Here is some very interesting information for anyone who sits in the hospital waiting rooms or worse yet, gets a stress test with Tc-99m radioactive tracer dye.
Thanks to George Dowell, "Geo" NLNL/ New London Nucleonics Laboratory for this information and thanks to Craig-123 for sharing the link on the EneNews forum.
http://www.qsl.net/k/k0ff/Radiotracer%20Dose%20at%20a%20Distance/