Results 61 to 70 of about 1,922,963 (250)
Pulsed and continuous wave doppler in heart lesions
Archives of Acoustics, 2015 Valvular obstructions and regurgitations can be diagnosed with either pulsed or CW Doppler. By recording the maximum velocities with CW Doppler the pressure drop across obstructions and across regurgitant valves can be obtained, permitting assessment of ...
Liv HATLE
doaj
MetrologyPhotoacoustic (PA) velocimetry offers a promising solution to the limitations of conventional techniques for measuring blood flow velocity. Given its moderate penetration depth and high spatial resolution, PA imaging is considered suitable for measuring ...
Haruka Tsuboi +2 more
doaj +1 more source
Penilaian Severitas Regurgitasi Aorta
Majalah Kardiologi Indonesia, 2013 Aorta regurgitasi (AR) adalah salah satu gangguan katup yang sering ditemukan. Ekokardiografi merupakan salah satu alat bantu diagnostik yang sangat penting untuk mendiagnosa AR serta untuk menilai severitas dari AR. Di siniakan disampaikan metode-metode
Andre P Ketaren, Amiliana M Soesanto
doaj +1 more source
A Digital Multigate Doppler Method for High Frequency Ultrasound
Sensors, 2014 Noninvasive visualization of blood flow with high frequency Doppler ultrasound has been extensively used to assess the morphology and hemodynamics of the microcirculation.
Weibao Qiu +11 more
doaj +1 more source
Accreting X-ray millisecond pulsars observed with INTEGRAL
, 2006 I review the properties of three X-ray accreting millisecond pulsars observed with INTEGRAL. Out of seven recently discovered accretion-powered pulsars (one discovered by INTEGRAL), three were observed with the INTEGRAL satellite up to 300 keV.
Falanga, Maurizio
core +3 more sources
, 2009 (abridged) Although discovered 40 years ago, the emission mechanism responsible for the observed pulsar radiation remains unclear. However, the high-energy pulsed emission is usually explained in the framework of either the polar cap or the outer gap ...
Arons +27 more
core +1 more source
Evaluation of a pulsed ultrasonic Doppler flowmeter [PDF]
The in vivo application of the pulsed ultrasound Doppler velocity meter (PUDVM) for measuring arterial velocity waveforms is reported.
Wells, M. K.
core +1 more source
Echocardiographic evaluation of velocity ratio, velocity time integral ratio, and pulmonary valve area in dogs with pulmonary valve stenosis. [PDF]
, 2018 BackgroundVelocity ratio, velocity time integral (VTI) ratio, and pulmonary valve area indexed to body surface area (iPVA) are methods of assessment of pulmonary valve stenosis (PS) severity that are less dependent on blood flow. Studies evaluating these
Bélanger, Catherine +5 more
core +1 more source
Learned Micro-Doppler Representations for Targets Classification Based on Spectrogram Images
IEEE Access, 2019 This paper proposes a new approach for classifying ground moving targets captured by pulsed Doppler radar. Radar echo signals express the Doppler effect that moving targets produce. A learned feature representation extracted from spectrogram images using
Esra Alhadhrami +3 more
doaj +1 more source
Journal of the American College of Cardiology, 1986 Pulmonary venous flow was evaluated by pulsed Doppler echocardiography in 38 patients with total anomalous pulmonary venous connection. Twenty-nine of these 38 had no associated intracardiac anomaly (Group I), and 9 had complex intracardiac anatomy ...
J. Smallhorn, R. Freedom
semanticscholar +1 more source