>That is why I wear a lead apron and the patient does not.<
Plus a lead apron on the patient probably wouldn't do much to protect them from radiation, given that they're the ones receiving treatment.
It always makes me laugh how paranoid people are about radiation. The precautions we had to take in my lab for tiny little vials of P-32 and S-35 were amazing compared to the complete lack of precautions mandated for chemical mutagens. Plus all that polio, Coxsackie virus, various pathogenic bacteria and fungi, and other nasty stuff in the unlocked freezers in the hallway. Guarded only by a semi-literate, very sleepy security guard.
Not to mention an occasional unbalanced ultracentrifuge. Now *that* can ruin your day.
But there were no precautions taken, nor was any of this stuff monitored.