Table 3.

Both radiation dose and injection parameters (mean ± SD), recorded after each scan

Radiation dose parameters	Group 1 (n = 29)	Group 2 (n = 18)	P-value
Total CTDIvol (mGy)	40 ± 9	38 ± 9	0.38
Total DLP (mGy.cm)	443 ± 135	521 ± 124	0.06
Total effective dose (mSv)	6 ± 2	8 ± 2	0.06
Helical	5 ± 1	6 ± 1	0.30
High-pitch	0.9 ± 0.1	1.8 ± 0.2	<0.001
CM injection parameters
Applied volume (ml)	40.0 ± 0.1	53.0 ± 0.1	<0.001
Applied flow rate (ml/s)	2.9 ± 0.0	3.9 ± 0.1	<0.001
Peak flow rate (ml/s)	3.4 ± 0.0	4.2 ± 0.0	<0.001
Peak pressure (psi)	54 ± 8	68 ± 8	<0.001