Is there any alternative test for barium enema in kids that not involved radiation?

A simple KUB ( abdominal x-ray) may give me information I need to provide care & this has a fraction of the radiation of the BE. However, there are no studies I am aware of that do not involve at least some radiation that provide comparable information. When/if detailed information about the condition of the colon is needed it is the study that provides the most data of its type.