That brain scan stuff is totally cool; I would love to get that for my DD. It has the potential to really give an accurate diagnosis, as opposed to, say, checklists filled out by hostile teachers.
Also I agree with mon and CCN--need to know. And only *what* they need to know--like, for babysitters, just say don't let him have the sugary snacks or he will bounce off the walls (or whatever it is they might need to deal with). They do not need to know what his diagnosis is, or even whether he has one. Good luck
