3 example sentences using roentgen.
Roentgen used in a sentence
Roentgen in a sentence as a noun
He did not wear his dosimetry badge, but his dose was estimated to be at least 100 roentgen.
"500 roentgen" is something more like about the LD50 for generic radiation due to bone marrow effects, so you'd expect around half of those viewers to survive without treatment.
Meta-comment: how is it possible that 2 reasonable, informative comments from roentgen are being downvoted?