Conversion factors of effective and equivalent organ doses with the air kerma area product in patients undergoing coronary angiography and percutaneous coronary interventions

•E/KAP and HT/KAP conversion factors reliably predicts E and HT in patients.•E/KAP and HT/KAP conversion factors do not depend on patient’s sex or weight.•E/KAP and HT/KAP may depend on the procedure protocol adopted in different centers.•ICRP 103 based E/KAP is 30% higher than E/DAP previously estimated with ICRP 60.