Table 1.

Protocols and doses of chest CT.

	Age (years)/weight (kg)
Thorax	1–6/10–25	6–12/25–40	>12/>40
Scout view AP+ lateral 80 kV, 10 mA	+	+	+
Gantry rotation time (s)	0.5	0.5	0.5
Pitch	1.375	1.375	1.375
Slice thickness (mm) nom/rec	0.625/2.5	0.625/5 (2.5)	0.625/5 (2.5)
kV/mA	100/160	120/120–180	120/180
CTDIw (mGy)	2.59	3.92	4.06
DLP (mGycm)	58.87	156.4	134.3
Matrix size	512×512	512×512	512×512
FOV (mm)	240	240	240