Table III.

Comparison of radiation dose with each investigation in comparison to commercial air travel and background radiation exposure [24–26]

Investigation	Mean ED (mSv)	Commercial air travel flight equivalent (hours)	Equivalent days of background radiation exposure	Relative excess risk of developing cancer
Single AP radiograph	0.022	5.5	6.3	0.08 (0.02–0.18)
Single cross-table radiograph	0.026	6.5	7.4	0.09 (0.02–0.2)
Single frog lateral radiograph	0.027	6.75	7.7	0.1 (0.02–0.22)
Low-dose CT scan of hip including assessment of femoral anteversion	3.04	760	868.6	11.8 (2.9–25.1)