How close must you be to someone with radiated pellets implanted in their body to have radiation exposure?

For example, if you sit next to someone with the aforementioned radiated pellets in an airplane, are you having radiation exposure?What if someone who has them in their prostate, or groin area, sits behind you in a movie theater, such that their lower body is directly behind your head? Is your brain being subjected to radiation?

yes you would get radiation but its not for long periods of time so it wont affect you in a negative way. I do hear that when a husband and wife one of them need radiation thearapy they should sleep in the next room cause if they sleep together everynight he or she is exposed to radiation every night but even though i have not heard of a case of being effected by the radiation negativly.