Radiation risk from medical imaging: Difference between revisions
| Line 35: | Line 35: | ||
|Chest x-ray (2-views) | |Chest x-ray (2-views) | ||
|0.1 | |0.1 | ||
|1 in | |1 in 197,628 | ||
|1 in | |1 in 147,929 | ||
|- | |- | ||
|Pelvis x-ray | |Pelvis x-ray | ||
|0.6 | |0.6 | ||
|1 in | |1 in 32,960 | ||
|1 in | |1 in 24,655 | ||
|- | |- | ||
|Neck x-ray | |Neck x-ray | ||
|0.2 | |0.2 | ||
|1 in | |1 in 98,912 | ||
|1 in | |1 in 73,964 | ||
|- | |- | ||
|L-spine x-ray | |L-spine x-ray | ||
|1.5 | |1.5 | ||
|1 in | |1 in 13,184 | ||
|1 in | |1 in 9,863 | ||
|- | |- | ||
|Extremity x-ray | |Extremity x-ray | ||
|0.001 | |0.001 | ||
|1 in | |1 in 20,000,000 | ||
|1 in | |1 in 14,285,714 | ||
|- | |- | ||
|'''Computed Tomography''' | |'''Computed Tomography''' | ||
| Line 65: | Line 65: | ||
|CT head | |CT head | ||
|2 | |2 | ||
|1 in | |1 in 9,887 | ||
|1 in | |1 in 7,397 | ||
|- | |- | ||
|CT neck | |CT neck | ||
|6 | |6 | ||
|1 in | |1 in 3,296 | ||
|1 in | |1 in 2,466 | ||
|- | |- | ||
|CT L-spine | |CT L-spine | ||
|5.6 | |5.6 | ||
|1 in | |1 in 3,531 | ||
|1 in | |1 in 2,642 | ||
|- | |- | ||
|CT Pulmonary Angiography | |CT Pulmonary Angiography | ||
|15 | |15 | ||
|1 in | |1 in 1,318 | ||
|1 in 986 | |1 in 986 | ||
|- | |- | ||
|CT Abdomen, Pelvis | |CT Abdomen, Pelvis | ||
|14 | |14 | ||
|1 in | |1 in 1,413 | ||
|1 in | |1 in 1,057 | ||
|- | |- | ||
|CT Chest, Abdomen, Pelvis | |CT Chest, Abdomen, Pelvis | ||
Revision as of 18:47, 19 January 2017
Tests and Radiation Amounts
| Procedure | Radiation Dose (mSv) | Additional Cancer Risk | |
|---|---|---|---|
| Male | Female | ||
| Comparison Doses | |||
| Average US Esposure | 6.2 mSv/year | ||
| 7-hour Airline Flight | 0.02 | ||
| Plain Radiograph | |||
| Chest x-ray (2-views) | 0.1 | 1 in 197,628 | 1 in 147,929 |
| Pelvis x-ray | 0.6 | 1 in 32,960 | 1 in 24,655 |
| Neck x-ray | 0.2 | 1 in 98,912 | 1 in 73,964 |
| L-spine x-ray | 1.5 | 1 in 13,184 | 1 in 9,863 |
| Extremity x-ray | 0.001 | 1 in 20,000,000 | 1 in 14,285,714 |
| Computed Tomography | |||
| CT head | 2 | 1 in 9,887 | 1 in 7,397 |
| CT neck | 6 | 1 in 3,296 | 1 in 2,466 |
| CT L-spine | 5.6 | 1 in 3,531 | 1 in 2,642 |
| CT Pulmonary Angiography | 15 | 1 in 1,318 | 1 in 986 |
| CT Abdomen, Pelvis | 14 | 1 in 1,413 | 1 in 1,057 |
| CT Chest, Abdomen, Pelvis | 21 | 1 in 942 | 1 in 704 |
More Information
- Data from: http://www.xrayrisk.com/, additional cancer risk based on estimated 50 year-old male/female.
- How information is calculated: http://www.xrayrisk.com/about.php/
Pregnancy
- Greatest risk of harm during organogenesis (3-8 WGA)
- IV contrast not teratogenic (class B)
- PO contrast not absorbed = no risk
Exposure Risk
- <5,000 mrads = safe
- ~10,000 mrads = small risk childhood CA
- ~15,000^ mrads = 6% chance mental retardation
- <3% chance childhood CA
^Considered max
Always use shield when possible