Topic Explanation:
The discussion is about concerns related to undergoing an MRI scan with an ostomy bag and wafer. The original poster is seeking advice on whether the MRI will affect the ostomy appliance and if a bag change will be necessary afterward.

Advice and Insights:
1. Multiple users confirmed that MRI scans do not affect the ostomy bag or wafer. The magnetism involved in MRI does not impact plastic materials.
2. It is recommended to inform the nurse about having a stoma and to use the toilet to empty the bag before entering the scanning room.
3. Some users mentioned that the MRI process might involve a contrast dye injection or drinking a fluid, which can make the output looser. It is advised to empty the bag well before leaving the hospital.
4. A user noted that if there is any metal on the pouch, it could be affected by the MRI, but this is generally not a concern with most ostomy bags.
5. Users shared personal experiences of having MRIs with no issues, including the bag staying intact and not requiring a change afterward.