“…MSCT is a useful tool for the diagnosis of coronary artery [20][21][22][23][24][25], myocardial [15,[26][27][28][29][30][31][32][33][34], congenital cardiac [35][36][37][38] and aortic diseases [39][40][41][42][43], and since the number of acquisition systems has increased up to 256-320 [44][45][46], ECG-gated acquisition is readily available for clinical use. One of the demerits of the procedure is that the total radiation exposure in ECG-gated acquisition in the thorax is approximately 2 times higher than that of non-ECG gated acquisition following conventional protocols using a constant tube voltage and current.…”