血流信号

超声Doppler血流信号最大频率估计的数字方法及意义

Digital maximum frequency estimators for Doppler ultrasound flow signals and their application value

血流信号积分与ESR、CRP之间呈正相关（P0.05）。

There was a correlation ( P0.05 ) between the blood flow signals score and ESR , CRP .

超声Doppler血流信号平均频率估计和实验分析

Estimation of mean frequency of Doppler ultrasound signal and its experiment analysis

超声Doppler血流信号平均频率时域估计的计算机模拟

Computer simulation of mean frequency time-domain estimator for Doppler ultrasound flow signal

超声Doppler血流信号声谱包络周期的神经网络识别方法

A period recognition method for envelope of Doppler ultrasound sonogram with neural network

自适应谱线增强技术提取噪声中弱超声Doppler血流信号及其频谱

Detecting weak Doppler flow signal and its spectrum under noise with adaptive line enhancement

结论与螺旋CT相比，超声造影揭示治疗后的肿瘤内血流信号的敏感性、特异性和准确性均较高；

Conclusion Contrast enhanced harmonic imaging can depict tumor vascularity in treated HCC sensitively and accurately when compared with helical CT .

提出了基于MatchingPursuit分解的超声多普勒血流信号平均频移估计方法。

A Doppler blood flow analysis method based on matching pursuit is proposed for extracting intensity-weighted mean frequency ( IWMF ) waveform .

应用CDFI检查可见病变周围软组织内有较丰富的彩色血流信号。

CDFI showed rich blood supply signals from the surrounding soft tissue .

彩色多普勒（CD）显示收缩期过二尖瓣／三尖瓣五彩相间返流束血流信号。

Color Doppler ( CD ) showed colorful regurgitation blood signal in mitral valve and / or tricuspid valve during systols period .

CDFI没有显示过室间隔分流束血流信号。

No shunt signal through VS showed on CDFI .

大脑中动脉MRA血流信号异常与定量CT判断缺血改变的一致性：未来治疗学的研究目标

The probability of middle cerebral artery MRA flow signal abnormality with quantified CT ischaemic change : Targets for future therapeutic studies

CDFI示无血流信号或血流频谱变直。

They may behave as no blood flow signals and the frequency spectrum straightened .

结果白兔颈内动脉正常时，血流信号的最大Lyapunov指数均为负值，血液流动呈非混沌状态；

Results The largest Lyapunov exponents of the blood flow signal in the healthy white rabbits were negative and non-chaotic .

CDFI可显示该区域不同方向的多色相间的彩色血流信号。

In this areas , the CDFI showed colour blood stream signal in alternating with multicolored .

腺癌1例，B超和CT均示形态不规则，有点状钙化的低回声或低密度肿块，彩超无血流信号；

In the one case of parathyroid carcinoma , both parathyroid ultrasonography and CT showed irregular low-echo or hypodense mass with calcification in it , CDFI showed no blood flow signal .

彩色多普勒显示病变区血流信号丰富，动脉RI为低阻。

Color flow Doppler showed abundant blood flow signal in the lesions , the arterial RI was low .

Burg算法在基于AR模型多普勒血流信号时频分析中的应用

Application of Burg Algorithm in Time-frequency Analysis of Doppler Blood Flow Signal Based on AR Modeling

结果显示：恶性肿瘤血流信号检出率为92%，良性肿块是33%，恶性肿瘤血流信号检出率明显高于良性肿块（P＜0.05）。

The results show that detection rate of blood flow signal in malignant lesions is 92 % , significantly higher than that ( 33 % ) in benign masses ( P < 0 05 ) .

CDFI未发现滑膜表面及内部有彩色血流信号。

We do not find color flow signal on the surface and internal synovial with CDFI . 2 .

方法总结分析46例胸锁乳突肌（SCM）肿块的超声检查资料，分析其大小、内部回声及多普勒血流信号。

Methods The size , echo intensity on2-DUS and blood flow on CDFI in sternocleidomastoid mascle ( SCM ) masses in46 infants were examined , measured and analysed .

CDFI见腺体内满布斑片状彩色血流信号，密集如“火海状”。

There were lots of spots and slices style color bloodflow signals by CDFI like " flame " type .

方法应用CDFI检测38例脾静脉阻塞综合征，观察CDFI血流信号，并经X-线脾门静脉造影及手术病理所证实。

Methods Thirty-eight patients with splenic vein occlusion syndrome were examined with CDFI . CDFI hemodynamic signals were observed .

网脱带上大多数可探及血流信号，其流速低于CRA；

The flow velocity in RD belts was lower than CRA .

转移性大网膜增厚多呈不规则结节状，回声中等或较低，并伴有低回声结节，CDFI能显示结节内血流信号。

Metastatic tumors presented irregular thick great omentum with median or low hypoechoic nodules in which blood signals revealed on CDFI .

分别将两组治疗后肿瘤缩小率、消融率、瘤周血流信号、AFP值及治疗后6个月、12个生存率进行对比。

The datas of color - ultrasonography , AFP , 6 - months and 12 - months survival rate of two groups were compared .

计算机辅助测定超声造影前后血流信号像素网格数，并与微血管密度（MVD）对照分析。

The grid number of flow signal 's pixel was measured with the computer , and its result was compared with MVD .

所有病人二维超声心动图显示三尖瓣区无瓣叶活动，CDFI显示右房室连接处无血流信号。

Echocardiography in all patients showed tricuspid area without movement of the leaflets , no CDFI signal over the right atrioventricular junction .

改进Burg算法对血流信号的处理

Blood signal processing based on improved Burg algorithm

一种估计多普勒超声血流信号时频分布的方法是基于Levinson-Durbin算法的自回归（AR）模型法。

AR modeling based on Levinson-Durbin algorithm has been used to generate time-frequency representations of Doppler blood flow signals .