Radiation doses of radiographic examinations

 

Examination

Effective dose (mSv)

Dose equivalence *) as PA images (number of)

Dose equivalence during exposure to background radiation

Limb, e.g. knee

0.01

0.3

1 day

Paranasal sinuses

0.03

1

3 days

Lung (PA view)

0.03

1

3 days

Lung (PA view and LAT view)

0.07

2

8 days

Cranial

0.1

3

12 days

Cervical spine

0.2

7

24 days

Mammography

0.2

7

24 days

Thoracic spine

0,4

13

1.5 months

Pelvis

0,3

10

1 month

Lumbar vertebrae

0,8

30

3 months

Abdomen (native)

0.8

30

3 months

Urinary tract (urography)

2.4

80

9 months

CT scans

Head

1.2

40

4.5 months

Pulmonary

4

130

16 months

Abdomen

7

230

2 years

Body 9 300 3 years
Interventional radiologi      
Coronary artery examination using a contrast medium 8 270 2.5 years
Percutaneous transluminal coronary angioplasty 20 650 6.5 years

*) PA = posterioranterior views
According to STUK’s investigation, the data presented in the table is equal to the average radiation expo-sure of a person residing in Finland. The doses caused by both background radiation and X-ray examinations vary in different locations. Variation in excess of 30 per cent is not uncommon.

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