Results 161 to 170 of about 29,054 (216)
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Obstetrics and Gynecology Clinics of North America, 2004
The introduction of new techniques for evaluating fetal status, particularly fetuses at theoretical risk for hypoxic ischemic encephalopathy, requires the most rigorous evaluation before widespread clinical deployment. The considerations extend beyond clinical value to the significant medicolegal implications of a failure to predict or ascertain ...
Laura, Detti +3 more
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The introduction of new techniques for evaluating fetal status, particularly fetuses at theoretical risk for hypoxic ischemic encephalopathy, requires the most rigorous evaluation before widespread clinical deployment. The considerations extend beyond clinical value to the significant medicolegal implications of a failure to predict or ascertain ...
Laura, Detti +3 more
openaire +2 more sources
Doppler Velocimetry in Obstetrics
Obstetrics and Gynecology Clinics of North America, 1990Doppler ultrasound velocimetry offers a noninvasive method for assessing velocities in the various components of the fetal circulation including the cardiac, umbilical, cerebral, and aortic flows. As the volumetric flow measurement in these circumstances is prone to significant errors, the major approach has been to analyze the maximum frequency shift ...
D, Maulik, P, Yarlagadda, G, Downing
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Doppler velocimetry in pregnancy
Seminars in Ultrasound, CT and MRI, 1993Since the late 1970s, Doppler velocimetry has been investigated extensively for use in obstetrics. Initially, this technique showed promise for the management of certain complications of pregnancy; this promise has yet to be fulfilled. Doppler velocimetry of either the uterine or umbilical vessels, which showed some merit in selecting growth-retarded ...
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Burst-correlation laser Doppler velocimetry
Optics Letters, 1983The first continuous real-time burst-correlation laser velocimetry results obtained to our knowledge are reported. Measurements of turbulence power spectra and velocity-correlation functions with photon-correlation techniques are demonstrated.
R G, Brown, R, Jones
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Doppler velocimetry and placental disease
American Journal of Obstetrics and Gynecology, 1989Quantitative placental examinations were performed on 47 women who had Doppler flow velocity studies of the umbilical artery during their pregnancy. The systolic-diastolic ratio of the umbilical artery was used as the measurement parameter to divide the study population into two groups.
L A, Bracero +5 more
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Journal of Quantitative Spectroscopy and Radiative Transfer, 1988
Abstract Because it uses light scattering, Doppler shift, and optical heterodyne, laser Doppler velocimetry is an extremely powerful diagnostic technique for the measurement of flow velocity components. Its basic principles, optical arrangements, signal processing techniques, and applications are discussed as well as its advantages, disadvantages ...
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Abstract Because it uses light scattering, Doppler shift, and optical heterodyne, laser Doppler velocimetry is an extremely powerful diagnostic technique for the measurement of flow velocity components. Its basic principles, optical arrangements, signal processing techniques, and applications are discussed as well as its advantages, disadvantages ...
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Laser Doppler Velocimetry: Experimental Study
Applied Optics, 1974An experimental study on the general characteristics of the three different optical arrangements, namely, local-oscillator heterodyne, differential heterodyne, and symmetric heterodyne, is given. Both rotating Mylar disk and steady-state rotating flow are used to generate a uniform particle velocity or flow velocity.
C P, Wang, D, Snyder
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Multiple-line laser Doppler velocimetry
Applied Optics, 1988A laser Doppler velocimetry diagnostic fitting high-strain rate motion of solids as in shock wave experiments by now requires a single-mode laser. We have worked out a new method of increasing by 1 order of magnitude the luminosity of such a diagnostic.
S, Gidon, G, Behar
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