Chloe had a scan on both her hips at about 7 weeks old because she was born with talapies (club feet).
It's nothing to worry about, all they did with Chloe was ask me to take her bottom half off and undo her vest and nappy, she was then laid on her side and a scanner was run over one hip and the same on the other side, I remember thinking how quick the procedure actually was, I think it was less than 10 mins.
I'm sure he will be fine.
Let us now how he gets on
Nay x