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实时三维
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  real-time three-dimensional
    Objective To evaluate the feasibility and accuracy of real-time three-dimensional echocardiography(RT-3DE)for quantifying left ventricular volume(LVV)and left ventricular mass(LVM).
    目的探讨实时三维超声心动图(RT-3DE)测量左室容积及心肌质量的可行性及准确性。
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    Objective To evaluate changes of left ventricular volume of stunned and infarcted myocardium in canine models during dobutamine stress echocardiography(DSE) by real-time three-dimensional echocardiography(RT-3DE).
    目的应用实时三维超声心动图(RT-3DE)定量评价犬多巴酚丁胺(Dob)负荷试验(DSE)中左心室容积的变化。
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    Objective To investigate The method and feasibility of analysing mitral annulus geometry via real-time three-dimensional echocardiography (RT-3DE).
    目的探讨实时三维超声心动图(RT-3DE)研究二尖瓣环立体形态的方法和可行性。
短句来源
    Validation of real-time three-dimensional echocardiography for quantifying left ventricular mass:experimental study
    实时三维超声心动图测量左室重量的实验研究
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    Experimental study of real-time three-dimensional myocardial contrast echocardiography in assessment of myocardial perfusion defect
    实时三维心肌超声造影评估心肌灌注缺损的实验研究
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  “实时三维”译为未确定词的双语例句
    pesudonormal/restrictive diastolic function group (15 cases,pesudonormal filling pattern, 110;restrictive filling pattern, E∶A>2, E/Ea>15). LA diameter, E/A, E/Ea, left ventricular ejection fraction (LVEF) were compared in the different groups. LA emptying fraction (LAEF) was measured with RT-3DE.
    在比较左心房内径(LA-D)、E/A、E/Ea、左心室射血分数(LVEF)等参数基础上,采用实时三维超声心动图(RT-3DE)检测左心房总体排空分数(LAEF),应用TDI检测左心房游离壁(LA)及房间隔(IAS)舒张晚期峰值速度(Va)及收缩期峰值应变(S),并对3组检测数据进行比较分析。
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    An experimental study of real-time three dimensional echocardiography for quantifying right ventricular volume
    应用实时三维超声心动图测量右室容积的实验研究
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    (3) Two observers agreed that RT-3DE provided morediagnostic information in 95.8%(23/24)of ASD,93.0%(40/43)of VSD,100%(20/20)of PDA,respectively,whereas 94.3%(82/87) overall.
    (3)两检查者一致认为实时三维超声心动图在各常见先天性心脏病诊断中均较二维超声心动图提供了更多的诊断信息,在全部先天性心脏病中为94.3%(82/87),在房间隔缺损、室间隔缺损、动脉导管未闭中分别为95.8%(23/24)、93.0%(40/43),95.0%(19/20)。
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    Data reconstruction was managed by real rime 3D and fly 3D (Volume rendering VR),some by multiple planar reformation (MPR), curved planar reformation(CPR) and visual endoscopy(VE) in working-station.
    数据重建为三维工作站用实时三维重建(Real time 3D,RT3D)及Fly3D(VR),有的亦用多平面重建法(MPR)、曲面重建法(CPR)及仿真内镜法(VE)。
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    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。
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  real-time three-dimensional
The availability of real-time three-dimensional echocardiography has brought this technique into clinical practice.
      
Real-Time Three-Dimensional Echocardiography for Improved Evaluation of Diastolic Function Using Volume-Time Curves
      
The capability to perform real-time three-dimensional (3-D) imaging has vastly strengthened the already established role of echocardiography.
      
The optimal plane for measurement of the right ventricular (RV) volumes by real-time three-dimensional echocardiography (RT3DE) was determined and the feasibility and accuracy of RT3DE in studying RV systolic function was assessed.
      
Real-time three-dimensional color doppler flow imaging: An improved technique for quantitative analysis of aortic regurgitation
      
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Purpose: To investigate the advantages and the applications of CT fluoroscopy. Materials and methods: 24 cases of percutaneous biopsies or percutaneous infusion therapies of thoracic, abdominal and bone diseases were perfrmed under the guidance of CT fluoroscopy. In these cases, there are 11 cases of thoracic, 9 cases of abdominal and 4 cases of bone disease. Results: All of 19 biopsies were successful. The positive rate were 100 % and accuracy were 95 %. Seven percutaneous infusion therapy and 1 vertebroplasty...

Purpose: To investigate the advantages and the applications of CT fluoroscopy. Materials and methods: 24 cases of percutaneous biopsies or percutaneous infusion therapies of thoracic, abdominal and bone diseases were perfrmed under the guidance of CT fluoroscopy. In these cases, there are 11 cases of thoracic, 9 cases of abdominal and 4 cases of bone disease. Results: All of 19 biopsies were successful. The positive rate were 100 % and accuracy were 95 %. Seven percutaneous infusion therapy and 1 vertebroplasty were successful under the guidance of CT fluoroscopy. Conclusion: CT fluoroscopy can exhibit the realtime 3D imaging and increase the accuracy and efficiency of the percutaneous interventional procedures obviously.

目的:探讨CT透视的优点及其在介入放射学中的应用。材料与方法:在CT透视引导下对24例胸、腹和骨骼病变做了经皮针穿活检或经皮针穿注药治疗。其中胸内病变11例,腹内病变9例,骨骼主要是脊椎病变4例。结果:经皮针穿活检19例次,阳性率100%,准确率为95%。经皮注药治疗7例次,椎体成形术1例,均在CT透视导引下取得良好效果。结论:CT透视提供了实时的三维定位图像,使非血管介入操作的准确性及效率明显提高。本文并对CT透视的其他优缺点进行了讨论。

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?

ve:On the basis of the stereoscopic localization device for early diagnosis of lung cancer, computer technique is used to creat a real - time synchronous 3D localization X - ray system. Methods: Two X - ray devices are adopted to simulate a double C - arm X - ray device to grab image from two different planes, then the computer image processing and computer vision technique are used to treat the images so as to obtain 3D information and reconstruct a 3D images for small lung lesion and fine needle. Results:...

ve:On the basis of the stereoscopic localization device for early diagnosis of lung cancer, computer technique is used to creat a real - time synchronous 3D localization X - ray system. Methods: Two X - ray devices are adopted to simulate a double C - arm X - ray device to grab image from two different planes, then the computer image processing and computer vision technique are used to treat the images so as to obtain 3D information and reconstruct a 3D images for small lung lesion and fine needle. Results: The two x - ray devices assisted by computer can simulate one double - tube X - ray device. It can grab images and reconstruct 3D image in real time and synchronously. The experimental results show that the two beams of x - ray don't interfere each other when imaging, the average localization error of system is 0. 5mm, and the maximum error is 1. 0mm, the display rate is about 4 frame/s. Conclusion:The experimental results show that it's practical both in theory and in practice to research a new type real - time synchronous 3Dlocatlion system assisted by computer. Both the configuration of hardware and the performance of software can satisfy the clinical practice.

目的:在“肺癌早期诊断立体定位仪”的基础上,利用计算机技术,研制一个新型的同步实时三维X线定位穿刺诊断系统。方法:该系统模拟利用两台X线机,从两个不同的角度同时获取图像,采用计算机图像处理和计算机视觉技术进行处理,以获得病灶和穿刺针的三维信息。结果:两台X线机可以较好地模拟一台双球管双C臂的X线机,完成两路图像的实时同步采集。实验表明两束X光在成像时相互之间没有干扰,系统的平均定位误差约为0.5mm,最大定位误差约为1.0mm,实时显示速度为4帧/秒。结论:实验结果表明,应用计算机技术研制一个新型同步实时三维立体定位系统,从理论和实践上是可行的。本系统无论是硬件配置,还是软件性能,都可以满足临床实用的需要。

 
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