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volume transducer
相关语句
  容积探头
     Methods:Voluson/Kretz and 3 D volume transducer with frequency 3 5/5 0MHz were used.
     方法:使用Voluson530D三维超声成像系统(三维容积探头,频率3.5/5.0MHz)的三维超声透明成像技术对部分实质性脏器内部组织结构及中期妊娠的胎儿进行三维重建。
短句来源
     The Clinical Study on Application Value of Three-dimensional Ultrasound Imaging of Static Structures with Free-hand and Volume Transducer
     自由臂静态三维超声和容积探头三维超声成像应用价值的临床研究
短句来源
     The volume data of the heart,face,head,thorax-abdomen were captured by the volume transducer.
     利用实时三维容积探头获取容积数据,观察胎儿的心脏、颜面部、头颅、胸腹部等解剖结构。
短句来源
  “volume transducer”译为未确定词的双语例句
     Methods 3D/4D STIC ultrasound system was used to examine 26 normal fetuses ranging between 16 and 41 weeks of gestation. The volume data acquisition was achieved by an automatic sweep volume transducer across the entire fetal heart and thorax. An offline analysis of volume data was carried out to examine the fetal cardiac anatomy with multiplanar mode and rendering.
     方法采用3D/4DSTIC超声系统对26例孕龄16~41周的正常胎儿进行心脏和胸部的自动扫查,获得容积数据后进行脱机分析,主要对胎儿心脏的解剖结构进行多平面的观察和三维重建,重点观察胎儿心脏的流出道等结构。
短句来源
  相似匹配句对
     The Volume P.T.
     T.
短句来源
     On the Volume of n-Ball
     关于n维球的体积
短句来源
     Medical transducer
     医用传感器(一)
短句来源
     Medical transducer
     医用传感器(三)
短句来源
     The volume data of the heart,face,head,thorax-abdomen were captured by the volume transducer.
     利用实时三维容积探头获取容积数据,观察胎儿的心脏、颜面部、头颅、胸腹部等解剖结构。
短句来源
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  volume transducer
The equipment used here was Voluson 530D 3DUS imaging system and 3D volume transducer with frequency being 3.0-5.0 MHz.
      
Because there is no perfect volume transducer applicable tointact human or animal studies, left ventricular volume must beestimated.
      


Twenty subjects participated in this study. Every subject comprised an incremental work test on Lanooy cycle ergometer, the work rate was increased in steps of 15W/min until the subject was unable to sustain the workrate. During the test the subject breath through a turbine volume transducer, the gas was measured by method of breath-by-breath. The electrical output of the expired airflow, and the O_2 and CO_2 signals were recorded directly on a 12-channel chart recorder, these signals underwent analog-to-digital...

Twenty subjects participated in this study. Every subject comprised an incremental work test on Lanooy cycle ergometer, the work rate was increased in steps of 15W/min until the subject was unable to sustain the workrate. During the test the subject breath through a turbine volume transducer, the gas was measured by method of breath-by-breath. The electrical output of the expired airflow, and the O_2 and CO_2 signals were recorded directly on a 12-channel chart recorder, these signals underwent analog-to-digital conversion and were transmitted to a digital minicomputer. The anaerobic threshold and gas exchange results were analyzed in 20 subjects in detail. Retest of anaerobic threshold and gas exchange were done in ten subjects after 2-3 weeks. There were no significant differences between test-retest of VO_2 max, VEmax, Rmax, maximal work rate, maximal heart rate and maximal oxygen pulse. The method, prevalance, application and limitation for determination of the anaerobic threshold were discussed.

本文采用气体交换法测定了20名健康人运动中的无氧阈结果。每名受试者在自行车测功器上完成递增运动试验,功率为每分钟增加15瓦,直至力竭完不成定量。受试者的呼出气测定结果除直接记录外,还通过模拟计算机输入计算机系列以备分析。对10名受试者在2~3周后作了重复测定,结果显示二次测定的各数值在统计上未见显著差别。最后,讨论了无氧阈测定的方法、范围、应用和它的限制。

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,并对相邻切面之间...

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 probe the methodology and clinical value of three dimensional sonographic transparent mode.Methods:Voluson/Kretz and 3 D volume transducer with frequency 3 5/5 0MHz were used.Results:3 D transparent imaging can demonstrate the inner structures of most solid or hollow organs despite their zigzag shapes.Conclusion:Various transparent imaging technics including minimal mode,maxmal mode,or X ray mode can greatly enrich the clinical applications.

目的:探讨三维超声透明成像技术的临床应用价值。方法:使用Voluson530D三维超声成像系统(三维容积探头,频率3.5/5.0MHz)的三维超声透明成像技术对部分实质性脏器内部组织结构及中期妊娠的胎儿进行三维重建。结果:三维超声透明成像技术可整体显示实质性脏器(肝、脾等)内部组织机构,显示的血管、胆管或胎儿的脊柱、肋骨等结构完整连续,不受其曲率变化的影响;并可显示实质性脏器内病变组织与周围组织结构的空间位置关系。结论:多种透明成像技术(最小回声模式、最大回声模式、X线模式等)的出现大大丰富了三维超声的临床应用范围,三维超声也必将在临床上发挥更大的作用

 
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