The true lumen, false lumen, "double-barrelled aorta", LV morphology and signal contrast were described.
对真腔、假腔、“双腔主动脉”、左室形态和信号对比进行了描述。
This "phase contrast" signal gives much clearer and detailed results.
这种“相差”信号提供更为清晰和详细的结果。
Firstly, this paper analyzes the current analog signal random testing technology, and describes using entropy measure is more accurate and scientific to estimate the randomicity of signal by contrast.
本文首先分析了当前模拟信号随机性测试技术，通过比较，说明使用熵测度对信号的随机性进行评价更加准确与科学。
The targets SNR(Signal Noise Ratio)and contrast are very low when the target is in the sea background in which there are sea waves and the reflexing light from the stretch welter.
海面背景下海面及连绵起伏的波浪反光使图像的信噪比和对比度都较低，而且舰船目标像素较少。
The next, the influence of phase match between input signal and line-array fiber-optic image bundles on the contrast transfer function was analysed digitally.
其次，采用数值计算的方式，分析了输入方波信号与光纤束位相匹配对对比度调制传递函数的影响。
Morphology, early phase enhancement rate, and signal intensity time course of the contrast enhancing areas in volunteers were investigated and compared with that of benign and malignant lesions.
分析实质增强灶数量、形态、早期增强率和时间信号强度曲线形态并与良恶性病变比较。
Scar tissue is slow to give up this contrast agent and its signal is therefore retained despite a washing out of contrast from the blood stream and normal tissues.
瘢痕组织排泄对比剂较慢，因此即使血流和正常组织对比剂的排泄后，瘢痕组织信号仍较高。
The signal to noise ratio (SNR) of tumors, contrast to noise ratio (CNR) and signal intensity ratio (SIR) of tumors and normal liver were calculated and analyzed.
计算不同图像中肿瘤信噪比（SNR）、肿瘤与肝脏对比噪声比（CNR）及信号强度比（SIR）等数据，并进行统计学分析。
Raw thermal images acquired by pulsed thermography(PT) usually have low signal noise ratio(SNR) and temperature contrast.
脉冲热像检测中直接获取的原始热像往往信噪比较低、对比度较差。
The technique of small dim target detection in low Signal-to-Noise and low contrast images has been the key technique of the electro-optical detecting system.
低对比度、低信噪比弱小目标探测技术是光电成像探测系统的关键技术之一。
The parameters for evaluation in dynamic contrast enhanced MRI included early enhancement rate, time signal intensity curve pattern and lesion's morphological features.
动态资料的评价参数包括：早期增强率、时间信号强度曲线类型以及病变的形态学特征。
The effects on the contrast of the LCLV projecting system, such as the LCLV driving signal voltage, frequency, duty cycle and the display screen illumination were analyzed.
分析了LCLV驱动信号的电压幅值、频率、占空比以及屏幕照度等诸多因素对投影系统对比度特性的影响。
Conclusions: the surfactant contrast agent is capable of obvious enhancement of flow Doppler signal by intravenous injections, it would be researched further.
结论：表面活性剂类声学造影剂经外周静脉注射后血流信号增强效果显著，值得进一步研究。
This paper presents a method of signal analysis and data processing using a single chip microcomputer in the contrast method of water meter calibration facility.
本文提出了在比较法水表校验装置上采用单片微机进行信号分析和数据处理的方法。
For the study, the choice of applicability feed-forward control of different load simulation signal and contrast of different forms of feed-forward control regulation of interference.
为研究前馈控制的适用性，选择不同的信号模拟负荷变化，对比前馈控制对不同干扰形式的调节效果。
The results demonstrate that the irradiance on object, backscattering and signal irradiance on photo-cathode are increased and the image contrast between object and background is decreased.
结果是目标上的照度、后向散射光和信号光在光电阴极面上的照度增加，目标与背景图像的对比度降低；
The technique has a large practical value for the detection of the signal with low contrast when SSPA device is applied.
该技术在用SSPA器件对低对比度信号的检测中有很大实用价值。
The contrast between wavelet transform maximal modulus and wavelet entropy shows that the latter is a better approach to detect transient signal accurately and timely.
利用小波变换模极大值和小波熵测度分别对其进行检测，对比表明，小波熵测度能更准确、实时地检测到各种暂态信号。
On MR images, the necrotic center of the nodes will show intermediate signal intensity on T1-weighted images, low signal intensity on T2-weighted images, and will enhance with contrast.
MR影像上，在T1序列上中央坏死显示中度强度的信号，T2序列上呈低信号，增强扫描有强化。
Conclusions Ultrasound contrast agent Levovist improves signal of blood flow obviously. It increases the diagnostic accuracy for intracranial aneurysms and the level of confidence.
结论使用超声造影剂可明显增强颅内血管信号强度，提高颅内动脉瘤的检出率。
As for the choice of the microwave irradiation frequency, the trade-off must be made in order to insure the penetration depth of the microwave signal, imaging contrast and signal-to-noise ratio.
为了同时兼顾穿透深度、成像对比度和信噪比三方面的需要，选择微波辐照频率时应该采取折中选取的原则。
In contrast, the centralized mode is good at reliability, signal transmission, and management, and should be preferred for the criterion of building-cell distributing circuitry.
网络可靠性和维护方便、管理有效是有线电视网络建设、运营的首选指标，因此，星型集中分配方式应该作为楼栋单元分配线路的规范。
In the aspect of testing, we use of wavelet algorithm and fractal algorithms to carry out the positioning signal power quality in this paper. And make the contrast analysis of the two.
本文分别使用小波检测算法和分形网格检测算法来进行信号扰动的定位，并对两者的检测效果进行对比分析。
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.
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。
The effects of optical filter bandwidth on the received signal quality are discussed by analyzing bit error rate (BER) and contrast ratio performances.
通过分析比特错误率和对比性能讨论了光学滤波带宽对接收信号质量的影响。
At eight to 10 weeks, 41 of 42 continued to heal and displayed decreasing signal intensity, as well as contrast enhancement.
在8到10周，42人中41人仍在治愈并随着造影强度表现为增长的信号强度。
The middle signal rings were enhanced on post-contrast images.
增强扫描等信号环强化。
The middle signal rings were enhanced on post-contrast images.
增强扫描等信号环强化。
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