Ask a Neurologist and Get an Answer ASAP
Do you know the specific brand name of the shunt? Is it a programmable shunt?
And are you asking about airport security, or an actual MRI scan of the brain?
There will be no effect to you or the airport scanner with this shunt.
You are fine to go through airport security.
It will not negatively affect you in any way.
(If you had a MRI of the brain, the shunt itself would need to be checked to make sure the setting was correct afterwards, but that is only with a MRI scan).