Store CGImageRef in a NSDictionnary

My app is using a set of CGImageRef and I am wondering how to store them in an NSMutableDictionary in order to avoid memory leakes (How to transform them into NSObject and how to CFRelease properly)

Thanks in advanc开发者_JS百科e for your help,

Regards,

---

I believe something like this was answered here: How do I create a mutable array of CGImageRefs?