Let the hive mind of Engadget get that for you.
"As someone who doesn't reside in the USA, I was wondering what would be the best way to get internet for my computer in the US for a couple of weeks? If it were Europe I know I'd look for some prepaid data. Is there anything similar offered by American carriers? A MiFi or a data SIM that I can tether from would work, but I'm trying to maintain a tight budget. Help!"
I don't think I'd be comfortable by the idea of having anything metallic / magnetic inside of me... then having it go through an MRI ..
Theres a reason why they ask you to remove any body jewelry or are hesitant to preform an MRI if you have any type of internal metal screws or plates.
then again no one else has mentioned anything about this.. so I guess I'm missing something