Reblogged from xkcd
xkcd:
I calculate that the electrons in radiation therapy hit you at 99.8% of the speed of light, and the beam used in a 90-second gamma ray therapy session could, if fired with less precision, kill a horse (they did not let me test this).
This is why scars > tattoos.
Posted August 5, 2011 at 5:02 am 105 notes
love this comic. We do use tattoos to mark patients. I actually have one one my hand...I...