Table 1. Dose of radiation in living tissue by type of human exposure.

Radiation from high-altitude flights	0.001-0.01 mSv/hour
Radiation from natural lighting	0.01 mSv/day
Radiation from simple X-ray of the thorax (anteroposterior)	0.02 mSv
Radiation from simple X-ray of the foot (single exposure)	0.001 mSv
Radiation from surgical radioscopy	0.0375 mSv/3 months
Radiation from surgical radioscopy	0.21 mSv/3 months
Radiation from conventional CT, cranium	1.5 mSv
Radiation from conventional CT, ankle	0.07 mSv
Radiation from conventional CT, full body	9.9 mSv
Weight-bearing CT (WBCT) of the foot/ankle

Abbreviations: CT, computed tomography; mSV = millisievert.