I wouldn't worry about it at all. Of course, by now you've had the MRI and should know, so if you post what happened other folks will know for sure, too- Which is what Curezone is all about.
Please post and say what happened.
The Colloidal Silver particle (theoretically, if you made your own @ ~5ppm) IMO is so small that it should only serve to "light up" the tissue image if anything, and IMHO probably won't even do that.
But that's an educated guess on my part, so please post back.