<prompt> Cardiac CT is done in ___:Early systoleMid systoleMid diastoleEarly diastole  <response>: Ans. C. Mid diastole Cardiac CT is done in mid diastole assisted by synchronous ECG gating. Cardiac CT is an example of multi slice CTmultidetector CT MDCT. In spiral CT only one section in one rotation. In MDCT multiple sections in one rotation. Cardiac CT is done in CAD and for coronary calcium scoring.- Coronary calcium scoring denotes degree of atherosclerosis and is done by the Agatston method. 