Diagnostic Phase of Calcium Scoring Scan Applied as the Center of Acquisition Window of Coronary Computed Tomography Angiography Improves Image Quality in Minimal Acquisition Window Scan (Target CTA Mode) Using the Second Generation 320-Row CT

Table 2

Scanning parameters.

Parameter	Group 75%	Group CS	value
Contrast medium (mL)	45.5 ± 9.4	42.8 ± 8.0	0.17
Injection rate (mL/sec)	3.8 ± 0.8	3.6 ± 0.6	0.13
Tube current (mA)	397 ± 125	354 ± 92	0.08
Scan length (cm)	13.1 ± 1.3	12.9 ± 1.2	0.47
Effective dose (mSv)	1.87 ± 0.75	1.70 ± 0.66	0.28