Umbhalo Waphansi

b Isievert iyisilinganiso sobungako bamandla imisebe ewafaka ezicubwini zomzimba. Imilliesievert (mSv) eyodwa iyingxenye eyodwa kweziyinkulungwane yesievert. EBrithani isilinganiso esiphakathi saminyaka yonke sicishe sibe u-2 mSv, futhi iX ray yesifuba inikeza u-0,1 mSv.