Will i need to take out my belly button ring during head mri?

Yes: Yes, everyone is required to remove all jewelry before even entering the room in which an MRI is located. It's primarily a safety concern, but can also affect the quality of a scan. I once forgot to remove my metalic collar tabs from my shirt and before i even got close to the MRI scanner my collars were flapping like a bird trying to take off. Those magnets are extremely strong!