My dad had this procedure done today (and he has had it done before,about 4 weeks ago)
He was injected with some kind of radio active goo that takes about 3 hours to (im assuming) seep into his bones & then x rays are taken to get a scanned image of his bones.
Your told to use a seperate loo as theres a small chance any waste product from your body is radioactive (same with blood- no blood samples can be taken) but you are only radio active for around 24 hours. Theres no side effects at all but you are advised to stay away from pregnant ladies & young children for 24 hours.
It sounds like your lady had the same thing & i doubt it will effect the polish at all. The only thing may be that if she has to go in for any furthur treatments or ops she will have to have all nail coatings removed beforehand, but I spose it depends what her healths like. Xx