This topic is about the safety of undergoing an MRI scan if you have an ostomy wafer and pouch. The main concern is whether the magnetic field from the MRI will affect these appliances and if you need to change your bag afterward. Here are some helpful insights and advice from people who have experience with this:

1. Many people who have had abdominal, pelvic, or enterography MRIs say that the magnetic field does not affect standard ostomy appliances. The wafers and pouches stayed secure and worked fine after the scan.

2. The plastic parts of the ostomy appliances are not affected by the MRI's magnetism. Only metal parts could be a problem, but most modern pouches, even those with plastic charcoal filters, do not contain metal, making them safe for MRIs.

3. You do not need to change your bag just because you had an MRI.

4. Here are some practical tips:
- Let the intake nurse or technologist know that you have a stoma.
- Empty your pouch right before you go into the scanner room.
- Be ready for a restraining belt across your abdomen; it might feel tight but won't disturb your appliance.
- If contrast dye or oral contrast is used during the MRI, you might have looser output afterward, so plan to empty your pouch before you leave the facility.

5. A retired MRI technologist mentioned that only metal on or in the pouch would be a concern. If there's no metal, there's nothing to worry about.

6. People who have regular MRIs and recent scans report no issues with leaks, loosening, or wafer failure.