Acquiring images of particular phases of the cardiac cycle, through either retrospective or prospective synchronization. Also called cardiac gating.

Controlling the timing or sequence of image data acquisition according to the phase of respiratory or cardiac cycles.

The respiratory phase can be used to control imaging either by only acquiring the image data during a particular portion of the respiratory cycle (which increases image acquisition time) or by adjusting the sequence of image data collection according to the phase of the respiratory cycle in such a way as to minimize motion-induced artifacts in the reconstructed image.

See also Respiratory Ordered Phase Encoding.

Sorting and possibly adjusting image data acquired asynchronously with the cardiac or respiratory cycle, according to the phase of the cycle at which it was acquired, so as to reconstruct a set of images corresponding to different phases of the cycle.

When two or more agents reacting together and producing a result greater than the sum of the individual agents.