cardiac gating


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gating

 [gāt´ing]
1. controlling access or passage through gates or channels.
2. selection of electrical signals by a gate, which passes signals only when a control signal, the gate pulse, is present, or which passes only signals with certain characteristics, such as a pulse height.
3. substrate-binding– or ligand-binding–induced opening and closing of a biologic membrane channel, believed to be due to conformational changes in proteins lining the channels.
cardiac gating selective acquisition of cardiac function information at specific points in the cardiac cycle by using information from the electrocardiographic signal to time the cardiac cycle and control image sampling. It has been used in digital subtraction angiography, computed tomography, nuclear cardiology, and magnetic resonance imaging.

car·di·ac gat·ing

using an electronic signal from the cardiac cycle to trigger an event, such as in imaging separate phases of cardiac contraction.

car·di·ac gat·ing

(kahr'dē-ak gāt'ing)
Using an electronic signal from the cardiac cycle to trigger an event, such as in imaging separate phases of cardiac contraction.

cardiac gating

Medical image information consistently collected during a specific phase of the cardiac cycle.
See also: gating
References in periodicals archive ?
Absolute cardiac gating uses a fixed time delay after the preceding R-wave peak.
Cardiac gating is used by both specialties to minimize the effects of heart, lung and diaphragm motion on image quality.
Techniques that use cardiac gating are viewed in cine mode to simulate the flow of blood in the renal arteries during the cardiac cycle.
X-SPECT's cardiac gating capability is allowing us to evaluate not only regional perfusion but also regional and global LV function and volume in the setting of myocardial infarction and post-infarction remodeling," Dr.
Cardiac gating allows researchers to accelerate their studies aimed at understanding the disease and finding a cure, by performing highly accurate in-vivo molecular imaging at the pre-clinical level.
Cardiac gating is critical to imaging accuracy in the heart, as it freezes the movement of the heart during its expansion and contraction phases, heightening image clarity and removing blur.