Originally Posted by
movingalong
(and stop using rems... its called Sieverts, heheh today's flamer post)
Rads/REMs were the units I used to use, before switching to the SI standard of Gray/Sievert. For those who really wanted to know, 100 Rad=1 Gray, 100 REM=1 Sievert, and Sievert=Gray*RBE (and also REM=Rad*RBE) where RBE is the relative biological effectiveness (about 1 for X rays).