本文还讨论了多囊肾血流多普勒频谱变化的机制。
Mechanism of Doppler blood flow ultrasonic spectrum of the polycystic kidney was discussed.
目的探讨多普勒频谱在下肢动脉疾病检查中的价值。
Objective To evaluate the value of Doppler spectra in detecting arterial diseases in the lower limbs.
二尖瓣返流连续多普勒频谱为2束返流共同形成的叠加频谱；
The frequency spectrum of continuous wave Doppler composed of two merged regurgitant jets.
观察分析其二维声像图、彩色能量图及脉冲多普勒频谱特征。
The characteristics of the 2 dimensional echogram, the color Doppler energy imaging and pulsed 2 wave Doppler ultrasound spectrum were studied.
目的探讨二尖瓣口血流频谱和瓣环的组织多普勒频谱与左室平均舒张压的关系。
Objective To determine the relationship between left atrial diameter and mitral valve area or left atrial mean pressure in patients with rheumatic pure mitral stenosis.
目的：探讨慢性病毒性肝炎肝静脉管径及多普勒频谱改变与肝组织病理纤维化程度的关系。
Objective: to analyse the correlation of hepatic vein diameter and Doppler waveform changes with liver histologic fibrosis in chronic liver hepatitis patients.
肝门静脉血流速度变化及肝右静脉多普勒频谱图异常有助于脂肪肝的早期诊断及预后判断。
To investigate the diagnostic value of measuring blood velocity in right branch of portal vein and Dopplers onographic waveforms in right hepatic vein by CDFI on Fatty Liver Disease.
目的序贯观察上腔静脉综合征（SVCS）时上腔静脉多普勒频谱变化规律，预测疾病的演变过程。
Objective To consecutively investigate the changes of the superior vena cava flow Doppler patterns in patients with superior vena cava syndrome (SVCS) and predict SVCS development.
结果：前列腺癌周边血流丰富，彩色血流信号呈花环状或点棒状，多普勒频谱测值为高阻力指数特征。
Results:The blood flow was abundant around the cancer tissue. The color signal of blood flow showed garland-like or punctate. The feature of its Doppler spectrum was o…
利用现代谱估计的算法，在DSP芯片中对检测车辆雷达运动产生的多普勒频率进行频谱分析。
With modern spectral estimation algorithm, spectrum analysis on Doppler frequency caused by vehicles radar movement is carried out in DSP chip.
目的探讨彩色及频谱多普勒技术在诊断下肢动脉闭塞性疾病的价值。
Objective To explore the value of color Doppler ultrasonography in diagnosis of arterial occlusion disease in lower limbs .
结论：彩色多普勒血流频谱形态在小乳腺癌早期诊断中具有较高的应用价值。
Conclusion: The color Doppler flow spectrum have high applicated value in early diagnosis of small mammary cancer.
目的：研究高原地区正常人群TCD(经颅多普勒)异常频谱形态的特点。
Objective: to research the characteristics of TCD (Transcranial Doppler) abnormal spectrum contour of normal person group on plateau.
通过实验，作者发现了不同级别的气泡在多普勒回波频谱包络上有明显区别。
In the experiment, We have found that bubbles at various grades are distinctly different in the envelopes of Doppler echo spectrum.
目的设计一套数字化脉冲波超声多普勒系统，以实现多深度血流频谱分析和显示。
Objective To design a digital multigated PW ultrasound Doppler system and validate the system in experimental study.
二尖瓣关闭不全程度用频谱多普勒测定的有效返流口面积确定。
Mitral insufficient grades were determined by the effective regurgitant orifice area measured with spectral Doppler.
用彩色能量图显示低速血流，用脉冲多普勒寻找高舒张期低阻力滋养动脉血流频谱。
The blood flow frequency imaging of peritrophoblastic artery flowing was searching by pulse Doppler, it was high extending flow and low resistance.
目的探讨胎儿肝静脉的多普勒血流频谱及其临床意义。
Objective To study the Doppler flow spectrum of fetal hepatic vein.
目的：应用彩色多普勒技术检测糖尿病兔视网膜血流频谱，旨在探讨糖尿病视网膜病变早期血流变化的特点及其发生机制。
AIM: To detect the flow frequency spectrum of diabetic rabbits with color Doppler imaging (CDI), and evaluate the flow characteristic and occurrence mechanism of early diabetic retinopathy (DR).
结果病变血管在二维超声图像，彩色多普勒血流显像以及频谱多普勒方面差异均有显著性。
Results the differences of various diseased blood vessels are remarkable among the two-dimensional ultrasonic images, the color doppler? Ow images and frequency spectrum doppler.
在降雨条件下，多普勒效应后毫米波脉冲频谱发生展宽和压缩。
The spread and compress of millimeter wave pulse frequency spectrum will happen in Doppler Effect during rain.
频谱多普勒显示狭窄近段血流速度增高，远段流速减低。
Spectrum Doppler showed increased blood flow velocity in the proximal stenosis, and distal flow reduction.
目的：运用多普勒肺血流频谱，观察不同术式的肺切除后右心后负荷及泵功能的变化情况。
Objective: To study on the changes of right cardiac afterload and right ventricle pumping function according to different operation ways after pulmonary resection by Doppler pulmonary flow spectrum.
研制以超声波为载体的电路系统，探测眼部血流多普勒信号，并进行频谱分析。
A set of circuits for detecting ophthalmic blood flow Doppler signals was developed and spectral analysis was realized as well.
结果 ：在回顾分析有淋巴结微转移的19例患者的彩色多普勒成像中，15例得到丰富的形态学改变或血流显示，且有12例获得动脉血流频谱。
Results : There were 19 cases of lymph node micrometastases in 15 patients with the rich in color Doppler and morphological changes in blood flow , and 12 patients were arterial flow spectrum .
目的1对怀疑有脑血管疾病的患者进行经颅彩色多普勒超声（TCCS）检查，探讨颅内动脉狭窄的彩色多普勒及频谱多普勒特征。
Objective 1 To evaluate the character of color Doppler and frequency spectrum Doppler of cerebral artery stenosis by examining the patients who were suspected with cerebrovascular disease with TCCS.
近20年来，超声成像设备在电脑超声成像技术，谐波成像技术，相干处理成像技术，多普勒频移成像技术，回波频谱分析技术等方面取得了重大进展。
In the past 20 years, the imaging technique of ultrasound imaging equipment has made much progress in harmonic imaging, coherent imaging, Doppler imaging and frequency spectra analysis.
结论彩色多普勒血流频谱形态是鉴别甲状腺良恶性肿块的一项值得重视的指标。
Conclusions: The Doppler flow spectrum is an important index for differential diagnosis of thyroid lumps.
分析了存在距离-速度同步拖引干扰时的信号频谱特征，研究了一种脉冲多普勒（PD）雷达抗距离-速度同步拖引干扰的方法。
The spectrum characteristics of synchronous jamming on range and velocity are analyzed. A method for a PD radar to counter the jamming is also discussed.
目的：观察动脉硬化模型兔腹主动脉血流频谱，探讨超声多普勒检查诊断早期动脉硬化的局限性。
Objective: To assess the limitation of Doppler spectra in evaluating early arteriosclerosis by observing aortic flow spectra in rabbit models.
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