|
Target organs |
Exam type |
Effective dose in adults[1] |
Equivalent time of background radiation[1]
|
CT of the head |
Single series |
2 mSv |
8 months
|
With + without radiocontrast |
4 mSv |
16 months
|
Chest |
CT of the chest |
7 mSv |
2 years
|
CT of the chest, lung cancer screening protocol |
1.5 mSv |
6 months
|
Chest X-ray |
0.1 mSv |
10 days
|
Heart |
Coronary CT angiography |
12 mSv |
4 years
|
Coronary CT calcium scan |
3 mSv |
1 year
|
Abdominal |
CT of abdomen and pelvis |
10 mSv |
3 years
|
CT of abdomen and pelvis, low dose protocol |
3 mSv[2] |
1 year
|
CT of abdomen and pelvis, with + without radiocontrast |
20 mSv |
7 years
|
CT Colonography |
6 mSv |
2 years
|
Intravenous pyelogram |
3 mSv |
1 year
|
Upper gastrointestinal series |
6 mSv |
2 years
|
Lower gastrointestinal series |
8 mSv |
3 years
|
Spine |
Spine X-ray |
1.5 mSv |
6 months
|
CT of the spine |
6 mSv |
2 years
|
Extremities |
X-ray of extremity |
0.001 mSv |
3 hours
|
Lower extremity CT angiography |
0.3 - 1.6 mSv[3] |
5 weeks - 6 months
|
Dental X-ray |
0.005 mSv |
1 day
|
DEXA (bone density) |
0.001 mSv |
3 hours
|
PET-CT combination |
25 mSv |
8 years
|
Mammography |
0.4 mSv |
7 weeks
|