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实时三维超声
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  four-dimensional ultrasound
     Results: The accuracy of four-dimensional ultrasound was 100%,while that of two-dimensional ultrasound was 85.7% between 14 to 24 weeks of gestation.
     结果:37例畸形中,21例孕14~24周有体表结构畸形的胎儿,产前二维、实时三维超声诊断符合率分别为85.7%、100%;
短句来源
     Preliminery evaluation of four-dimensional ultrasound in the diagnosis of surface deformity in fetus
     实时三维超声在诊断胎儿体表结构畸形中作用的初步研究
短句来源
     Objective: To assess the value of four-dimensional ultrasound in the diagnosis of surface deformity in fetus.
     目的:探讨实时三维超声在诊断胎儿体表结构畸形中的临床应用价值。
短句来源
     Conclusion: Four-dimensional ultrasound can offer more plentiful diagnostic infor-mation than two-dimensional ultrasound,and can diagnose fetal malformation early.
     16例孕25~42周有体表畸形的胎儿,产前二维、实时三维超声诊断符合率无明显差别,均为100%。 结论:实时三维超声可直观显示胎儿的结构情况,可以较早诊断胎儿的体表结构畸形,准确性优于二维超声。
短句来源
  real-time three-dimensional ultrasound
     Application of Transparent Mode Real-Time Three-dimensional Ultrasound in Cholecystic Diseases
     实时三维超声透明模式在胆囊疾病中的应用
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     Results: Measurements of real-time three-dimensional ultrasound correlated well with actual volumes(r2>0.90), and there was no significant difference between them(P>0.05);
     结果:在水囊及成人膀胱容积测量,实时三维超声不同平面间角度与实际值均呈正相关(r2>0.90),两者无显著性差异(P>0.05);
短句来源
     Methods: Ten rubber-bursa like bladder and 33 bladders of healthy volunteers underwent real-time three-dimensional ultrasound, and volume were calculated with different inter-plan angles(6°, 9°, 15°, 30°) with the analysis software of real-time three-dimensional ultrasound.
     方法:使用实时三维超声采集10个模拟膀胱的橡胶水囊及33例正常成人的膀胱“锥形”三维数据库,应用其容积分析软件,用不同旋转角度:6°,9°,15°,30°测量水囊及膀胱容积;
短句来源
     Initial study of measuring bladder volume by real-time three-dimensional ultrasound
     实时三维超声测量膀胱容积的初步探讨
短句来源
     Measurement errors of real-time three-dimensional ultrasound were less than those of two-dimensional ultrasound significantly.
     实时三维超声测量误差较二维超声明显为小(P<0.05)。
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  “实时三维超声”译为未确定词的双语例句
     Results Observation by RT-3DE, en-face view of atrial-ventricular(S2a) and en-face view of left ventricular septum(L1a) provided relatively ideal section planes in sub-arterial ventricular septal defect, S2a and en-face view of right ventricular septum(L2a) provided relatively ideal section planes in perimembranous and muscular VSD.
     结果 实时三维超声观察干下型室间隔缺损时心室短轴剖视面 (S2a)与左心长轴正对室间隔剖视面 (L1a)为较为理想的剖视面 ,观察膜周部及肌部室间隔缺损时S2a与右心长轴正对室间隔剖视面 (L2a)为较为理想的剖视面。
短句来源
     The maximal areas of plaques derived from RT-3D ultrasonography and 2D were (0.34±0.16) cm2 and (0.19±0.12) cm2 respectively (P<0.01). There was a high correlation between the maximal areas of plaques by 2D and by RT-3D ultrasonography (r2 =0.65,P<0.01).
     实时三维超声测量斑块最大面积为(0.34±0.16)cm2,二维超声测量斑块最大面积为(0.19±0.12)cm2,测值差异具有统计学意义(P<0.01),两种技术测量的斑块面积存在高度正相关(r2=0.65,P<0.01)。
短句来源
     For bladder volume, 30° inter-plane angle method was the best choice for diagnosing accuracy and convenience.
     临床应用实时三维超声测量膀胱容积时,选择平面间角度30°即可提供足够信息,为兼顾准确与简便的最佳选择。
短句来源
     In addition, RT-3D ultrasonography could measure the volume of plaque (0.18±0.11) cm3. Conclusion RT-3D ultrasonography provides a new method in quantitative and qualitative diagnosis of carotid atherosclerosis.
     三维超声定量斑块的体积为(0.18±0.11)cm3。 结论实时三维超声在颈动脉粥样硬化斑块的定性及定量方面提供了新的方法。
短句来源
     Methods Live-three-dimensional(live-3D),full vo lume three-dimensional echocardiography (FV-3DE) and Real-time three-dimensional color Doppler echocar diography(RT-3CDE) in Philips Sonos 7500 were performed on twenty-six cases (19 male,7 female, mean age 63.8±10.2 years)with permanent pacemaker implantartion.
     方法对26例(男性19例,女性7例,平均年龄63.8±10.2岁)已安置单腔和/或双腔人工心脏起搏器的患者,启动实时三维超声显像(Live-3DE),实时三维彩色多普勒显像(RT-3CDE)和全容量三维超声显像(FV-3DE)等功能,观察分析起搏电极在右心房、右心室的位置以及与三尖瓣结构的关系。
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  four-dimensional ultrasound
Two-, three- and four- dimensional ultrasound recorded cough, huff, muscle morphology and PFM contraction, respectively.
      


With the development of digital beam forming technique, the research in digital multi-beamforming technique and its application have become the advanced science and technology in the world. The digital beam forming technique can improve the contrast, lateral and axial resolution of ultrasound imaging equipment. The digital multi-beamforming technique can improve the time resolution and take further steps in the lateral resolution. It lays a good foundation on real-time and quasi-real time 3D ultrasound imaging...

With the development of digital beam forming technique, the research in digital multi-beamforming technique and its application have become the advanced science and technology in the world. The digital beam forming technique can improve the contrast, lateral and axial resolution of ultrasound imaging equipment. The digital multi-beamforming technique can improve the time resolution and take further steps in the lateral resolution. It lays a good foundation on real-time and quasi-real time 3D ultrasound imaging as well.

随着数字声束形成技术的发展,数字多声束形成技术的研究和应用已成为当今国际前沿科技。数字声束形成技术可以提高超声成像设备的对比分辨力、横向和纵向分辨力。数字多声束形成技术可提高成像设备的时间分辨力,进一步提高横向分辨力。同时,它为实时和准实时三维超声成像奠定了良好的基础。

This review article summarized the basicmethodology and its recent progress in the three - dimen-sional (3D) ultrasonic imaging of the static structures. The principle of 3D ultrasonic imaging: in the earlyperiod, two modeling methods were used for 3D ultrasonicreconstruction: constructive solid geometry (CSG - mod-eling) and boundary representation (B - rep). The newlydeveloped voxel space modeling becomes the most idealmodeling strategy for 3D ultrasonic reconstruction. It al-lows the reconstruction of all...

This review article summarized the basicmethodology and its recent progress in the three - dimen-sional (3D) ultrasonic imaging of the static structures. The principle of 3D ultrasonic imaging: in the earlyperiod, two modeling methods were used for 3D ultrasonicreconstruction: constructive solid geometry (CSG - mod-eling) and boundary representation (B - rep). The newlydeveloped voxel space modeling becomes the most idealmodeling strategy for 3D ultrasonic reconstruction. It al-lows the reconstruction of all information of the scannedobject and the demonstration of the anatomical details,and therefore has the greatest clinical potentialities. The procedure of 3D ultrasonic reconstruction: thebasic steps include data acquisition, post - processing ofthe data, 3D reconstruction, demonstration of the 3Dimage and quantitative measurement. Data acquisition: (1 ) mechanically driven scanningis the conventional method of data acquisition, includingparallel scanning, fan scanning and rotating scanning.However it has many difficulties in its clinical applica-tion. (2) Free - hand scanning can avoid the limitationsof the above methods, this new technique is representedby the acoustical positioning system, optical positioningsystem and electromagnetic positioning system. The lastsystem is the most mature and practical one at the presenttime. (3) 3D Volume transducer (an assembly of a 2Dtransducer with a small step motor) can produce ho-mogenous resolutions and geometrical correctness withautomatic 3D volume scanning and shorter scanning time.(4) 3D Electronic phased array transducer, for examplewith 128×128 crystals, can produce real - time 3D im-age. Post - processing of the data: after a series of se-quential two - dimensional images obtained, the computerdefines the position of each frame in the 3D space, in-terpolates the gaps between the every two adjacentframes, smoothens all the images and finally forms a 3Ddata volume. 3D reconstruction: by means of the continuous par-allel cutting or oblique cutting of the data volume, a ref-erence plane is defined, and a 3D image of the structureof interest is reconstructed. Demonstration of 3D image: (1 ) dynamic show of3D image: usually the depth perception and the spatialrelationship of different structures are not so clear withsingle static 3D image, but they can be greatly enhancedwhen rotated views are displayed. (2) Transparent viewof the object: by using a special algorithm in 3D recon-struction, the gray - scale image can be thinned, and thetissue become transparent, therefore the structure withhigher gray scale value inside the parenchyma organs canbe showed, and also the image of the surrounding struc-tures can be showed, and also the image of the sur-rounding structures can be partially maintained. In thisway the spatial relationship of the inner structures can beobserved. The Echo - Scan of TomTec Company recon-structs and demonstrates the inner structures of theparenchyma organ by displaying the maximal gray scalevalue along each ultrasound beam throughout the datavolume. Quantitative measurement: with 3D reconstructiontechnique, the volume of any irregular structure can beaccurately measured without any hypothesis about thegeometrical shape of the structure. The 3D ultrasonic reconstruction could demonstratethe stereo shape and inner structures of the scanned ob-ject, the spatial relationship of different structures, thesurface features, and accurately measure the volume, andtherefore provide very useful information for the diagnosisand treatment of the related diseases.

本文旨在对静态结构三维超声成像的方法及进展做一综述。基本原理:早期三维超声成像曾采用立体几何构成法及表面轮廓提取法。近年来研制出体元模型法,可对组织结构的所有信息进行重建,具有灰阶特征,可显示解剖细节,是目前最具临床使用价值的新技术。 基本步骤:三维超声成像的步骤包括图像的采集、后处理、三维重建、三维图像的显示和定量测定。 图像的采集:扫查采样方式有以下几类:①机械驱动扫查:常见形式有平行扫查、扇形扫查及旋转扫查。机械驱动扫查采样过程繁琐复杂,限制了三维超声成像在临床上的推广应用;②自由扫查技术:自由扫查技术可以避免机械驱动扫查的诸多缺点,常见方式有声学定位自由扫查、光学定位自由扫查及磁场空间定位自由扫查,其中磁场空间定位自由扫查技术较成熟和实用。使用自由扫查技术,可以随意在任何方向上移动探头,扫查采样方便灵活;③“一体化探头”方案:将超声探头和摆动机构封装在一起,操作者只要将此一体化探头指向所需探测的部位,系统就能自动采集三维数据。④三维电子相控阵方法:目前已开发出128×128阵元的超声探头,能进行实时三维超声成像。 图像的后处理:计算机对按照一定规律采集的一系列分立二维图像进行空间定位,并对...

本文旨在对静态结构三维超声成像的方法及进展做一综述。基本原理:早期三维超声成像曾采用立体几何构成法及表面轮廓提取法。近年来研制出体元模型法,可对组织结构的所有信息进行重建,具有灰阶特征,可显示解剖细节,是目前最具临床使用价值的新技术。 基本步骤:三维超声成像的步骤包括图像的采集、后处理、三维重建、三维图像的显示和定量测定。 图像的采集:扫查采样方式有以下几类:①机械驱动扫查:常见形式有平行扫查、扇形扫查及旋转扫查。机械驱动扫查采样过程繁琐复杂,限制了三维超声成像在临床上的推广应用;②自由扫查技术:自由扫查技术可以避免机械驱动扫查的诸多缺点,常见方式有声学定位自由扫查、光学定位自由扫查及磁场空间定位自由扫查,其中磁场空间定位自由扫查技术较成熟和实用。使用自由扫查技术,可以随意在任何方向上移动探头,扫查采样方便灵活;③“一体化探头”方案:将超声探头和摆动机构封装在一起,操作者只要将此一体化探头指向所需探测的部位,系统就能自动采集三维数据。④三维电子相控阵方法:目前已开发出128×128阵元的超声探头,能进行实时三维超声成像。 图像的后处理:计算机对按照一定规律采集的一系列分立二维图像进行空间定位,并对相邻切面之间的空隙进行像素插补平滑,形成一个?

Objective:To determine the relationship of tricuspid annulus(TA)motion and right ventricular(RV)function using real time three dimensional echocardiography(3DE) Methods:3DE data sets(Volumetrics,Inc)were acquired from 14 normal volunteers,7 orthotopic cardiac recipients,3 dilated cardiomyopathy,2 coronary disease,and 1 patient with congenital heart disease After transfered to a computer,3DE data was segmented into 9 rotational apical planes(20° apart) TA location was identified in spatial(x,y,z)coordinates...

Objective:To determine the relationship of tricuspid annulus(TA)motion and right ventricular(RV)function using real time three dimensional echocardiography(3DE) Methods:3DE data sets(Volumetrics,Inc)were acquired from 14 normal volunteers,7 orthotopic cardiac recipients,3 dilated cardiomyopathy,2 coronary disease,and 1 patient with congenital heart disease After transfered to a computer,3DE data was segmented into 9 rotational apical planes(20° apart) TA location was identified in spatial(x,y,z)coordinates by viewing the tricuspid leaflet hinge points in each plane at end diastole and end systole,We calculated the change in annular area,circumference,and motion along the long axis of the RV C plane from 3DE was used to measure RV ejection fraction(EF)which ranged from 21 to 63% Results:TA motion averaged 15mm,TA area change 17 7%,and TA circumference change 33 3% RV EF correlated well with TA motion(y=2 2x+15 5, r =0 88, P <0 01)but did not correlate with change in TA area or circumference Conclusion:TA motion by realtime 3D echo is a useful method to assess RV ejection fraction

目的 :应用实时三维超声心动图检查分析三尖瓣环运动和右室收缩功能的关系。方法 :2 7例包括健康志愿者 1 4例 ,接受心脏移植术后患者 7例 ,扩张型心肌病 3例 ,冠心病 2例 ,先天性心脏病 1例 ,所有实验对象均接受三维超声检查。将采集的实时三维图像转移至计算机图像分析仪上。从心尖将右心室三维图像沿右室长轴分成 9个切面 (每个切面间隔 2 0度 )。在舒张末期及收缩末期分别标定出三尖瓣环三维空间位置。计算机描绘并测量出不同时期三尖瓣环面积、周长及运动距离。利用实时三维超声的 C—平面 ,我们测量出三维超声的右心室舒张末期及收缩末期容积 ,并计算出右室射血分数。结果 :右心室射血分数平均为 48% (2 1 %~ 6 3% )。三尖瓣环空间运动距离为 1 5 mm。三尖瓣环面积改变为 1 7.7% ,周长改变为 33.3%。右室射血分数与三尖瓣环运动距离有很好的相关性 (y=2 .2 x+1 5 .5 ,r=0 .88,P<0 .0 1 ) ,但与瓣环的面积及周长改变无关。结论 :用三尖瓣环运动距离来评价右室收缩功能是一种有用的方法。

 
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