The tracer used in the bone scan I had on Monday can trigger security screening devices like those at airports. Because I knew I was flying today, I got a letter explaining that I'd had this tracer in case I set the device off.
I was kind of hoping that I'd set the device off - I thought it would be sort of cool to be that radioactive, in the way that I think it would be cool to be a superhero. Unfortunately (or fortunately, depending on your point of view), I did NOT set the screening devices a-buzzing. From this I conclude that I'm not radioactive anymore.
In case you're wondering, I'm in Edmonton for a few days. I'm taking the redeye back Monday night and arrive back in Toronto Tuesday morning.