Gating is the technique of synchronizing the motion of the heart with the images taken during tomography to eliminate blurring normally caused by the beating of the heart.
Computed tomography (CT) scans are completed with the use of a 360-degree x-ray beam and computer production of images. These scans allow for cross-sectional views of body organs and tissues.
Initially using the x rays to scan layers of the area in question, with computer assisted tomography a computer then analyzes data of all layers to construct a 3D image of the object.