The Impact of Combining a Low-Tube Voltage Acquisition with Iterative Reconstruction on Total Iodine Dose in Coronary CT Angiography

Table 1

Technical scan and injection parameters of the different scan protocols.

Scan parameters	Standard of care protocol	Protocol A	Protocol B
Tube voltage (kVp)	120	80	100
Tube current (mA)	235	700	375
(mGy)	28.8	28.8	28.8
Scan type	Cardiac helical	Cardiac helical	Cardiac helical
Scan delay (s)	30	30	30
Image reconstruction model	FBP	ASiR 60%	ASiR 60%
Contrast media concentration (mg I/mL)	320	160	200
Injection volume (mL)	60	60	60
Injection rate (mL/s)	3	3	3
Iodine delivery rate (g I/s)	0.96	0.48	0.60
Total iodine dose (mg I/kg)	480	240	300

mg I/mL: milligrams of iodine per milliliter.
g I/s: grams of iodine per second.
mg I/kg: milligrams of iodine per kilogram of body weight.