It all makes perfect sense to me, but I've had to battle my insurance co on a couple of issues in the past and wonder how they will view a scan without symptoms. Maybe the obvious answer is to fabricate a little. It's too important to let a little thing like symptoms stand in the way! Thank you, Lisa, for pointing this out. I've never had any tests include the head. I always hoped that symptoms would begin immediately with mets, but I guess that's not the case.