I have a few questions re SBS. The first is if SBS happened 1 or 2 years ago, would appear on an MRI? In other words, would an MRI show even the slightest damage that ws done to a child- or is it to late. Secondly, I've read that rough play can cause SBS- is this true? and when is a child big or old enough to engage in rough play, without the possibility of damage?