Results 221 to 230 of about 42,032 (254)

Proposed respiratory ‘gating’ mechanism for cardiac slowing

Nature, 1976
THREE of the essential variables concerned in the regulation of systemic cardiovascular performance are cardiac output, blood pressure and the resistance encountered by the blood in flowing through the systemic vascular bed. Cardiac output may be further considered as the product of cardiac stroke volume and heart rate.
O U, Lopes, J F, Palmer
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Methods of cardiac gating applied potential tomography

Clinical Physics and Physiological Measurement, 1988
Electrical impedance imaging of the heart, pulmonary perfusion and the great blood vessels can only be achieved by synchronising the data collection with cardiac activity. Due to low signal-to-noise ratio, temporal averaging is needed to improve the image quality.
B M, Eyüboglu, B H, Brown
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Clinically applicable gated cardiac computed tomography

American Journal of Roentgenology, 1983
Several attempts have been made to improve cardiac images obtained with x-ray transmission computed tomography (CT) by stopping cardiac motion through electrocardiographic gating. These methods reconstruct images that correspond to time intervals of the cardiac cycle identified by electrocardiography using either a pulsed x-ray beam at a selected time ...
P R, Cipriano, M, Nassi, W R, Brody
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Modulation of cardiac sodium channel gating by lysophosphatidylcholine

Journal of Molecular and Cellular Cardiology, 1991
The effects of lysophosphatidylcholine (LPC) on Na channels have been investigated in inside-out patches of adult rat ventricular cells using the patch-clamp technique. Applying LPC (9-25 microM) to the inner side of the membrane reduced peak Na current (INa) and prolonged the time course of INa inactivation. Both effects increased with duration of LPC
N A, Burnashev, A I, Undrovinas, I A, Fleidervish, J C, Makielski, L V, Rosenshtraukh   +4 more
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Automated cardiac self-gated radial CMRI

2015 IEEE International Symposium on Medical Measurements and Applications (MeMeA) Proceedings, 2015
Distortions in electrocardiogram (ECG) signals affect the image quality and increase scan time of Cardiac Magnetic Resonance Imaging (CMRI) exams. This study proposes an alternative method of acquiring CMRI cine images in mouse heart using a self-gated Ultra-short Echo Time (UTE) protocol.
Xiahan Yang, Yahong Rosa Zheng, Lixin Ma
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Clinical Impact of Cardiac-Gated PET Imaging

PET Clinics, 2013
Electrocardiogram-gated cardiac positron emission tomography is a valuable addition to the armamentarium of clinical positron emission tomography. It provides incremental diagnostic information and can be conveniently embedded into clinical protocols.
Stephan G, Nekolla, Julia, Dinges, Christoph, Rischpler   +2 more
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Optical flow estimation in gated cardiac SPECT

2012 IEEE Southwest Symposium on Image Analysis and Interpretation, 2012
In cardiac gated SPECT, image reconstruction suffers from several degrading factors including limited data counts, depth-dependent blur, attenuation, scatter, and motion blur. In our recent work it was demonstrated that use of motion-compensated temporal processing could lead to improved accuracy in 4D reconstruction.
Wenyuan Qi, Xiaofeng Niu, Yongyi Yang
openaire   +1 more source

Cardiac Multiple Gated Ultrasonography

1975
Cardiac gated ultrasonography is a technique for processing two dimensional cross-sectional stop-action images of cardiac anatomy. More recently, a process of providing simultaneous stop-action scans of nine equallv spaced points in the cardiac cycles has been developed (Cardio-Niner GateR).
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Cardiac gating in intravenous DSA.

European journal of radiology, 1986
ECG-gating of a pulsed radiation exposure during end-diastole using digital subtraction angiography shows significantly better results in the examination of the aortic arch vessels and pulmonary arteries and may be expected to decrease the rate of false positive diagnosis of stenosis when examining renal arteries.
E, Gmelin, H D, Weiss, F, Buchmann
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ECG-Gated Cardiac CT

American Journal of Roentgenology, 2004
Benoit, Desjardins, Ella A, Kazerooni
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