Coronary CT angiography (CTA) is nowadays considered a non-invasive method to evaluate the coronary artery, with high sensitivity and negative predictive value. Increasing concerns have been raised regarding the radiation exposure associated with CTA. The image reconstruction process is a fundamental determinant of image quality and, thus, of the radiation dose that is necessary for generating a diagnostic CT image. 

The objective of our study was to evaluate the effect of Adaptive – Iterative Dose Reduction (AIDR) on  mean radiation dose and on image quality compared with traditional filtered back projection (FBP) for coronary CT angiography.