How To Use Doppler In A Sentence
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B , Power Doppler image showing circumferential blood flow around the tumor.
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Therefore, a color flow Doppler ultrasound showing a systemic arterial blood supply to the mass confirms the diagnosis of bronchopulmonary sequestration.
Bronchopulmonary sequestration and Congenital Cystic Adenomatoid
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Cyclone detection doppler radars are replacing the conventional analogue radars in important locations along the east coast.
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The Doppler frequency can be obtained as a heterodyne or beat effect.
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In primary hypertension, echo-Doppler velocimetric indices did not change during follow-up.
The Journal of Clinical Endocrinology & Metabolism Current Issue
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For instance, doctors may need to use a handheld imaging device known as a Doppler rather than a stethoscope to measure heart rate in obese patients, and they may need to use a longer speculum for gynecological exams.
Have Americans Literally Outgrown Heath Care?
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Kelley Stewart, a doctoral student in mechanical engineering, and Charonko are working on a project in collaboration with cardiologists William Little and Rahul Kumar from the Wake Forest University School of Medicine to improve Doppler echocardiograph and MRI diagnostics for this disease.
Medlogs - Recent stories
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So a lot of times we have what we refer to as Doppler indicated tornadoes, as opposed to, say, trained storm spotter indicated.
CNN Transcript Sep 23, 2006
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The Doppler effect is a change in the frequency of sound waves caused by moving objects.
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Objective To explore the clinical value of color Doppler sonographic in diagnosis of hereditary hemorrhagic telangiectasia(HHT)with hepatic involvement.
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However, this system may be most appropriate for vascular specialists and surgeons due to its complexity and requirement for objective testing using Doppler studies, duplex scanning, plethysmography, and phlebography.
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Objective : To study the value of diagnosis of coarctation of the aorta color Doppler echocardiography.
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By analyzing the relationship between basis expansion model (BEM) and Doppler spectrum, the authors propose a scheme based on fractional BEM for the estimation of doubly selective channel parameters.
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Electrocardiography, stress electrocardiography, echocardiography and cardiac scan with dipyridamole test, as well as carotid Doppler ultrasonography, showed no abnormalities.
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This Doppler effect is frequently heard on the ground when a fast-moving ambulance or police car passes the listener.
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If you squinted hard enough, they became streaks of red and green fire, a condition known as the preadolescent Doppler effect.
The Metrognome and Other Stories
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In countries outside the United States, Doppler flow velocimetry is used to monitor uteroplacental blood flow.
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Purpose : To evaluate transvaginal color Doppler sonography ( TVCDS ) in the diagnosis of adenomyosis.
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An important question in the interpretation of the laser Doppler readings is the depth of the measurement region.
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I therefore predict that a continuous 7 year long observation of pronounced lines may reveal a small doppler shift variation, close to the periastron passage.
Do Eruptions of P Cygni Point to a Companion? | Universe Today
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Doppler frequency drift and timing error were considered in state transform equations.
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Now, physicists in England have demonstrated a topsy-turvy Doppler shift in which a radio wave's frequency rises as the source recedes.
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For these reasons, close surveillance of gastroschisis in the third trimester using a combination of sonography and fetal surveillance testing (biophysical profile, Doppler ultrasound, amniotic fluid volume) is important to monitoring fetal well-being and determining the appropriate time of delivery.
Gastroschisis
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Along with the progressive development of tissue Doppler imaging, it is expected to become the most important criterion to the selection of patients for cardiac resynchronization theraphy.
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An important question in the interpretation of the laser Doppler readings is the depth of the measurement region.
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Missiles are guided using a combination of inertial navigation and terrain contour matching enhanced with highly accurate speed updates provided by a laser Doppler velocimeter.
The Air Force Cover-Up of that Minot-Barksdale Nuclear Missile Flight
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So studying on a kind of waveforms adapting to airborne pulse Doppler radar altimeter and corresponding signal processing algorithms is major task in this dissertation.
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The sound reached a crescendo, then trailed off to the south in a quickly fading Doppler echo.
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Horseshoe bats have a special kind of echolocation (termed ‘high duty cycle’), which allows them to use the Doppler shift to detect the flutter of moth wings.
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Active radar seeker mostly adopts pulse Doppler monopulse radar system. So it is significant to research on the modeling and simulation of this kind of radar seeker.
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The instructor had been navigating over the mountains with Doppler and had the coordinates of the airport plugged into the system.
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The system they focused on, three huge Jupiter-like planets orbiting the central star Upsilon Andromedae, was the first extrasolar multi-planet system ever discovered by Doppler spectroscopy.
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Conclusions The color doppler sonography had great diagnostic value in neck tumors.
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Doppler's principle, by which light alters in refrangibility through the end-on motion of its source, was first made effective for astronomical reseach by 1868.
The Catholic Encyclopedia, Volume 2: Assizes-Browne
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The diagnosis can be confirmed by investigations such as MRI scans, Doppler ultrasonography, and venography.
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We are going to flip over to what we call our Doppler colors.
CNN Transcript Mar 15, 2008
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This paper introduces the principle and implementation of fetal monitor based on DSP and ultrasonic Doppler theory.
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A reduced Doppler shift also enhances the effectiveness of chaff and decoys, which should allow the aircraft to break lock and hide in ground clutter.
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The Doppler supersound can determine precisely the valve damage caused by IE, and reflect the physiopathological changes objectively.
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Then there is another pause before it all starts up again, fire dopplering from one side of town to the other, now a rapid series of what sound like the distinctive bark of an AK47.
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By analyzing the relationship between basis expansion model (BEM) and Doppler spectrum, the authors propose a scheme based on fractional BEM for the estimation of doubly selective channel parameters.
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Using color and power Doppler on ultrasound, complete occlusion of blood flow to the acardiac/acephalic twin was confirmed.
Twin Reversed Arterial Perfusion Sequence and Bipolar Cord
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Objective To assess the associations between Doppler ultrasound derived luteal blood flow indices and luteal hormonal profile in midluteal phase in spontaneous and stimulated cycles.
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Purpose : To evaluate transvaginal color Doppler sonography ( TVCDS ) in the diagnosis of adenomyosis.
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The three colour laser Doppler Anemometer measures in three dimensions how fast a fluid is travelling past a given point.
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A pulse-Doppler radar operator detects an aircraft by noting a difference in the frequency of the transmitted and reflected energy.
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In the mean-velocity Doppler model, the blueshift acceleration experienced by the travelling photon is essentially the same contractive gravitational acceleration experienced by the galaxies in the Hubble Flow, so the photon does not experience any gravitational time dilation which differs from the underlying time dilation inherent in the FLRW metric.
Does Space Expand?
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Simulation result shows that the system a good performance in multi - path fading and Doppler shift channel.
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In heterodyne SLDV, a scanned laser beam incident on the vibrating test surface undergoes a Doppler radial frequency shift proportional to the instantaneous velocity.
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Venous leg ulcers were diagnosed according to clinical criteria and confirmed with duplex Doppler ultrasonography, ascending phlebography, and foot volumetry when the ulcers had healed.
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Conclusion Color Doppler echocardiography can help to diagnose the LVRAC.
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Because those organs are moving, the frequency of the reflected radiation is Doppler shifted by a tiny amount.
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Several important parts are analysed and discussed, which include echo signal, azimuth processing, range processing multi-looks processing and Doppler parameters estimation for spaceborne SAR.
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In the type of ultrasound examination called Doppler velocimetry, a hand-held transducer uses sound waves to measure patterns of fetal blood flow.
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Synth notes bob, bend and warble, producing a strange, droning, Doppler effect, whizzing past the listener like vehicles on a Tron superhighway.
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Sometimes ultrasound tests called biophysical profiles are used as well, and Doppler waveform measurement by ultrasound on the placenta/umbilical cord.
Discussion Forum - TuDiabetes
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I am looking for any information on the Doppler radars and the effects of microwave radiation.
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The structure and the experimental results of a remote controlled pulsed laser Doppler velocimeter is described.
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The pulse Doppler(PD)radar technique in ground-based radar is mainly applied to detecting motive targets in strong clutter jamming circumstance.
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With a larger beam expanding telescope and an additional etalon inside the cavity, the spectral width of the pulsed dye laser could be reduced to an unprecedented 0.0004 nm, and an additional external filter etalon soon permitted the first experiments on Doppler-free saturation spectroscopy of atomic resonance lines.
Theodor W. Hänsch - Autobiography
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Laser Doppler velocimetry has been successfully applied to the measurement of speeds of everything from blood corpuscles to rolled steel.
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Because those organs are moving, the frequency of the reflected radiation is Doppler shifted by a tiny amount.
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Many of my other highly cited papers from the Stanford years describe relatively simple experiments such as ultrasensitive fluorescence spectroscopy with the power to detect the light from single atoms, sensitive intracavity absorption spectroscopy with a multimode dye laser, the first demonstration of continuous wave Doppler-fee two-photon spectroscopy, and the experiments with my student Carl
Theodor W. Hänsch - Autobiography
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After contact they zoom away, Doppler-shifting into the horizon, which is littered with failed attempts.
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Recent developments from the MEMUNITY community include a membrane-test system that applies an electrostatic stimulus to the device under test and measures the resulting motion with a laser-Doppler vibrometer, and cryogenic and vacuum test systems, such as the high-vacuum wafer-level test system at IMEC used for reliability testing of RF-MEMS devices.
Undefined
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The dipoles observed in the cosmic temperature are due to the Doppler Effect caused by the movements of our galaxy.
Unthreaded #19 « Climate Audit
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We look at Doppler radar. and the reason why we use the word Doppler is because of the train.
CNN Transcript Oct 18, 2007
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The tracing shown below demonstrates the pulsatile velocities of red blood cells over time as shown using Doppler ultrasound technology.
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In collaboration with Professor Cutler J. Cleveland (Boston University) and Jeff Frank (Indigo Systems Corporation), and Gary McCracken (University of Tennessee), we are using infrared thermal imaging to census bats as they emerge nightly from caves, NEXRAD II Doppler radar to assess landscape patterns of nightly dispersal, and economic modeling to assess the impact that this insectivorous species has on a major agroecosystem in Texas.
Contributor: Thomas Kunz
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Doppler echocardiogaphyhas emerged as the principal clinical tool for the assessment of left ventricular diastolic function.
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Brain scans using Doppler sonography, conducted in 1999 in Germany at the University of Munster and the University of Dortmund, found that when non-musicians listened to music, the blood flow to the right hemisphere increased.
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Imaging advantage, practical value and limitation of transesophageal Doppler echocardiography were discussed.
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These include fetal movement assessment, nonstress test, contraction stress test, fetal biophysical profile, modified biophysical profile and umbilical artery Doppler velocimetry.
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The Doppler shift periodicity is short and stronger.
If the Earth is Rare, We May Not Hear from ET | Universe Today
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After acquiring Doppler sounds at the palmar arch, the RNFA occludes the radial artery flow.
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Doppler echocardiogaphyhas emerged as the principal clinical tool for the assessment of left ventricular diastolic function.
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The blood velocity at some acupoints on the human body surface was measured by laser-Doppler technique and herbs such as Panax ginseng were used to disturb the pressure pulse.
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To confirm the planetary nature of GJ1214b and to obtain its mass using the so-called Doppler method, the astronomers needed the full precision of the HARPS spectrograph, attached to ESO's 3.6-metre telescope at La Silla.
Astronomers Find Super-Earth With An Atmosphere | Universe Today
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In colour flow sonography, pulsed Doppler signals are used to produce the images.
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Conclusion: Color Doppler ultrasound examination might a useful noninvasive method for IMA - coronary artery bypass graft surgery.
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The flowing counter pulsating and volume of blood stream were showed clearly in colour doppler.
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The level of ultrasound power emitted is not adjustable on a fetal doppler unlike that of a sonograph.
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Method: Copper needle was placed into the tumor tissue under the guide of colored Doppler ultrasonic angiograph with a probe of 70MHZ.
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•A Doppler is a hand-held ultrasound device that transmits fetal heartbeats to a speaker.
The Official Lamaze® Guide
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In 1842 Doppler proved that the colour of a luminous body, like the pitch or note of a sounding body, must be changed by velocity of approach or recession.
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Using color and power Doppler on ultrasound, complete occlusion of blood flow to the acardiac/acephalic twin was confirmed.
Twin Reversed Arterial Perfusion Sequence and Bipolar Cord
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The program takes into consideration various relativistic effects, such as Lorentz contraction, red/blue Doppler shift, headlight effect and optical aberration.
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Objective: The aim of the study was to examine the outcome of renal function and intrarenal Doppler velocimetric indices in primary aldosteronism.
The Journal of Clinical Endocrinology & Metabolism Current Issue
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A colour Doppler ultrasound scan done two weeks later confirmed the lesion to be of vascular origin with multiple draining channels and arterialisation of veins.
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Many of my other highly cited papers from the Stanford years describe relatively simple experiments such as ultrasensitive fluorescence spectroscopy with the power to detect the light from single atoms, sensitive intracavity absorption spectroscopy with a multimode dye laser, the first demonstration of continuous wave Doppler-fee two-photon spectroscopy, and the experiments with my student Carl
Theodor W. Hänsch - Autobiography
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The readings of stethoscope doppler reflect blood flow within artery of transplant precisely.
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Jeff squints, takes a deep breath, and stares deeply into the late afternoon sky, turning his head - perhaps mentally overlaying computer-generated graphics onto the swirling clouds, time-lapse isobar gradients and Doppler bands to help form his decision.
The Aristocrats
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Objective: To determine the feasibility of measurement coronary flow reserve ( CFR ) by transthoracic Doppler echocardiography ( TTE ).
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By analogy, the electromagnetic radiation emitted by a moving object also exhibits the Doppler effect.
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The relativistic Doppler effect for light waves is formulated exactly by 4 - vector transformation.
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The result of calculation shows that the Doppler sideband near-resonance method is preferable.
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One Doppler radar can only measure speed of rain and cloud, but we need three-dimensional wind-vector fields from the echo of wind in application.
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Among the equipment in the lab is a laser Doppler vibrometer, which measures the speed and displacement of a vibrating structure; various strain gauges that assess the stress, strain and loading on a structure; and an impulse hammer that measures how much force is applied in tests under controlled conditions.
PhysOrg.com - latest science and technology news stories
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The patient was diagnosed aortic stenosis by color Doppler ultrasound.
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The instrument can demonstrate ultrasonic Doppler effect, analyze the frequency deviation and measure the velocity.
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Codes used in phase coded pulse compression waveforms suffer from Doppler mismatch.
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First, because the source and observer are moving away from each other the doppler effect causes an increase in wavelength.
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Synth notes bob, bend and warble, producing a strange, droning, Doppler effect, whizzing past the listener like vehicles on a Tron superhighway.
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Indian Meteorological Department (IMD) proposes to provide nowcasting services, a system that can predict climate conditions for a very short period - one to four hours - using data from Doppler
WN.com - Articles related to Less meat consumption is not less global warming
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Just as we can't tell if we'll hit a microburst and plunge down 300 feet unless we have Doppler radar, we also don't know what the EM environment is unless we measure it.
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A smaller, portable machine called a Doppler uses ultrasound for intermittent monitoring.
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By the end you’ll be guessing how far away the clumsy attendee is by the Doppler effect caused by the uproar.
The New York Cork Report
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Based on the definition of the average ambiguity function, the numerical expression of the average ambiguity function for the RPPM pulse doppler radar signal is derived in this dissertation.
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The results show that the Doppler background due to the near resonance of the intermediate level is eliminated and the signal of two-photon transition can be distinguished from saturation absorption.
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The instrument can demonstrate ultrasonic Doppler effect, analyze the frequency deviation and measure the velocity.
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Simulation results show that the design is efficient with the soft-failure of gyro, accelerator, GPS receiver and Doppler radar.
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I will do my best to quote, but the essence of his message was not an echo from the day's rally, but the Doppler Effect that preceded 90% of the people in the room and the Stewart/Colbert Rally.
Joe The Nerd Ferraro: Dick Gregory and the Rally for Sanity
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Cerebral hemodynamics in preterm infants during positional intervention measured with diffuse correlation spectroscopy and transcranial Doppler ultrasound.
Recent Neonatal Research Publications
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Objective: To explore the diagnostic values of transcranial doppler (TCD) and brain-stem auditory evoked potentials ( BAEP) in vertebrobasilar ischemia (VBI) .
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The three colour laser Doppler Anemometer measures in three dimensions how fast a fluid is travelling past a given point.
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Indices of diastolic dysfunction can be obtained non-invasively with Doppler echocardiography or invasively with cardiac catheterisation and measurement of left ventricular pressure changes.
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The reversed arterial flow in the acardiac/acephalic twin should be documented using color flow Doppler.
Twin Reversed Arterial Perfusion Sequence and Bipolar Cord
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A Doppler compensation method for bi-phase-coded signal based on Moving Target Detection (MTD) is presented to resolve the Doppler sensitive trait.
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Conclusion This study offers a theoretic basis to the early prediction of fetal hyperdynamic circulation with Doppler ultrasound.
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Firstly, the light waves from the star are either compressed or stretched as it approaches or recedes from us on Earth this is called the Doppler Effect.
George’s Cosmic Treasure Hunt
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All three experiments used metastably excited helium atoms He (1s2s3S) for which the Doppler limit is 23 µK while the recoil limit is 4 µK.
Additional background material on the Nobel Prize in Physics 1997
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A relative contraindication is the presence of carotid bruits, which should be evaluated by Doppler ultrasonography before proceeding with massage.
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This causes the heterodyne beat intensity to oscillate at the corresponding Dopplershifted frequency.
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The reversed arterial flow in the acardiac/acephalic twin should be documented using color flow Doppler.
Twin Reversed Arterial Perfusion Sequence and Bipolar Cord
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The SCORE study's purpose is to find new imaging methods, such as advanced magnetic resonance imaging techniques and transcranial color Doppler sonography, that can detect strokes earlier than current methods.
Sickle cell disease research at The Children's Hospital
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Filling fraction method by Doppler echocardiography can be used toe-valuate LV diastolic function in cases with diabetes mellitus and to screen diabetes cardiomyopathy.
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Objective To assess collateral compensative capacity by transcranial Doppler(TCD) in patients with internal carotid artery occlusion .
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Doppler radars will help in getting clear information three to four days ahead of the Cyclone if the cyclone is in the radius of 400 km of the doppler radar. posted by 24/7 News Network @ 9: 51 AM
Orissa launches India's first Geo-Spatial Data System
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The inverse Doppler effect is not something you can hear, but understanding it could one day lead to important advances in optics and communications equipment.
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When we perform a series of transformations into orthonormal frames at a series of points along the path, and the redshift is still exactly the same, and we go “ooooh look, now we have a series of Doppler shifts along the path”.
Does Space Expand?
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They placed the feathers in a wind tunnel and used a Doppler vibrometer to measure the vibrations.
NYT > Home Page
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Because those organs are moving, the frequency of the reflected radiation is Doppler shifted by a tiny amount.
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The primary experiments on the retrieval of the wind vector fields from the Doppler radial velocity to modify the initial forecast fields are carried out, and some conclusions are obtained.
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Objective : To investigate the diagnosing and clinic value of Doppler sonography for puncturing pericardial effusion.
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Recent studies using Doppler sonography and near infrared spectroscopy have shown increased perfusion of the middle cerebral artery in patients with chronic cerebrovascular disease given a single infusion of vinpocetine.
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Wilhelm et al. compared visual scoring, colorimetry and high-resolution laser Doppler imaging and found that there was no increase in sensitivity using these objective methods compared with visual scoring.
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A venous Doppler study confirmed venous thrombosis of the deep femoral vein.
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In use 14 days, 28 days, using laser Doppler blood flow measurement instrument detection of ischemic hind limb perfusion.
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The second round of flight tests, completed in August, was to evaluate the capabilities of an emerging lidar technology developed at Langley, called the Doppler lidar velocimeter, also needed to meet ALHAT's stringent need for precision navigation.
SpaceRef Top Stories
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If the light had been stretched, or 'redshifted', through the Doppler effect - the same distorting effect that causes an ambulance siren to rise in pitch when approaching or drop as it recedes - it could only mean one thing: everything in the universe was hurtling away from our humble Milky Way, and the further away it was, the faster it fled.
COSMOS magazine - The science of everything
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Design: In 122 consecutive patients with chronic HCV infection, the HVF pattern and presence of FHA within the liver hilus were assessed by Duplex-Doppler and B-mode sonography.
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Radar techniques based on this division of a surface by range and by Doppler-shift are called range-Doppler methods.
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Methods: Using laser Doppler flowmetry to measure thechange of cochlear blood flow on superior cervical ganglion.
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Early subclinical rejection was diagnosed 3 after the transplantation by color Doppler examination.
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A blood pressure cuff and hand-held Doppler stethoscope are required to perform this test.
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Knowledge of Doppler flow velocimetry of the foetal MCA may assist in perinatal diagnosis and management of complicated pregnancies.
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In sub-field, I’m a big fan of “Observation of Atoms Laser Cooled below the Doppler Limit” (’below’ not capitalized, oddly enough): PRL 61, 169.
The Greatest Physics Paper!
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Down on the ground, 162 Doppler radar stations around the United States read atmospheric conditions as close to earth as possible.
