Table 1.

CT scan parameters

	IV contrast	IV contrast protocol	kV	auto mA	Noise index	Matrix	Collimation	Reconstructed slice thickness
Contrast-enhanced CT	Iohexol 300 mg iodine/ml (50 ml)	Acquired 3 min post injection	140	Range 100–515	2.8	512	Non-helical 4 × 5 mm detectors	0.625 mm with standard algorithm
CTA	Iohexol 300 mg iodine/ml (50 ml)	5 ml/s with a 50 ml/saline flush	80	Range 50–400	7	512	Helical 0.7 s rotation, pitch 0.984:1, slice interval 0.625 mm	0.625 mm with standard algorithm