Table 3

The relative contribution of different radiological investigations to total radiation exposure in children with CF at our centre

Age of child		0 to <1 year	1 to <5 years	5 to <10 years	10 to <15 years	15 to <18 years
CXR	Number*	1 (1–2)	5 (3–8)	9 (4–20)	12 (10–15)	17 (5–22)
CXR	% Total radiation^†	100%	77%	23%	10%	7%
HRCT chest	Number*	0 (0–0)	0 (0–1)	1 (0–5)	2 (1–2)	2 (1–3)
HRCT chest	% Total radiation^†	0%	19%	65%	84%	79%
AXR	Number*	0 (0–0)	0 (0–1)	0 (0–3)	0 (0–1)	0 (0–2)
AXR	% Total radiation^†	0%	4%	3%	0%	1%
Abdomen and pelvis CT	Number*	0 (0–0)	0 (0–0)	0 (0–0)	0 (0–0)	0 (0–2)
Abdomen and pelvis CT	% Total radiation^†	0%	0%	0%	0%	5%
Sinus CT	Number*	0 (0–0)	0 (0–0)	0 (0–1)	0 (0–1)	0 (0–1)
Sinus CT	% Total radiation^†	0%	0%	0%	1%	2%
Fluoroscopy	Number*	0 (0–0)	0 (0–0)	0 (0–4)	0 (0–1)	1 (0–3)
Fluoroscopy	% Total radiation^†	0%	0%	9%	5%	5%

↵*Total number of investigations performed on children that age presented as median (range).
†% Total radiation presented as mean.
AXR, abdominal X-ray; CF, cystic fibrosis; CXR, chest X-ray; HRCT, high-resolution CT.