相位对比法(PC)测门静脉血流速度、每分钟流量。
Portal velocity and portal flow with phase contrast (PC) were measured.
目的：评估磁共振电影相位对比法对液体流速的实验价值。
Purpose:To estimate the experimental value of PC cine MR for fluid flow.
相位对比成像是伦琴发现X线以来，人们对X线的成像特征、成像过程认识的拓展与深化。
Phase contrast technology is a development and deepening of peoples understanding of X-ray imaging characteristics and imaging process.
目的探讨相位对比法MR和形态体积分析法MR成像技术在评价心室功能中的临床应用价值。
Objective To investigate the clinical application value of phase contrast MR imaging and stereological cine MR imaging in the assessment of ventricular function.
目的：通过建立适当的流体模型，评价磁共振相位对比电影法对流体定量测量的可行性及准确性。
Objective: to evaluate the feasibility and accuracy of MR phase-contrast cine technique in cerebral blood flow quantification by establish appropriate flow phantoms.
目的：通过建立适当的流体模型，评价磁共振相位对比电影法对流体定量测量的可行性及准确性。
Purpose: to evaluate the feasibility and accuracy of MR phase-contrast cine technique in cerebrospinal fluid and cerebral blood flow quantification by establish appropriate flow phantoms.
目的：采用相位对比法磁共振成像(MRI)测量肺动脉血流量，探讨并评价两肺的血流灌注情况。
AIM: to measure the flow volume of pulmonary arteries by using phase contrast magnetic resonance imaging (MRI) and to investigate the values of phase contrast MRI in assessing pulmonary perfusion.
目的探讨相位对比法mri测量中心肺动脉各血管的血流速度和血流量的准确性以及临床应用价值。
Objective To assess the accuracy and application values of phase-contrast MRI by measuring the flow velocity and volumes of the central pulmonary arteries.
目的探讨相位对比法MR I (PC -MR I)测量肺动脉血流的准确性以及临床应用价值。
Objective To investigate the accuracy and applied value of measurement of pulmonary flow velocity with phase-contrast MRI (PC-MRI).
结论流动液体模型证明磁共振相位对比技术是一种客观、准确的流体定量测量技术，可用于临床血流定量研究。
Conclusion Phase-contrast MR imaging is proved to be an accurate and practical flow measurement technique in flow phantom study and can be used in quantitative study of blood flow clinically.
方法：用磁共振相位对比电影法测定模拟脑血液流动的管状模型稳态流动下流体信号强度，并与相应的速率进行相关性分析后分别得出相应的转换函数关系。
Methods: tube flow phantoms which simulating the cerebral blood flow were established. Flow signal intensity of the steady flow in tubes was measured by MR phase-contrast cine technique.
通过合成地震记录与井旁地震道的对比，从地震道中提取了非零相位的实际地震子波，并据此对原地震数据体进行子波反褶积处理。
The actual non zero phase wavelet was extracted from seismic traces by comparing synthetic seismogram with near wellbore seismic traces and was used to be deconvolved with seismic data.
论文中讨论了相位激光测距和脉冲激光测距的基本原理，并就两种方法的优缺点做了对比分析。
In this paper, the principles of laser range based on phase and pulse were discussed in this paper, and the advantages and disadvantages were compared and analyzed.
与传统行人相位设计方法的对比分析表明这种行人相位设计方法缩短了行人过街最短绿灯时间，降低了过街人均延误。
The comparison of the method and the traditional design method of pedestrian phases demonstrates the new method can shorten the minimum green time, and reduce pedestrian delay.
结果表明：啁啾光脉冲的振幅调制深度和相位扰动深度越大，则压缩后的光脉冲对比度越小；啁啾光脉冲的振幅调制周期和相位扰动周期越小，则压缩光脉冲的预脉冲宽度越大。
The simulations show that more amplitude modulations and phase perturbations lead to lower contrast of the compressed pulse, and bigger modulation cycle results in wider pre-pulse width.
这个方法利用了周期性信号间相位差变化的规律性对比对信号进行相位处理，有效地减小了量化误差。
Utilizing the regularity of phase difference between period signals, phase processing is made on comparison signals, which reduce effectively quantified error.
摘要：论文中讨论了相位激光测距和脉冲激光测距的基本原理，并就两种方法的优缺点做了对比分析。
Abstract: in this paper, the principles of laser range based on phase and pulse were discussed in this paper, and the advantages and disadvantages were compared and analyzed.
讨论了太赫兹脉冲在样品边缘处经历的相位阶跃与边缘对比度的关系。
The influence of the phase step of the broadband terahertz pulses on the edge contrast is discussed.
相位一致性模型避免预先假设边缘的类型，且不受明暗对比度的影响。
Phase Congruency Model avoids the hypothesis of the edge type in advance, and is invariant by contrast.
结果表明：啁啾光脉冲的振幅调制深度和相位扰动深度越大，则压缩后的光脉冲对比度越小；
The influences of the SPM with amplitude modulations and phase perturbations on the compressed pulse is simulated.
通过实验对比发现，利用再现光场相位突变确定再现像聚焦位置的方法效果比较理想。
Through experiment comparison, the method for determining the position of the reconstructed image by using the phase change of the reconstructed optical field is ideal.
文中给出的对比例题表明，对大跨度结构考虑地震输入相位差的影响是十分必要的。
The examples given in this paper show that it is very necessary to take the ground motion phase lags into account for long span...
文中给出的对比例题表明，对大跨度结构考虑地震输入相位差的影响是十分必要的。
The examples given in this paper show that it is very necessary to take the ground motion phase lags into account for long span...
应用推荐