Results 171 to 180 of about 1,922,963 (250)
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Pulsed Doppler echocardiography
1977Cardiac ultrasound has greatly enhanced our ability to define structural disorders in the heart and great vessels. While certain cardiac diseases lend themselves to firm diagnosis by M-mode echocardiography, many valvular and congenital disorders result in normal or nonspecific echocardiographic findings.
Donald Baker +2 more
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Pulse-Doppler correlation receiver
SPIE Proceedings, 1994We present the architectural and functional details involved in the development of a hybrid optical/digital processor for use in High Resolution Radar applications. Specifically, we describe within the context of a general radar receiver, the use of an advanced analog (optical) front end to perform the computationally intensive correlation processing ...
Peter A. Wasilousky, Dennis R. Pape
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Doppler invariant pulse compressors
Journal of the Franklin Institute, 1980Abstract A pulse compressor is utilized in many aspects of signal processing. Compression is usually accomplished by using special matched-filter-signal pairs. An alternative method takes advantage of the fact that any linear dynamic system can be excited to produce a time-limited output.
Dov Hazony, Yehonathan Hazony
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2006 3rd International Conference on Ultrawideband and Ultrashort Impulse Signals, 2006
The Paper contains measurement results of moving targets by pulse-Doppler UWB radar. The description of a radar, principle of operation and technical specification are presented. Conditions and results of measurements are described. Feature of the presented measurements: Doppler signals of linear moving targets whose linear sizes exceed resolution of ...
A. Chernenko, E. Ziganshin
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The Paper contains measurement results of moving targets by pulse-Doppler UWB radar. The description of a radar, principle of operation and technical specification are presented. Conditions and results of measurements are described. Feature of the presented measurements: Doppler signals of linear moving targets whose linear sizes exceed resolution of ...
A. Chernenko, E. Ziganshin
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The Journal of the Acoustical Society of America, 1997
A pulsed Doppler probe 10 for monitoring blood flow within a blood vessel 12 includes a sheath 17 and a plurality of electrically conductive wires 26 extending through the sheath 17. The wires 26 have distal ends 28 to which an ultrasonic transducer 18 is operatively connected.
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A pulsed Doppler probe 10 for monitoring blood flow within a blood vessel 12 includes a sheath 17 and a plurality of electrically conductive wires 26 extending through the sheath 17. The wires 26 have distal ends 28 to which an ultrasonic transducer 18 is operatively connected.
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Pulsed Doppler determinations of cardiac output in neonates: normal standards for clinical use.
Pediatrics, 1985Noninvasive monitoring of cardiac output can greatly facilitate the clinical assessment and management of neonates with cardiovascular compromise.
F. Walther +4 more
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Ultrasound Pulsed Doppler Velocimetry
Proceedings of the Annual International Conference of the IEEE Engineering in Medicine and Biology Society, 1992Among the numerous methods used for investigating the cardiovascular system, the Doppler technique is of particular importance position. This is due to the non invasive (transcutaneous probes) or low invasive (transoesophagcal probes) approach it provides.
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2004
A Doppler radar is defined by as 'a radar which uses the Doppler effect to determine the radial component of relative radar target velocity or to select targets having particular radial velocities.' A pulse-Doppler (or pulsed-Doppler) (PD) radar is defined as 'a Doppler radar that uses pulsed transmissions.' PD radar is used extensively for detecting ...
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A Doppler radar is defined by as 'a radar which uses the Doppler effect to determine the radial component of relative radar target velocity or to select targets having particular radial velocities.' A pulse-Doppler (or pulsed-Doppler) (PD) radar is defined as 'a Doppler radar that uses pulsed transmissions.' PD radar is used extensively for detecting ...
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Pulse Doppler Ambiguity Resolution
IEEE Transactions on Aerospace and Electronic Systems, 1972A mathematical algorithm using the method of invariant imbedding is developed which generates a best £2 estimate of range and range rate from pulse Doppler data.
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Ultrasound pulse Doppler tomography
IEEE 1988 Ultrasonics Symposium Proceedings., 2003It is shown that pulse Doppler CT (computerized tomography) leads to more complete flow images than conventional flow imaging does; not only forward and reverse flow directions but also transverse directions are registered and imaged using a suitable color code.
J.K. Schmolke, H. Emert
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