Doppler

Determines how much doppler effect will be applied to this audio source (if is set to 0, then no effect is applied).

All this comes out of Doppler shift measurements: the velocities, the radii, the periods and even the masses of these objects.

The preface of this paper is Doppler Biography, from his life experiences to the background of his creations.

Signals with sinusoid modulated phase is the general form of micro-Doppler signals in radar echoes from targets with micro-motions.

This exploits the Doppler effect familiar when a siren changes pitch as the fire engine on which it is mounted speeds past you.

Experimental results show that this method has advantages in achieving the Doppler shift of the satellite tracking.

In frequency modulation continuous wave (FMCW) radar, the target information is usually extracted by Range-Doppler processing.

The name "Dopplr" comes from Christian Doppler, a 19th Century scientist who came up with what's now known as the Doppler effect.

Doppler diversity considers Doppler spread as a way of diversity, and improves the system performance by enhancing the signal energy.

Tissue Doppler has been used for clinical applications since 1989.

The analysis and simulation shows that this radar system has higher range resolution and insensitivity to Doppler shift, etc.

Conclusion Color Doppler flow imaging examination is an effective preoperative diagnosis of ovarian cancer, one of the methods.

Besides, there was a obvious relationship between the items of flow field uniformity and the routine ones of Doppler echocardiography.

Afterwards a CT scan, colour doppler flow ultrasonography and a biopsy led to leiomyosarcoma of the lung being diagnosed.

The results show the modified algorithm is much better than the classical range| Doppler algorithm at the case of large squint angle.

The Doppler effect arises as the material swirls around the disk at thousands of kilometers per second.

Our objective was to use Doppler ultrasonography as a noninvasive procedure to provide renal hemodynamic information.

Result: The color Doppler signals and flow width were all increased in normal lower limb arteries after the contrast agent was admitted.

Tissue Doppler also showed longer systolic and diastolic intraventricular delays in the heart failure patients.

At least one receiving transducer is positioned to receive scattered energy to generate a range gated Doppler signal.

She may listen for your baby's heartbeat with a handheld ultrasound device called a Doppler, although it's still very early.

Even though I was warned it may be too early to hear anything, I was disappointed when the Doppler came up silent.

This is a new attempt to use laser Doppler velocimetry measurement technology in measuring the length of continuous tubes.

Color ultrasonic Doppler, CT and selective angiography are very important for the early diagnosis of the disease.

Objective It is of good guidance that color doppler echocardiography diagnoses coronary artery fistula right ventricle.

Compared to the position offset, influence of the length of sample volume on the Doppler bandwidth is minor.

Besides, the micro-Doppler signature of precession can be applied to the discrimination of the warhead and decoy.

The invention discloses a Doppler frequency searching method in a GNSS receiver and a correlator thereof.

Finally, the color harmonic Doppler method is brought up to enhance the effect of the Average Filtering method.

Conclusion Color Doppler can effectively help for the diagnosis of the ruptured aneurysm of aortic sinus, and for surgery type choice.

In general, Doppler parameters are the main reason that leads to degrading of the SAR (Synthetic Aperture Radar) imaging quality.

But you will not be able to measure the Doppler shift of the black hole-- no pulsations.

For each of these templates the data are corrected for the full Doppler effect of the corresponding orbit.

Any Doppler drift in the signal would fall within this wide band anyway and will form part of the total signal.

Objective To investigate the various color Doppler imaging of epidermoid cysts and its correlation with histopathologic changes.

The maximum Doppler frequency can be estimated more accurately over a wider range of Doppler spreads than prior art.

Objective: To determine the relationship between atherosclerosis (AS) and local hemodynamics by Doppler ultrasound technique.

Results Color Doppler ultrasound clearly displayed the modality, size, and flow of the kidney and pancreas grafts.

A first set of Doppler image data optimized for the visualization of vascular blood flow is created along one Doppler image processing path.

Objective To comparative study of color doppler energy(CDE) with color doppler flow imaging (CDFI) in diagnosis of small hepatic hemangioma.

To explore the pattern, lesion location and cause of abnormal blood flow of posterior circulation assessed by Doppler ultrasonography.

This type of radar does not display the exact position of an object, but determines its radial speed vector from the Doppler effect.

A maximum frequency or velocity curve, which equals to the envelope of a ultrasound Doppler spectrum, is significant in clinic.

Time-varying channel can provide time diversity, also known as the Doppler diversity.

Moreover, since the atoms are in random thermal motion the frequency spectrum will be altered by the Doppler effect.

Conclusion This study offers a theoretic basis to the early prediction of fetal hyperdynamic circulation with Doppler ultrasound.

However, the impact of windshear on the airport had been nicely picked up by the Terminal Doppler Weather Radar TDWR.

Objective: To probe into the clinical value of color doppler ultrasound in the early diagnosis of intrauterine growth retardation (IUGR) .

The effects of sample volume size and position on the Doppler spectral width and mean frequency are shown for a range of velocity profiles.

An incompressible turbulent boundary layer separation in a two-dimensional diffuser was surveyed using laser doppler velocimeter .

Furthermore, the shape and size of the iso-range annuli, iso-Doppler stripes and glistening zone have been discussed in details.

In recent years, many Doppler frequency estimation algorithms have been studied for the above wireless mobile applications.

Objective: To evaluate diagnostic value of two dimensional and color Doppler ultrasonography in peritoneal mesothelioma.

A close-form range curvature factor is constructed through the correspondence of the instant Doppler frequency to the squint angles.

Christian Doppler was a scientist and mathematician who explored and explained the phenomenon that has come to be called the Doppler Effect.

Cosmological redshifts, however, are generally considered to be different from the Doppler effect.

Methods: Doppler ultrasonic diagnostic apparatus was used to observe the form, echo, activity and blood flow.

Conclu-sion: Color Doppler ultrasound can diagnose muscular veniplex thrombosis of calf, and it would be spread as the routine examination.

B, Color Doppler scan of a Desmoid tumor in a previous scar revealing some vascularity in the lesion.

Methods: Color doppler echocardiography were carried out on 68 emergency cases with dyspnoea, chest pain, cardiac failure or stab wound.

Color Doppler ultrasound is the first choice for renal AVM screening but a definitive diagnosis still requires angiography.

We measure the velocity of blood flow of the brain on adopting transcranial Color Doppler(TCD), then process statistical analysis.

Objective To investigate the value of two-dimensional and color Doppler ultrasonography in diagnosing hepatic tuberculosis.

The maximum Doppler frequency shift is an important parameter which affects the performance of the OFDM system.

An estimation method of direction of arrival (DoA) and Doppler frequency for signals in the presence of array errors is proposed.

digital radio frequency memory(DRFM) is applied to airborne radio fuze jammer to jam pulse distance-detecting fuze and pulse Doppler fuze.

Conclusion Color Doppler ultrasound had a high sensitivity in position and qualitative analysis, with the high clinical value.

Objective To discuss the clinical significance of three-dimensional colour Doppler ultrasonography in Prenatal routine examination.

Ultrasonics. Hand-held probe doppler foetal heartbeat detectors. Performance requirements and methods of measurement and reporting.

The specific diagnosis can be made by utilizing ultrasound, magnetic resonance imaging (MRI), and Doppler studies.

Once, when my wife underwent a color Doppler ultrasound examination, we found that the doctor and us were from the same province.

Objective To detect the diagnostic value of two dimensional ultrasound and color Doppler flow imaging (CDFI )in thyroid disease.

Objective To probe into the clinical value of two-dimensional and color Doppler sonography in ectopic pregnancy.

Vascular Surgeons use Doppler probes when performing a bypass graft to verify flow in an anastomosis and to locate vessels in scar tissue.

Doppler frequency offset is always the passive factor that can't be neglected in satellite communication.

Finally, this paper verified the feasibility of applying the laser Doppler effect to the strip-line measurement of the speed by experiment.

A new algorithm for Doppler frequency compensation used in stepped-frequency signal processing is proposed.

Methods Color Doppler flow imaging was used to measure the degree of carotid atherosclerosis in 72 patients with TIA (TIA group).

MRI and doppler ultrasound technology currently allow the researchers insight into slowed perfusion and ischemic injury of the MS brain.

A study of fundus blood flow parameters with color doppler ultrasound in hypertensive patients.

The combination of some biochemical markers and uterine doppler opens a promising way for an early identification of the IUGR.

Comparative analysis of the color Doppler ultrasonography in patients with acute testicular pain with different causes.

Preoperative color Doppler study facilitates identification of skin perforators , thus simplifies the procedure.

Conclusions It is of high clinical value for high frequency color Doppler ultrasound in the diagnosis of testis and epididymal emergency.

Objective To evaluate the diagnostic value of two-dimensitional and colour Doppler echocardiography in coarctation of the aorta(CoA).

Conclusion Color Doppler echocardiography is the hyperthyroid heart disease diagnosis and follow the simple, noninvasive method.

But the clusters are also moving relative to the background radiation, so the scattered light gets distorted further by the Doppler effect.

Polar coordinate divergence method is one retrieving divergence from single Doppler radar velocity data in the polar coordinate.

Objective Discussion tyroma (armor lump) colored Doppler supersonic (CDFI) acoustic image characteristic.

Objective To discuss the color Doppler ultrasonic examination characteristics and the clinical value in fetal genitourinary malformations.

Objective To discuss the color Doppler ultrasonic examination characteristics and the clinical value in fetal genitourinary malformations.

There was significant difference (P05) in Doppler waveforms of hepatic vein between the control group and the patient group.

Conclusion Doppler echocardiography can diagnose congenital pulmonary vein stenosis noninvasively, directly and effectively.

Objective: The hemodynamic parameters and varicocele measurement of epididymitis were studied with color Doppler flow imaging(CDFI).

Objective: To discuss the clinical significance of observing the patients after liver transplantation with color Doppler ultrasound.

The simulation proved that the algorithm can accomplish the pulse Doppler identification under great acceleration.

A similar effect, called the Doppler shift, causes the siren of an approaching ambulance to apparently change pitch as it passes you.

Objective To investigate the diagnostic value of transvaginal color Doppler ultrasound in obstetrical and gynecological emergency.

using the doppler principle , low level winds are determined from the speed and direction of the movement of the eddies.

Conclusion Metastasis of advanced trophoblastic tumor in abdominopelvic cavity can be detected by color Doppler ultrasound.

Method 2-DE M-mode and pulsed Doppler were used to measure left ventricular geometric model mitral valve and pulmonary venous flow index.

Color Doppler ultrasound provides an important method for the monitoring of intrauterine hypoxia in fetus after oxygen treatment.

We investigated whether the frequency of Doppler-detected microembolism is related to the incidence of myonecrosis during elective PCI.

Conclusion Color Doppler sonography may play a significant role in the monitoring of the thrombosis in artificial blood vessels.

Conclusion: The two-dimensional ultrasound and color doppler sonography improves diagnosis breast tumor.

Objective: This study aimed at the color Doppler ultrasound assessment in mesenteric lymphadenitis in pediatrics.

Conclusion The Doppler ultrasonic of umbilical artery could provide reliable evidence for early clinical diagnosis of fetal distress.

Objective Using two-dimension ultrasound and color Doppler ultrasound to diagnosis single umbilical artery, and judge the clinical value.

Diagnostic methods included the color Doppler ultrasound, pregnancy test, magnetic resonance imaging (MRI).

During simulation process, mistakes could be possibly made cause of system frequency error and Doppler frequency shift.

Narrow spectral features of absorption or gain were observed in the center or sides of the Doppler-broadened absorption profile.

New images--including more than 100 full-color Doppler scans--give the book a fresh, state-of-the-art look.

Objective To investigate the worthiness of multicolor Doppler ultrasound in screening urethral system abnormality of fetus.

The results show that the formula for the transverse Doppler effect is incorrect in many texts and literatures.

The accuracy can be enhanced with optical heterodyne technique and the phase measurement of Doppler signals.

B, On color Doppler sonography, vascular hilum (open arrow) around lesion (solid arrow) is suspected but is not definite.

Stability of an Iterative Dual - Doppler Wind Synthesis in Cartesian Coordinates .

Objective To investigate the clinical value of the color Doppler ultrasound in screening fetal malformation of prenatal.

Terminal Doppler Weather Radar Observation of Atmospheric Flow over Complex Terrain during Tropical Cyclone Passages.

OBJECTIVE: To evaluate the effects of color Doppler ultrasonography on monitoring the complications of transplanted liver.

Echocardiography including tissue Doppler imaging (TDI) of the right ventricle was performed in all patients.

Three-dimensional power Doppler ultrasound improves the diagnostic accuracy for ovarian cancer prediction.

By maximum likelihood estimation, the likelihood probability of estimating Doppler frequency is maximized.

Conclusion Color Doppler ultrasound is valuable in the diagnosis of the small nodule thyroid tumors.

Conclusion Color Doppler ultrasound in the diagnosis of lower limbs deep venous thrombosis is accurately, non-invasive, high specificity.

And so you get all this useful information in astronomy by making the Doppler shift measurements of binary systems.

Conclusion Transabdominal colour doppler ultrasound is an important preliminary screening in the diagnosis of colonic tumor.

Objective: To investigate the enhancement of color Doppler signals in normal lower limb arteries by perfluorocarbon contrast agent.

Provides a concrete scheme applying IF sampling and quadrature transform to realize the quadrature sampling of pulsed Doppler radar signal.

Objective: To investigate transvaginal color Doppler sonography for the application value of septate uterus.

Objective To investigate the diagnostic value of color Doppler ultrasonography in congenital muscular torticollis (CMT).

Results: The color Doppler is much better than the dimensional ultrasound B in the centesis of kidney cysts.

Base on the heterodyne laser Doppler theory, a heterodyne laser Doppler vibrometer(LDV) with fiber structure was designed and implemented.

To evaluate the value of color Doppler ultrasound and interventional ultrasound in liver transplantation dynamic observation and treatment.

Objective To explore the clinical application of the color Doppler ultrasound in the diagnosis of ectopic pregnancy.

objective: to investigate the color doppler ultrasound technique in prenatal screening of fetal malformations in the diagnosis.

Conclusion: Combined examination of twodimension ultrasound and color Doppler can increase accuracy rate of diagnosis.

Ultrasonic Doppler in Medical Ultrasound imaging system enriches the application of Ultrasonic diagnosis.

Objective: To assess diagnostic application of color Doppler echocardiogram for acute pulmonary embolism.

The Range-doppler (R-D) algorithm, used extensively in SAR imaging processing in many situations, is a conventional one for SAR imaging.

The velocity products of Doppler radar can also be used as an important reference for forecasting extreme wind speeds in typhoons.

abstract: Objective To investigate the clinical value of Doppler ultrasonography and molybdenum target X-ray in breast health examination.

Objective To evaluate the value of color Doppler ultrasonography in monitoring normal transplant organs and associated complications.

Three-dimensional colour Doppler ultrasonography; Prenatal routine examination; Diangnosis basis.

The navigation and avionics are probably from domestic sources. The navigation system consists of radio altimeter, doppler radar and GPS.

Objective To observe the curative effects of percutaneous puncture in treating pelvic cyst with col- or Doppler ultrasound diagnosis.

All patients were diagnosed by color Doppler flow imaging (CDFI) for the position of emboli and the diameter of the vena cava.

By color Doppler ultrasonography , spiral artery can be showed conveniently, quickly, no-invasively and clearly.

Conclusion Color Doppler echocardiography(CDE)is of great value in the diagnosis of cor triatriatum.

A more precise estimation method of the Zero Doppler Time has been improved, and the frequency synchronization is achieved.

Finally, in accordance with the test data, we analysis the Doppler log's accuracy of velocity measurement under zero-crossing detector.

The Canada expert was presenting guidance for technical personnel to operate the Doppler satellite positioning system .

Objective To research distinguish of different model in acute renal allograft rejection with color Doppler sonography .

A global positioning system (GPS) Doppler frequency shift estimation method in earth centered earth fixed (ECEF) frame was proposed.

Objective: To investigate the value of Color Doppler ultrasonography in diagnosis of brachiocephalic trunk polyarteritis.

Objective To investigate the diagnostic value of transvaginal color Doppler ultrasonography(TVS)in ectopic pregnancy.

Objective: To evaluate the application of color Doppler ultrasonic diagnostic apparatus in the diagnosis of electric injury.

Methods: Totle 229 thyroid tubercle cases underwent color doppler supersonic examination proved by the surgery and pathology were reviewed.

Doppler centroid estimation is one of the most important steps in the DBS imaging of airborne pulse Doppler radars.

The Doppler frequency can be obtained as a heterodyne or beat effect.

Objective To evaluate the ability of data-based analysis by color Doppler in diagnosing acute rejection of kidney transplantation.

Objective To explore the value of Color Doppler Flow Imaging(CDFI) in differential diagnosis of complications after kidney transplantation.

Objective: To investigate the diagnosing and clinic value of Doppler sonography for puncturing pericardial effusion.

abstract: Objective To explore the application value of color Doppler ultrasound in diagnosing ectopic implantation.

Starting in the left cardiac ventricle the reader is taken on a guided tour on a fetal erythrocyte as measured by Doppler ultrasound.

The model gives Doppler spectra at different combinations of linear polarization of transmitting and receiving waves.

Methods fetal non-stress test combined with fetal umbilical artery doppler velocimetry were used in 200 late pregnant women.

The properties of Doppler centroid frequency and Doppler frequency rate of GEO SAR is discussed in detail.

The changes of pulse frequency spectrum in Doppler Effect are analyzed when millimeter wave pulse propagates through rain medium.

This technique can achieve Doppler -free precision in the measurement of the energy level splitting between two excited states.

The basic theory of signal processing in Pulse-Doppler radar was introduced systematically in chapter two.

Objective To evaluate characteristics of metastasis of advanced trophoblastic tumors in abdominopelvic cavity by color Doppler ultrasound.

The presence of the low level jet was also well captured by the Terminal Doppler Weather Radar TDWR at 6 deg scan.

Materials and Methods: 11cases complain of pain or tenderness of the posterior calf underwent color Doppler ultrasound examination.

Objective To evaluate the value of high-frequency color doppler ultrasonography technique in differential diagnosis of parotid gland.

Objective To investigate the diagnostic value of color Doppler ultrasonography applied in facial hemangiomas and vascularmalforamations.

The Rang-Doppler imaging forms imagery through one dimension Fourier-transformed twice in Cartesian coordinate.

Proximal to distal Doppler velocities of normal coeliac and superior mesenteric artery origins were comparable.

Objective: To observe the changes of doppler echocardiography in patients with different cardiac diseases.

The ratio of signal and noise is improved. The expression of the frequency and phase of Laser Doppler signal is put forward.

The Doppler probe quickly becomes an essential component on your OR procedure tray.

Conclusions Color Doppler possesses clinical value in distinguishing the two diseases.

Objective To evaluate the diagnostic value of color Doppler flow dynamic changes in patients with vertebral artery course variation.

Coronary artery blood flow and cardiac output were measured by Doppler flow meter. Blood oxygen content was determined by oximeter.

Objective To explore the value differential diagnosis of the breast tumor of benign and malignancy by color Doppler.

This paper presents a new method for rapid Doppler frequency shift estimation and frame synchronization in HF burst-communication.

The validities of formulas and the analysis of Doppler properties are demonstrated by the numeric simulations.

Objective: To explore display of B mode ultrasound and color Doppler of intrauterine residual after medicated abortion.

Wandering spleen and splenic torsion can be diagnosed by Doppler ultrasound and CT scan.

Conclusion High frequency color doppler ultrasound is valuable diagnosis method on mammary duct diseases.

Human Skin Microcirculation after Brachial Plexus Block Evaluated by Wavelet Transform of the Laser Doppler Flowmetry Signal.

Objective: To evaluate the clinical diagnosing value in the differentiation of prostatic carcinoma(PCA)by color Doppler.

Next year's model will have a Doppler sonar to help it avoid high-speed collisions with unsuspecting swimmers.

The proposed method may estimate Doppler rate robustly in the case of low SNR.

Objective: To evaluate the practical value of ultrasonic doppler flow imaging of umbilical artery on prenatal examination.

The principle of moving target detecting and coherent integrating with Doppler filters was analyzed secondly.

The polarization scattering Doppler spectral characteristics of chaff clouds in outer space are studied.

Explore the Doppler effect in a binary pulsar system by downloading the "Pulsating Science" 3D visualisation software.

Objective To estimate the differential diagnosis value of Color Doppler Ultrasound to obstructive jaundice.

This method can void the Doppler influence of spinning targets on range synthetic and improve the resolution effectively.

abstract: Objective: To assess the value of high frequency color doppler ultrasonography in the diagnosis of lump among operation incision.

To explore values of color Doppler ultrasound and misdiagnosis in differential diagnosis of thyroid adenoma.

Methods 28 cases with thyroid malignancy confirmed by pathological study received two-dimensional ultrasonic and Color Doppler examination.

measured with color Doppler ultrasound and the dosage of pituitary desensitization medication in controlled ovarian hyperstimulation cycle.

Objective To assess risks of esophageal variceal bleeding in patients with portal hypertension by using color Doppler sonography.

Wind farm turbines create a Doppler effect as they rotate, creating a potential radar blackout zone.

Objective To explore clinical applications of color doppler ultrasound diagnosis of breast cancer.

Objective In order increase the diagnostic standard of Doppler ultrasound to arterial occlusive disease in the lower limbs.

Doppler LIDAR is used to measure wind speed along the beam by measuring the frequency shift of the backscattered light.

For pregnant or lactating women, it was appropriate to use the color Doppler examination.

Objective To discuss the character of color Doppler flow imaging (CDFI) for diagnosis of Pelvic Congestion Syndrome.

Could GPS ever be used to measure effects besides the gravitational redshift and Doppler effect?

Methods 44 patients with ectopic pregnancy chose conservative treatment and monitored by transvaginal colour doppler sonography.

Fetal growth characteristics and fetal circulation variables were assessed with ultrasound and Doppler examinations in 1215 healthy women.

Objective To evaluate the value of transvaginal color Doppler ultrasonography in the diagnosis of pelvic congestion syndrome.

Methods: The factors of the guidance by color Doppler ultrasound for 97 cases of tissue biopsy, sclerotherapy and drainage were analyzed.

Colour Doppler flow imaging showed displacement of hilar vascularity within some cervical masses.

The savings from using VTI Doppler probes pleases hospital administrators and materials managers.

This algorithm has small computation amount load and has high estimation precision of doppler frequency rata-of-change.

Objective: Discusses colored Doppler supersonic to the liver portal vein lump diagnosis value.

Objective To explore the diagnostic value of color Doppler ultrasound in patients with torsion of testicular appendage.

Objective To investigate the diagnostic value of high-frequency color Doppler ultrasound in the treatment of hand soft tissue tumor.

Objective To analyse the characteristics of high frequency color Doppler ultrasound images of thyroid papillary microcarcinoma.

Objective: To discuss the application value of high frequency color Doppler ultrasound in the diagnosis of lymphangioma.

abstract: Objective To evaluate the value of color Doppler echocardiography(CDE) in the occlusion of rupture of aortic sinus aneurysm(RASA).

Objective: to explore the relation of Color Doppler Flow Imaging in bladder tumors and the tumor size and pathology classification.

Objective To explore the diagnostic valve of color Doppler ultrasonography in calf muscle venous diseases.

Doppler frequency expression is derived under consideration of the platform motion and the earth rotation.

But if the Doppler frequency offset exceed the capture range of PLL, the carrier synchronization will fail.

With the rapid economic development, doppler laser measuring instrument was applicated gradually at the rolling mill.

The reflected ultrasound signal by the RBC contains doppler frequency shift , which is proportional positive to the blood flow velocity.

Conclusions Color Doppler is an effective early detection method for VCI.

Ground instruments can detect Doppler shifting quite well and are needed to corroborate findings from space.

Conclusion: ALCAPA could be diagnosed accurately by doppler echocardiography.

Doppler effect reflects the time-varying characteristics of wireless channel.

Ultrasonic. Continuous-wave doppler systems. Test procedures.

Objective: To evaluate the role of color Doppler echocardiography in diagnosis of primary cardiac tumors.

Also can provide the beneficial enlightenment for Doppler measures frequent research.

Spectrum Doppler showed increased blood flow velocity in the proximal stenosis, and distal flow reduction.

Laser Doppler and optical Doppler tomography can monitor the cutaneous blood flow during and after treatment.

Objectives To assess the predictive value of intrauterine fetal hypoxia by doppler examination and non-stress test (NST).

Objective To evaluate the clinical value of color Doppler ultrasonic diagnosis on thyroid adenoma and nodular goiter.

Objective To investigate the diagnostic value of color Doppler flow imaging(CDFI)in acute orchitis and epididymitis .

This paper mainly studies the method restraining Doppler ambiguity induced by small antenna in the condition of error.

Objective: To investigate the diagnostic value of cryptorchidism by color Doppler ultrasound.

Objective To investigate the characteristics of Color Doppler Flow Imaging in left ventricular-right atrium communication (LVRAC).

Such wobbling betrays itself as tiny Doppler shifts in the spectral lines present in a star's light.

Objective To explore clinical value of percutaneous lung puncture biopsy guided by color Doppler ultrasound.

Objective To explore the clinical value of color Doppler ultrasonography (CDU) in the diagnosis of acute epididymitis.

Color Doppler flow imaging; Preoperative diagnosis; Ovarian cancer.