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- ultrasonic pulsed waves 超声脉冲波
- ultrasonic pulsed wave 超声脉冲波
- pulsed wave Doppler ultrasonic flowmeter 脉冲波多普勒超声流量计
- A hightech-gang in Germany is using and testing HPM-weapons that supply continous or pulsed waves over long periods of time. 他们有电磁管;微波发生器;放大器和系统集成.;两个或两个以上的脉冲波传送器,攻击目标区域,并加强其效果。
- To develop new technique in ultrasonic measurement, the experiment setup in this thesis is to use ultrasound pulser instrument for generating pulse waves to excite the transducer. 为了在超音波量测中发展一些新的技术,本论文中采用的实验设备是使用超音波产生机产生脉波讯号来驱动超音波探头。
- Objective: to determine clinical value of pulsed wave Doppler tissue imaging(PW-DTI)in evaluating aortic elasticity in coronary heart disease. 目的:探讨脉冲波多普勒组织成像(PW-DTI)在评价冠心病患者主动脉弹性时的应用价值。
- Methods:Combined with pulsed wave Doppler,blood flow characteristics of 36 hepatic hemangioma in 28 patients were studied by CDE and CDFI,respectively. 方法:用CDE与CDFI观察28例(36个)肝血管瘤内的血流情况,比较两者的血流显示率。
- Methods By using the technique of CDI ultrasound, 288 cases with orbital diseases were examined to show color Doppler flow imaging and pulsed wave Doppler (PWD) spectrum. 方法 应用CDI技术对 2 88例眼眶病患者眼眶病病变内部的彩色血流显像和脉冲多普勒频谱进行检测。
- Ultrasonic pulsed echo imaging system 超音波回音影像系统
- Methods 13 patients with renal artery stenosis were assess using color Doppler flow imaging(CDFI)and power Doppler imaging(PDI)and pulsed wave Doppler(PWD). 方法使用彩色多普勒血流显像(CDFI)、能量多普勒显像及脉冲多普勒频谱分析(PWD)对经血管造影证实的13例肾动脉狭窄病人进行研究。
- Objective Pulsed wave Doppler tissue imaging (PWDTI)was used to quantitively analyse left ventricular systolic function before and after revascularization. 目的采用脉冲多普勒组织成像技术(PWDTI)定量分析血管重建术前后左心室的收缩功能。
- Ying C F. Photoelastic Visualization and Theoretical Analyses of Scattering of Ultrasonic Pulses in Solids,Physical Acoustics. Vol. XIX. 应崇福;张守玉;沈建中.;超声在固体中的散射
- The testing results of ultrasonic pulse velocity (UPV) and temperature from disk-shaped specimens are generated and used as the training and testing data for SVM. 中文摘要混凝土为目前国内通用之建筑材料,近年来炉石常用来添入混凝土以考量环保、工作性、经济性与耐久性。
- In the process of ultrasonic testing of multi-layered interface, it is difficult to distinguish interface-echo from ultrasonic pulse echo because of peculiar structure. 摘要超声检测在多界面粘接检测应用中,由于多界面结构的特殊性,造成回波信号不易分辨。
- Objective: Tei index is usually measured with pulsed wave Doppler (PWD). Our aim was to assess the degree of agreement between PWD and a method based on tissue Doppler imaging (TDI) and its clinic application. 研究目的:本研究应用组织多普勒技术成像的频谱方式来评价左室Tei指数,通过与脉冲频谱多普勒的方法对比,来探讨应用组织多普勒技术来计算左室Tei指数的可行性问题及其临床应用。
- Objectives: To observe the changes on heart structure and function with echocardiogram and pulsed wave Doppler tissue imaging ( PW-DTI) in acute myocardial infarction (AMI) patients. 目的:应用心脏超声及脉冲组织多普勒成像(PW-DTI)技术定量观察急性心肌梗死患者梗死初期及随访期中心脏结构及功能的改变。
- In addition,the resistant index(RI)>0.7 and the bifurcated peak on pulsed wave Doppler(PWD)of blood flows inside or peripheral of the tumors implied much more positive malignancy prediction. 另外脉冲多普勒频谱阻力指数 RI>0 .;7及峰值的“开叉”现象也具有很好的阳性预告意义。
- This system adopts ultrasonic pulse echo to measure distance,uses temperature sensor DS1624 to obtain ambient temperature which is used to compensate the measurement errors by soft programming. 该系统采用超声波脉冲回波测量方法测量摊铺料厚度,利用温度传感器DS1624测量环境温度,通过软件对温度引起的测量误差进行补偿;
- Methods Coronary artery opening and interior diameter were measured. The coronary diameters were traced and the blood flow characteristics were observed using 2 D echocardiography, pulsed wave Dopper and color Dopper flow imaging. 方法 利用二维超声 ( 2DE)、脉冲多普勒 (PW )、彩色多普勒血流显像 (CDFI)检测受累冠状动脉开口、内径、追踪其走行及扩张处血流特点。
- Materials and Methods: The peak systolic velocity at mitral annulus (Sa) was measured by DTI pulsed wave mode using the apical window at 4 chamber, 2 chamber and long apical views. 材料和方法:对肥厚型心肌病及正常人分别测量二尖瓣环各点收缩期峰值速度。