Comparison of Radiation Dose and Image Quality: 320-MDCT Versus 64-MDCT Coronary Angiography

Abstract

Image quality was good for both 320- and 64-MDCT angiography. Overall radiation dose was significantly lower in 320-MDCT angiography when the heart rate was 65 beats/min or less. Every effort should be made to control heart rate to minimize radiation dose.