Skin Patches and MRI
The FDA has issued an alert to warn patients and imaging professionals that certain medicated skin patches can overheat during an MRI scan and cause a skin burn.
Apparently some patches contain aluminum and other metals in the backing that sticks to the skin. With more and more medications being administered through the "patch" the best advice is for patients to remove the patch prior to the MRI scan and replace a new one after.
This does not apply to CT scans or ultrasounds as they are a different technology.