采用SSP的标准偏差来表示纵向分辨力(层厚),并以此为依据推导了重叠重建的最优化的设置,实践证明,重叠重建可以提高螺旋CT的纵向分辨力。
短句来源
  reconstructed in overlapping
     The CT scan conditions were collimating width 3 mm, pitch 1.2~2.5, scanning speed 0.8 s/360°, the raw data of CT volume scan was reconstructed in overlapping rate 33%~67%. Then the images of CTVG were built using navigator software (GE AG, USA).
     方法 对 6 9例可疑胃部病变患者行胃不同气量充气后螺旋CT扫描 (准直器宽度 3mm ,螺距 1 2~ 2 5 ,扫描速度 0 8s/ 36 0°) ,以获得容积扫描数据 ,将原始数据进行重叠重建 (重建率 33%~ 6 7% ) ,再利用Navigator软件生成仿真胃内窥镜影像。
短句来源
     The CT scan conditions were collimating with 3~5 mm, pitch 1~2, the raw data of CT volume scan was reconstructed in overlapping rate 50 %~67 % .
     方法:使用Hispeed FX/i扫描机,扫描层厚3~5mm,螺距1~2,重叠重建率50%~67%。
短句来源
     Methods 44 patients proved pathologically and 4 normal volunteers were detected by volume scanning using helical CT(Hispeed Fx/i,GE). The CT scan parameters were:collimating width 3~5 mm,pitch 1~2,reconstructed in overlapping rate 50%~67%.
     方法 使用HispeedFX/i扫描机 ,扫描层厚 3~ 5mm ,螺距 1~ 2 ,重叠重建率 5 0 %~ 67%。
短句来源
  “重叠重建”译为未确定词的双语例句
     Result:The group of image with parameters of 3.75mm× 4/11.25mm, HQ, 50% relapsed reconstruction rate and bone reconstruction.
     结果:采用探测器组合3.75mm×4/11.25组合,120-140kV时,HQ扫描模式,重叠重建率50%及骨重建方式进行扫描,其它扫描参数不变时,50mA组影像可满足骨盆骨结构观察,为最低限量。
短句来源
     For PA-MSCTA, 30ml of 45% contrast was injected into PA(10ml/s), and scan started when 20ml had been injected, covering the range of mass(collimation: 1mm; 50% overlap reconstruction).
     PA-MSCTA方法是以10ml/秒速度注入45%的造影剂30ml,注入20ml时开始扫描。 扫描范围包括肿块上下界,准值1mm,50%重叠重建
短句来源
     The average luminal diameter of S1 was 2.65±0.69mm(2.0mm interval).Combining with practice, 50% overlapping was the best.
     2.0mm 时可观察S1最小支气管内径为2.65±0.69mm。 结合实际应用,当层厚3.2mm时以50%重叠重建为佳,层厚6.5mm时以69%重叠重建为佳。
短句来源
     There was no significant di fference among the CTVE images with p itch of 1.0,1.5and 2.0or overlap of recon structed sections of 0%,25%,50%and75%.
     (3)改变重叠重建率(层厚2mm、Pitch=1):重叠重建率分别为0%、25%、50%、75%时,各CTVE图像之间无显著性意义。
短句来源
     Coronal multiplanar reformations were obtained from the volume data sets with an effective thickness of 1mm or 3mm and a gap of a 0.5mm or 1.5mm.
     重建采用1mm及3mm有效层厚及0.5和1.5mm的50%重叠重建
短句来源
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  overlapping reconstruction
Despite different data processing methods, thin effective slice thicknesses and overlapping reconstruction increments are mandatory for detailed CT analysis of pulmonary embolism on the segmental and subsegmental level.
      
The purpose of this prospective study is to assess the reproducibility of 1.25-mm- and 2.5-mm-thickness images on prospective electrocardiograph-triggered 64-slice CT with respect to 2.5-mm-thickness images on spiral overlapping reconstruction.
      
The 2.5-mm prospective scan on volume or mass scoring shows variability of around 10%, comparable to 2.5-mm-thickness spiral overlapping reconstruction images.
      


Purpose: To discuss the applicable value of three - dimensional reconstruction techniqes in bone and join diseases. Materials and Methods: 39 patients with bone and joind diseases underwent thin slice scan wigh spiral CT. The obtained images were processed through overlapping reconstruction and bone algorithm reconstruction and then three dimensional reconstruction was compared through software functions. By rotating a three - di-mensional image and observing at an adequate angle, the stereofigure of a lesion...

Purpose: To discuss the applicable value of three - dimensional reconstruction techniqes in bone and join diseases. Materials and Methods: 39 patients with bone and joind diseases underwent thin slice scan wigh spiral CT. The obtained images were processed through overlapping reconstruction and bone algorithm reconstruction and then three dimensional reconstruction was compared through software functions. By rotating a three - di-mensional image and observing at an adequate angle, the stereofigure of a lesion and the relations between the lesion and the surrounding structure could be clearly observed. Results: Three - dimensional CT images in 39 cases were analyzed. skull and maxillofacial fracture(20 cases), fracture of thoracic vertebrae (3 cases), fracture of lumbar vertebrae(3 cases), fracture of shoulder joint(1 case), fracture of hip joint(3 cases), chronic osteomyelitis of femur(1 case), tuberculosis of thoracic spine (2 cases), retrograde affection of knee joint(1 case), elbow joint infection (2 cases), congenital deformity of cervical vertebrae and thoracic vertebrae (2 cases), multiple metastatic tumor of ankle joint and foot bones (1 case) were found in all patients. Conclusion: In comparing with an axial and two - dimensional image, the three-dimensional image with spiral CT image , can more direct observe the stereofigure of a lesion. Therefore, if was a supplement of two - dimensional images, especially when injury of skull maxillofacial region, Joint, hand and foot with complicated anatomic structures, spiral CT imaging with 3D reconstructions has an important role in the clinical diagnosis and treatment of these diseases.

目的:探讨螺旋CT扫描三维成像技术对骨关节疾病的临床应用价值。材料与方法:对于39例骨关节疾病患者进行螺旋CT薄层扫描,重叠重建及骨算法重建,然后通过软件功能行三维重建。通过旋转三维图像从最佳角度来观察病变的立体形态及其与周围结构的关系。结果:颅骨及颌骨骨折20例,胸椎骨折3例,腰椎骨折3例,肩胛骨骨折1例,髋关节骨折3例;左股骨慢性骨髓炎1例,胸椎结核2例,膝关节退行性变1例,肘关节感染2例,颈椎及胸椎先天畸形2例,踝关节合并足骨多发转移瘤1例。结论:螺旋CT扫描三维重建可作为横轴CT图像和二维图像的重要补充,它可更直观地显示病变的立体形态,尤其在解剖结构复杂的颅底、颌面、脊柱、关节、手和足疾病的诊断和临床治疗中有重要的指导作用。

Objective:To discuss the value of clinical application of 3-dimensional reconstruction techniques in diseases.Methods:53 patients underwent thin slice scan with spiral CT.The obtained images were processed through overlapping reconstruction consequently.Then through softwere functions 3-dimensional reconstruction was completed.By rotation of a 3-dimensional image to observe it at an any angle,we could make clear the stereofigure of a lesion and its relations with the surrounding structures.Results:3-dimensional...

Objective:To discuss the value of clinical application of 3-dimensional reconstruction techniques in diseases.Methods:53 patients underwent thin slice scan with spiral CT.The obtained images were processed through overlapping reconstruction consequently.Then through softwere functions 3-dimensional reconstruction was completed.By rotation of a 3-dimensional image to observe it at an any angle,we could make clear the stereofigure of a lesion and its relations with the surrounding structures.Results:3-dimensional CT images of 53 cases were analyzed,including trauma(31 cases),tumor(6 cases),infection(5 cases),retrograde affection of bone and joint diseases(5 cases),congenital deformity(4 cases),polip of gallbladder(1 case)and nomal colon(1 case).Conclusion:The 3-dimensional image can be a supplement of an axial and 2-dimensional CT image.By rotating it,we can observing the stereofigure of a lesion and its relations with the surrounding structions from an any angle.And it is an important guidance in making appropriate surgical treatment plans before the operations of skeletal and maxillofacial surgery and comparing preoperation with postoperation of disease.

目的:探讨螺旋CT扫描三维成像技术在临床疾病中的应用价值。方法:对于53例病人行螺旋CT薄层扫描,重叠重建(层厚3~5 m m ,间隔1~2.5 m m ),然后通过软件功能行三维重建(three- dim ensionalreconstruction,3D)。通过旋转三维图像从最佳角度来观察病变的立体形态及其周围结构关系。结果:外伤31 例,肿瘤6例,感染5 例,骨关节退行性变5例,先天畸形4 例,胆囊息肉1例,正常结肠1例。结论:螺旋CT扫描三维重建(3DCT)可作为横轴图像和二维重建图像的重要补充,它可更直观地显示病变的立体形态。对于骨外科、口腔颌面外科手术前制定治疗计划和术前、术后对比均有重要的指导作用

Objective To obtain the best 3 D images by optimizing the scanning and reconstruction parameters of skull spiral CT.Materials and Methods Spiral CT scanning with different collimations, bed speed and pitch was performed in 2 dry skulls, 2 cadaveric heads and 2 normal volunteers. 3 D images were obtained by surface shaded display (SSD) with different thresholds, and were compared with each other.Results The comparison of 3 D images using different scanning parameters showed that the thinner the collimation...

Objective To obtain the best 3 D images by optimizing the scanning and reconstruction parameters of skull spiral CT.Materials and Methods Spiral CT scanning with different collimations, bed speed and pitch was performed in 2 dry skulls, 2 cadaveric heads and 2 normal volunteers. 3 D images were obtained by surface shaded display (SSD) with different thresholds, and were compared with each other.Results The comparison of 3 D images using different scanning parameters showed that the thinner the collimation was, the closer to the actual size of the skull the 3 D image would be. Higher pitches did not affect the image and, when used, collimation could be further reduced. When the lowest threshold, at which soft tissue couldn't show up, was used, and when reconstruction was done by interval which was non integer of collimation, the best quality images could be obtained.Conclusion Thinner collimation scanning, denser overlapping reconstruction and appropriate threshold are the key technical points for obtaining ideal 3 D skull images.

目的 通过对颅骨螺旋CT扫描和三维重建参数的选择 ,以获得最佳三维图像。材料与方法 采用干颅、尸头颅各 2个及 2位正常志愿者 ,采用不同层厚和床速的螺旋CT扫描 ,并行不同间隔、不同阈值的表面阴影显示法 (surfaceshadeddisplay ,SSD)三维重建。结果 比较不同扫描参数获得的三维图像 ,发现层厚越薄 ,三维图像越接近实物的实际大小 ,提高螺距不会影响图像的质量 ,且能达到降低层厚的目的 ,用非层厚的整除数间隔重叠重建 ,选择软组织不能成像的最低阈值 ,图像效果最佳。结论 薄的层厚、重叠重建、适当的阈值可获得最佳的颅骨三维图像。

 
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