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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.
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.
Medical image information consistently collected during a specific phase of the cardiac cycle.
See also: gating