I think I'd go with the red bra...

Lead in the dye might present a problem. If it was 4 years ago, probably not a problem unless ya had the tat done in Mexico or Europe. MRI is magnetic resonating (ok, duh...). Metals are bad. You;re gonna get zapped with a wide array of alpha, gamma, beta - mostly gamma. Some neutrons too. Too much info? Don't worry. It'll heat up metals (especially if ya got contrast, which is radioactive iodine).

I wouldn't worry about it. What used to be called nuclear stuff is now called MRI. I'm an ex-nuke plant worker. I'm not concerned about CT's or MRI's (CT's are worse).

Tom