As far as wanting to match in Osteopathic Rads.....
Everyone says rotate at the program and work your A** off! Also, interviewing is key. They need to like you, and you have to be comfortable in the interview.
As far as the numbers go, I am not the guy to ask. I'm definately outside the norm as what people think when they think Rads scores. That being said, I interviewed well (I think) and I would consider myself better than average at the view-box. That is your opportunity to really make your impact. If you want to be a radiologist, know the basics. Know the bones of the wrist. Know what a brain bleed looks like. Be able to say what section of the lung a consolidation is in.
Otherwise, I don't know what to tell you. Hope this is somewhat helpful. If you have more specific questions, just post them!